Safety valve heating and electric water heater with hot water leakage when no one

If this situation is normal, as mentioned above, when no hot water, electric water heater there is equivalent to a closed system, this time inside the water is heated, temperature, volume expansion, but because electric water heater tank volume is constant, there is no place to absorb the expansion water, so the water pressure inside the water heater will be increased when the pressure is greater than the take-off when the pressure relief valve, pressure relief valve will take off within the protection of the water heater bile, is what we see in the drip valve. If you want to in this case the safety valve is not dripping, you can install an expansion tank in the Italian Akusitan pipeline between the safety valve and the water heater to absorb the amount of expansion produced after water is heated, the heating time electric heater, water pressure will not rise much;

The difference between safety valve and pressure relief valve

[1] Simply put, the pressure relief valve to prevent the system exceeds a certain value, is mainly used to protect the system, the valve is to reduce the system pressure from a high pressure to the appropriate value required for its export pressure a range, as long as this range can be.
[2] Safety valve: valve is opening and closing pieces by the external force is normally closed state, when the device or media pressure inside the pipe rises above a predetermined value, by medium pressure pipeline or equipment to the outside of the system to prevent the emission medium special valve exceeds a predetermined value. Safety valves are automatic valves, mainly used in boilers, pressure vessels and piping, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role. Note the safety valve must be pressure tested before use.
[3] valve: valve by regulating the inlet pressure is reduced to the outlet pressure of a need, and rely on the energy of the medium itself, so that automatically maintain a stable outlet pressure valve. From the point of view of fluid mechanics, pressure reducing valve is a local resistance to change spending components, that is, by changing the throttle area, so that the kinetic energy of change velocity and the fluid, resulting in different pressure loss, so as to achieve the purpose of decompression. And then rely on regulation and control and regulation systems, so that the valve pressure fluctuations and the spring force balanced, so that the pressure after the valve

Installation considerations gas safety valve

1, the installation directions: Make sure the gas valve mounted horizontally, and the direction of the arrow solenoid valve body surface with the gas medium flow direction consistent with the solenoid valve head upright.
2, pipeline media: should be clean and free of particulate impurities, and non-corrosive. If necessary, install a filter in front of the solenoid valve.
3. Installation Environment: Indoor or outdoor rain facilities. Ambient temperature -10∽ + 50 ℃, relative humidity 5-95%.
4, the operating space: Make sure the solenoid valve in manual operation there is sufficient room for maneuver, and leave the space required equipment maintenance. General solenoid valve top space height should be more than 20CM.
Power connection: from within the explosion-proof lead frame leads to the power cord. Proceed as follows:
(1), completely loosen the lock nut, cover the surface of the lead screw the M5 set screw, lead screw off the cover to expose the built-in terminal.
(2), the RVV0.75 * Type 2 wires through the lock nut and the lead cover is connected to the built-in terminals, tighten the screw pressed line.
(3), tighten the wire cover, tighten its surface M5 set screws, completely tighten the lock nut. Instantaneous power test, the solenoid valve shall be able to move the action.

Combination gas cooker safety valve and solenoid valve

gas stove valves and safety valve interlocking mechanism, the safety valve is mounted on a gas valve body, the valve features a sealed chamber, sealed chamber equipped with a rotatable pawl, in turn shifted ground rodIt has an ear and a hook, lug with the gas in contact with the bottom of the valve stem within the valve, the valve slider hook with safety solenoid valve spool at the bottom of the contact.
It is simple, easy to use, small size, low cost, feel good.

Gas valve switching direction

We see everyday gas valve or seal lid clockwise is off, counterclockwise are open. For example, the cover of bottled water, bottled honey closures are like this. The scientific statistical proof: People in knee-jerk reaction or instinctive action is clockwise operation. Therefore, the provisions of the Gas Valves clockwise to off (safe state), this design is a scientific basis.

How open gas meter valve

Natural gas meter can be divided into several, one is the common gas meter, that can not install the battery, with only a mechanical counter, then this is not the inner table of the valve to shut you breathe it, you must use gas valve table after table or in front, the other is intelligent gas meter with LCD display, you must install the valve, usually such a table is prepaid, then this internal table are valves in your inner table there is the case of the remaining gas, the valve has been opened, if there is no remaining volume in the table when the valve will automatically close. This time you have to recharge in order to open the valve, but if you really need to close the valve, you can remove the battery, this time, the valve will be closed within a table.

Body type Gas Control Valve

Many types of Gas Control Valve body, commonly used through single-seat, through two-seater, angular, diaphragm, low flow, tees, eccentric rotation, butterfly, sleeve type, spherical, etc. In specific choices, do the following consider: (1) disc shape of the structure, flow characteristics and mainly based on the selected factors to consider such as power imbalances (2) wear resistance, when the fluid medium is a suspension containing a high concentration of abrasive particles, valve. internal material to be hard. (3) corrosion resistance, as a corrosive medium, try to choose simple valve. (4) medium temperature, pressure, when the medium temperature, high pressure and great change, should be used and the valve spool seat materials by temperature and pressure changes small valves. (5) to prevent steam and air, steam and air only in a liquid medium in the actual production process, steam and air will form a vibration and noise, shorten the life of the valve, so the choice should Propane Control Valve prevents the valve generate steam and air

When the gas fire, you should first close the valve, what fire works?

Cut off fuel.
Extinguishing principle of water: the water itself does not burn, cover the surface of the combustible material to absorb a lot of heat, the temperature of fuel drastically reduced to less ignition point, and water vapor produced in the combustible surface covering, also played a cut off the air role.
Carbon dioxide fire extinguishing principle: because of the carbon dioxide itself does not burn or support combustion, density greater than air, played the role of isolated air, without oxygen naturally extinguish the fire.
Overall, biomass burning have two conditions: a temperature drop below the ignition point, the absence of air between two indispensable fire, meet one of the conditions, the fire can be extinguished.!

Development of Chinese valve industry

Many Chinese valve industry chain, but non-valve power. To see the whole country has entered the ranks of the world's great powers valves, but the product quality from the point of view of the valve power is still a long gap. Production industry concentration, low-end products supporting the valve research and development capabilities, the valve industry and low level of manufacturing technology still exists, import and export trade deficit expanded.
The coming years will be the speed of the shock valve industry, a direct consequence of this is to bring high-speed shocks causing the valve cabinet brands to expand the trend of polarization camp. Really be able to survive in the market of the valve business is absolutely not so much. But this high-speed oscillation valve industry will bring tremendous opportunity to shock the result will make the market more rational operation.
Localization of the road-end valve abnormality "bumpy"
Valve industry in national economic development, as an important part of the manufacturing sector to prepare, play a very important role. Since the level of domestic and international advanced valve manufacturing is still a gap compared to the level, a lot of high-parameter, high temperature and high pressure, high level of critical valves former pound has been dependent on imports, in order to urge the valve localization
Actively adopt international standards for product design; absorbing foreign outstanding design structures (including patented technology); product testing, performance testing in strict accordance with international standards; absorption of foreign advanced production technology and experience emphasis on research and application of new materials; clarify imports high parameters valve product technical parameters and working conditions, etc. is to accelerate the localization process, promoting the valve product updates, the full realization of localization only way valve.
With the accelerated pace of the valve industry restructuring, the industry will be the future of the vsafety gas valveand product competition between brands, product development to high-tech, high-parameter, strong corrosion resistance, high-life direction, only through constant technological innovation, development new products, technological innovation, in order to gradually increase the level of product technology, to meet the domestic means of supporting the full realization of the gas valve localization. China's valve manufacturing industry in the huge demand environment, will show better prospects for development.

Development of Chinese valve industry

Many Chinese valve industry chain, but non-valve power. To see the whole country has entered the ranks of the world's great powers valves, but the product quality from the point of view of the valve power is still a long gap. Production industry concentration, low-end products supporting the valve research and development capabilities, the valve industry and low level of manufacturing technology still exists, import and export trade deficit expanded.
The coming years will be the speed of the shock valve industry, a direct consequence of this is to bring high-speed shocks causing the valve cabinet brands to expand the trend of polarization camp. Really be able to survive in the market of the valve business is absolutely not so much. But this high-speed oscillation valve industry will bring tremendous opportunity to shock the result will make the market more rational operation.
Localization of the road-end valve abnormality "bumpy"
Valve industry in national economic development, as an important part of the manufacturing sector to prepare, play a very important role. Since the level of domestic and international advanced valve manufacturing is still a gap compared to the level, a lot of high-parameter, high temperature and high pressure, high level of critical valves former pound has been dependent on imports, in order to urge the valve localization
Actively adopt international standards for product design; absorbing foreign outstanding design structures (including patented technology); product testing, performance testing in strict accordance with international standards; absorption of foreign advanced production technology and experience emphasis on research and application of new materials; clarify imports high parameters valve product technical parameters and working conditions, etc. is to accelerate the localization process, promoting the valve product updates, the full realization of localization only way valve.
With the accelerated pace of the valve industry restructuring, the industry will be the future of the vsafety gas valveand product competition between brands, product development to high-tech, high-parameter, strong corrosion resistance, high-life direction, only through constant technological innovation, development new products, technological innovation, in order to gradually increase the level of product technology, to meet the domestic means of supporting the full realization of the gas valve localization. China's valve manufacturing industry in the huge demand environment, will show better prospects for development.

Gas valve

Install on the burner gas manifold connected to the valve for regulating the amount of gas called the gas valve.
When the stove in the combustion period, the combustion valve (also known as combustion ram) and Bbq Gas Valves (also known as gas gate) after full, open valve, by adjusting the valve opening at different angles to adjust the amount of gas in order to ensure stove operate smoothly. Automatic burning stove, the electrical control of the valve, according to the required amount of gas stove, automatically adjusted

Classification of the safety valve

Pilot Safety Valves structure are two major categories: spring and leveraged. Spring means sealing valve and valve seat by spring force. Leveraged rely on leverage and weight forces. With the large capacity needs, harboring a pulse valve, also known as the pilot valve, the main valve and the auxiliary valve. When the pipeline medium pressure exceeds a predetermined pressure value, the auxiliary valve to open, the media along the catheter into the main valve and the main valve is opened to reduce the media pressure increased.
Pilot operated safety valvee emissions depends on the caliber of the valve seat and valve opening height, it can be divided into two types: Weiqi opening height is the seat diameter (1/20) - (1/40), the entire Kai It is (1/3) - (1/4).
In addition, with different requirements, there are enclosed and not enclosed. Closed namely discharged media is not compromised, the entire exhaust outlet along a predetermined, generally used for toxic and corrosive media. Enclosed is generally not used for toxic or corrosive media.

the composition of the hydraulic system

After the oil flow manifold holes of play to produce a certain pressure loss, its value is an important symbol to reflect the block design quality and level of integration means, obviously, hydraulic cutting machine the less manifold hole in the process, additional pressure loss smaller.

Hydraulic manifold features are there?

Hydraulic manifold consists of integrated hydraulic components (such as stack valves). When ferrule use for one wire hose the composition of the hydraulic system with integrated hydraulic components, without additional connection block, which is connected to the body's own body as a direct composite made. and then find DIN2430A mounting surface iFeature in the feature library, the pop-up dialog box shown in Figure 3, first picked up on the hydraulic manifold surface, and then need to specify the angle in accordance with the design, click "Finish." In order to achieve a reasonable arrangement manifold surface around the hydraulic valve and its proper arrangements through the hole, you can follow the contours of the size and location of the oil port of pre-made components hydraulic valve model, the relevant view on the manifold arrange a suitable location.

Use gas valve

gas valve is a safety device supporting a new gas pipeline projects; to cut off, turn on, adjust the gas pipeline, has good control properties and close the sealing performance; suitable for city gas, liquefied petroleum gas, natural gas, a variety of gas medium pipeline oxygen.
Bbq Gas Valves are widely used for a variety of city gas pipeline network system media pipeline gas, liquefied petroleum gas, natural gas, oxygen, etc; drive in the form of a manual, worm gear, electric, pneumatic, hydraulic, electro-hydraulic actuator linkage, can realize remote control and automation.

Safety gas aluminum valves

① before the safety gas aluminum valves factory, should one by one to adjust the opening pressure setting value of user requirements. If the user make spring working pressure level, the general should be adjusted lower limit of the pressure level of the factory.
② user before the safety valve is installed on the protected equipment or before installation, you must re-adjusted at the installation site, in order to ensure that the setting pressure relief valve to meet the requirements.
③ spring working pressure level within the range of nameplate by the rotation adjustment screw to change the amount of compression spring can be adjusted to opening pressure.
④ Before the rotation adjustment screw, the Water Heater Gas Valves inlet pressure should be reduced to 90% of the opening pressure of the following, in order to prevent the valve is rotated when the rotation adjustment screw, which damage the sealing surface.
⑤ To ensure accurate opening pressure value, should make adjustments in the medium conditions, such as media type, temperature as close to the actual operating conditions. Media types to change, especially when the media is not the same accumulation of state (for example, from liquid into vapor), the opening pressure changes often. When the temperature increases, the opening pressure is generally decreased. It is adjusted at room temperature and used at high temperatures, the set pressure value at room temperature should be slightly higher than the required opening pressure. To what extent the valve structure and material selection have a relationship should be based according to the manufacturer's instructions.

Safety valve

Safety valve is to synchronize the rotation of the coupling drag, friction and will not have any contact with. Gas Heater Control Valve to reduce the impact of vibration motor, and the impact caused when the vibration of the motor. In the medium through, the amount of lubricating the inner and outer magnetic rotor will be relative to the Pilot operated safety valve and the motor has a protective effect. Valve actuator in the case of work, but also may appear stuck phenomenon, magnetic rotator will automatically fall off, to protect the body does not hurt.

Gas water heater role and function of the solenoid valve

Usually gas water heater in accordance with the normal start procedure is: first, through the water, and then start the micro switch, the machine is powered and ignition, in 1-3 seconds after ignition, the magnet valve is energized, ventilation, combustion. If you lose a gas water heater valve, through the water at the time, namely ventilation, and if the ignition delay, the gas filled chamber when the detonation will occur. And talking about here is a vapor gas water heater solenoid valve linkage effect.

Pulse ignition because no flame is detected to maintain the current signal

Pulse ignition because no flame is detected to maintain the current signal, unable to maintain normal gas water heater valve open, closed heater gas valve, cut off the supply of gas. Gas water heater can be friction armature movement is minimized, so that the starting current and voltage to a minimum, saving energy, but also can guarantee quick action for battery-powered gas water heater, and the use of water as the power of self-generation gas water heaters are suitable.

Works gas water heater solenoid valve

Cold water into the food, water and gas flowing through the joint body under a certain pressure difference between the effect of the flow of water, promote Gas valve for water heater, and push the micro switch will power on and start the Pulse Controller, open the gas water heater valve, gas water heater burner ignition; after burner ignition, flame detection element flame signal is given to the pulse controller by detecting the flame, by maintaining the current the solenoid valve is open, maintain normal combustion burner.

Structure gas water heater solenoid valve

Gas Valve For Water Heater, mainly composed of a base, fixed core, coil, armature, the fixing member, wherein the fixed core package on the base, a coil positioned on the fixed core, the armature is supported above the fixed iron core, the movable adapter , the fixed member is fixedly connected with the base, is located above the armature, both sides of the fixing member extending second clip, Water Heater Gas Valves characterized in that: said second jaw extends further toward the desired direction extending portion, corresponding to the armature and the second clip portions extend each set at a point, respectively, and two clips holding a minute gap extending portion and the second pivot axis of the swing and the core of the basic concentric action.

The role of the valve

The role of the valve, there are two: one is cut off from acting, more choice of gate valves, gate opening and closing direction and generally fluid (gas, liquid) perpendicular to the direction adopted, such as hot air valve, cold air valve, combustion valves, gas burner valves, cold air gates, gas shut-off valve and the air shut-off valve. Another is the regulatory role, the choice of the valve plate can rotate the butterfly valve in the valve body, such as gas valve, air valve and mixed air control valve. Valve according to their different purposes and working conditions, choose a different material and structure.

Burner safety inspection - check the gas tube group

Burner safety inspection - check the gas tube group, confirmed manually switching regulator is sensitive, the gas burner safety valve handle is installed. See if the barometer is working properly. precise when adjusting the pressure of the gas burner shown to be very critical. Rotating low pressure and high pressure switch confirm their work. Gas valve connections need to be cleaned and lubricated, if the connection bond or too rough on the right accessories you need to replace. If the burner is installed removable conduit should also pay attention to cleaning.

Natural gas is the main gas burner source

Natural gas is the main gas burner source - natural gas as fuel for the burner, check the main natural gas valves to ensure that the line intact. Do not adjust the gas control valve, the gas company will assist cleaning, maintenance and adjustment of the primary air control valve. If there is sensing line  check it for damage. Filter - If the control valve is installed in front of the "y" type filter, pay attention purge control valve - control checks on the gas burner control valve, to see whether the adjustment bolt is easy to adjust. Make sure all exports and the screen is not clogged.

Gas burner valve features

PTA plant at risk pump shut-off Burner Valves are many kinds of pressure rating and gas Burner Valves are also many medium-caliber, to select different types of pneumatic actuators based on the actual situation, to ensure that the switch in the form of torque and pneumatic actuators to meet production requirements. Lower investment costs while at high risk of long-term pump inlet Burner Valve is fully open, fully closed state, the need to adjust to achieve the opening of the control Burner Valves, pneumatic actuator selection, but the failure rate is low, to meet the chemical plant safety requirements and production requirements.
 Through the transformation of a pneumatic actuator, can save a lot of Natural Gas Safety Valve labor costs, the original two-man operation, took nearly 20min of large diameter Burner Valves, now need only one operator, less than 20s time switch can be achieved. In dangerous situations, such as media leaks and fires when the Burner Valve can also be quickly cut off distance, in order to avoid the expansion of the accident.

Gas burner valve features

 PTA plant at risk pump shut-off Burner Valves are many kinds of pressure rating and gas Burner Valves are also many medium-caliber, to select different types of pneumatic actuators based on the actual situation, to ensure that the switch in the form of torque and pneumatic actuators to meet production requirements. Lower investment costs while at high risk of long-term pump inlet Burner Valve is fully open, fully closed state, the need to adjust to achieve the opening of the control Burner Valves, pneumatic actuator selection, but the failure rate is low, to meet the chemical plant safety requirements and production requirements.
 Through the transformation of a pneumatic actuator, can save a lot of Natural Gas Safety Valve labor costs, the original two-man operation, took nearly 20min of large diameter Burner Valves, now need only one operator, less than 20s time switch can be achieved. In dangerous situations, such as media leaks and fires when the Burner Valve can also be quickly cut off distance, in order to avoid the expansion of the accident.

High pressure burner valve

Burner Valves Application Features
Wire reinforced nylon resin elastomer burner valve is mainly used in the automotive, construction machinery, material handling equipment for high voltage transmission and transmission fluid, with good oil, heat and anti-aging properties, under pressure, pulse superior performance, can be used as high-pressure painting, pressure washer exclusive possession.
Fiber reinforced polyamide elastomer resin Gas Burner Safety Valve because of high pressure, high temperature, abrasion resistance, oil and a variety of chemical reagents and anti-aging, long service life, very versatile in various industries.
1, the car's braking system pressure;
2, the electric vehicle's steering system;
3, the brake pipe car control system;
4, the transmission control system;
5, engineering machinery, such as: excavators, loaders, cranes, hydraulic transmission systems and hydraulic control systems;
6, the hydraulic control system and hydraulic operation of mechanical processing equipment;
7, high-pressure spray pipe;
8, liquid resin delivery burner valve.

Burner valve has the following advantages

Burner valve has the following advantages: small fluid resistance, the pipe resistance coefficient equal to the same length. Simple structure, small size and light weight. Close and reliable gas safety burner valve sealing surface material widely used plastic, sealing, and has also been widely used in the vacuum system. Easy to operate, opening and closing rapidly, to facilitate remote control, simple structure, seals are generally activities, the removal replacement is more convenient. Burner valve exquisite appearance, aluminum alloy cylinder material selection, lightweight, convenient operation, the majority of users. Wide range of applications, from small to a few millimeters in diameter, large meters, from high vacuum to high pressure can be applied. Widely used in various sectors of petroleum, chemical, power generation, paper, atomic energy, aviation and rockets.

Indoor burner valves setting position

Indoor burner valves setting position
(1), before the gas meter;
(2), equipment and gas burners before;
(3), and the measurement points before ignition;
(4), gas Burner Valves setting before the vent pipe;
(5), the gas introduced into the tube.

Gas Burner Safety Valve for safety reasons

Gas Burner Safety Valve for safety reasons, in place for slightly corrosive gases, we strongly recommend:
1. double safety shut-off gas burner valves in the pipeline;
2. Install the valve leak detection devices;
3. Check the valve regularly irregular situation.

Gas Burner Valves characteristics

Gas Burner Valves characteristics
1) energy saving, safe, reliable, easy-control, can adapt to the pressure fluctuations, self-regulation so that combustion, high thermal efficiency;
2) The burner valves is equipped with a small fire. The boiler starts, the first point of a small fire, when a small fire to normal and stable combustion, automatic control system only open the main gas valve, fuel can enter the normal combustion boiler does not produce deflagration;
3) applies to natural gas, liquefied petroleum gas, coal gas, liquefied petroleum gas and other types of mixed gas.

Gas burners safety valve main functions

Gas Burner Safety Valve main functions: shock: in the case of the use of vibration, shaking exceeds a set value, which automatically cut off the supply Gas Valve, and automatically calls of alarm. Explosion-proof features: rubber hose off the gas. Leak detection function: This product can be used to test the leak metal hose or rubber hose and gas stove valves. Auto of alarm: automatic cut off gas supply after the distress, automatically of alarm. Our vast territory and large population, economic growth in the world and crown, increasingly improve people's living conditions, most people live without the device has been used a gas stove.

Gas burner safety testing:

Gas burner safety testing:
1. Installation of the new furnace, before commissioning the gas should be carefully detect whether the requirements of the burner; check supply line of gas burner safety valve opening and closing is normal, if they are easy to use and future maintenance.
2. Newly installed pipeline, should be carefully checked for reliability and pipe installation tightness of all piping.
3. User alone gasification station, to ensure that the amount of gas, the combustion gas parameters meet the safety requirements.
4. The operator carefully read the manual of the equipment, knowledge and proficiency in the safe operation of the method.
5. Before each turn to check the gas safety valve is open, the burner does not work otherwise.

Safety valve should note the following

Safety valve should note the following:
(1) there is gas in the container when liquid two-phase material safety valve should be installed in the gas phase portion.
(2) safety valve for venting flammable liquid outlet burner valves of the tank should be connected to the accident. When the discharge of the material is a high temperature fuel, its receiving container should have the appropriate protective equipment.
(3) general safety valve may be vented, the vent should be above the fire site operator 1 meter (m) or more and not toward 15 meters (m) or less, emitting sparks and high temperature equipment location. Indoor equipment, safety containers should lead roof vent and the roof above two meters (m) or more.
(4) When the inlet valve has cut off valve, cut off valve should be in a normally open state, and to be seals, to avoid mistakes.

Safety valve selection principles

Safety valve selection principles
1, air or other gas stove safety valve, generally used in the entire Kai spring safety valve;
2, high-pressure bypass valve steam generating equipment, generally used in a safe and controlled dual function of the Pilot Safety Valves
3, if the medium temperature is higher, in order to reduce the temperature of the spring chamber, usually enclosed safety valve when the temperature exceeds 300 ℃ and open valve temperature than 350 ℃ and should be used in safety valve with radiator;
4, if the medium is corrosive and should be used bellows safety valve, preventing the important parts due to media corrosion and failure.

Boiler safety valve is an important safety equipment

Gas safety valve is an important safety accessories pressure vessels and other equipment under pressure. Safety valve (also known as pressure relief valve) is automatically open and close depending on the pressure system operating pressure (temperature), usually installed in equipment pipeline protection system security or closed system. When the equipment or pipeline pressure or temperature exceeds a set pressure relief valve, pressure relief or cooling automatically open to ensure that equipment and the pipeline medium pressure (temperature) is below the set pressure (temperature), protective equipment and piping work, prevent accidents and reduce losses.

Gas Burner Safety Valve is the valve of a special branch

Gas Burner Safety Valve is the valve of a special branch of the family, it's particularity is because, unlike other gas burner valve switch just to play the role, more importantly protect the safety of the device. With the rapid development of China's economic construction, the project works with a pressure control equipment is increasing. Given the need for pressure relief devices, safety plays a crucial role in the protection device process.

Gas safety burner valve in a normally closed state

Gas Burner Safety Valve is opening and closing pieces by the external force in a normally closed state when the device or media pressure inside the pipe rises above a predetermined value, through to the outside of the system to prevent the discharge medium medium pressure piping or equipment exceeds a predetermined value special valves. Safety valves are automatic valves, mainly used in boilers, pressure vessels and piping, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role. Note the safety valve must be pressure tested before use.

Safety valve adjustment, maintenance and repair

Valve adjustments and repairs, including changing the set pressure, the safety valve shall be factory, factory authorized representative, or obtain the appropriate qualifications to perform the professional training of personnel.
Repair of critical spare parts used by the original safety valve provided by the manufacturer; if made by an authorized agency, shall meet the technical requirements of the original parts. The so-called "key components" refers to the part of its design have a critical impact on the performance of the situation to ensure that gas valve, comprising at least a nozzle (seat), valve, valve seat, valve core, the guide sleeve, stem or stem assembly, adjustment ring and spring. If you want to change the setting pressure relief valve, the valve design should ask the manufacturer for applicability of the changed working conditions. The manufacturer shall decide whether to replace the spring. Only meet the manufacturer standards spring before use. Changing mechanism responsible for setting the Gas Heater Control Valve should be installed to indicate the set pressure and other relevant parameters nameplate. Original logo has been changed to be crossed, but should remain recognizable.
The safety valve should at least be confirmed by the set pressure and tightness test.

Safety valve opening pressure adjustment:

① before the safety gas aluminum valves factory, should one by one to adjust the opening pressure setting value of user requirements. If the user make spring working pressure level, the general should be adjusted lower limit of the pressure level of the factory.
② user before the safety valve is installed on the protected equipment or before installation, you must re-adjusted at the installation site, in order to ensure that the setting pressure relief valve to meet the requirements.
③ spring working pressure level within the range of nameplate by the rotation adjustment screw to change the amount of compression spring can be adjusted to opening pressure.
④ Before the rotation adjustment screw, the Water Heater Gas Valves inlet pressure should be reduced to 90% of the opening pressure of the following, in order to prevent the valve is rotated when the rotation adjustment screw, which damage the sealing surface.
⑤ To ensure accurate opening pressure value, should make adjustments in the medium conditions, such as media type, temperature as close to the actual operating conditions. Media types to change, especially when the media is not the same accumulation of state (for example, from liquid into vapor), the opening pressure changes often. When the temperature increases, the opening pressure is generally decreased. It is adjusted at room temperature and used at high temperatures, the set pressure value at room temperature should be slightly higher than the required opening pressure. To what extent the valve structure and material selection have a relationship should be based according to the manufacturer's instructions.
⑥ conventional back pressure valve for holding additional occasions, when adjusting the opening pressure after the test (in this case the back pressure is atmospheric pressure), the setting value should be opening pressure required minus additional back pressure values.

Valve body material description

Flow characteristics near the quick opening of the gas brass safety valve in the top 60% travel approximately linear flow rate of 60% after little change. Pneumatic valve can be attached in the form of a feedback signal, stopper and locator devices to accommodate self-control, programmable or adjust the required flow. Safety valve feedback signals using non-contact sensor technology. The product film propulsion cylinder, replace the piston cylinders, piston rings ruled out easily damaged, causing leakage caused can not push the copper check valve opening and closing of the state. When the air supply fails, they can still hand wheel so that the valve opening and closing.
Valve body lined with corrosion-resistant and corrosion-resistant membrane in place of the valve assembly, the mobile use of the diaphragm regulatory role. Body material safety valve made of cast iron, cast steel, or cast stainless steel, and lined with a variety of corrosion or wear-resistant materials, rubber and PTFE membrane material. Membrane lining corrosion resistance, suitable for adjusting the acid, alkali and other corrosive media.
Simple valve structure, fluid resistance, flow capacity than other types of large valves with the specifications; no leakage, can be used for high-viscosity and have suspended particulate media regulation. The media and the diaphragm chamber isolation valve stem, so there is no packing medium does not leak. However, due to restrictions, pressure, temperature and poor membrane lining materials, generally apply only to the following 1.6MPa nominal pressure and 150 ℃.

Safety valve in the chemical industry advantage is reflected

In the chemical industry, the safety valve to ensure the effective use of staff's safety production, as well as their physical and mental health workers. And why only that chemical companies to choose safety valve it? Its advantages embodied in those areas? First, because the Gas Valve For Water Heater of Static-tight seal, with such safety valve is in operation, it is possible to completely prevent media leaks. Safety valve to use, no use of a separate lubricant and cooling water, reduce input costs, but also reduce energy consumption.
Safety valve is to synchronize the rotation of the coupling drag, friction and will not have any contact with. Gas Heater Control Valve to reduce the impact of vibration motor, and the impact caused when the vibration of the motor. In the medium through, the amount of lubricating the inner and outer magnetic rotor will be relative to the Pilot operated safety valve and the motor has a protective effect. Valve actuator in the case of work, but also may appear stuck phenomenon, magnetic rotator will automatically fall off, to protect the body does not hurt.

How to choose a safety valve? How safety valve selection?

This equipment should be determined according to the work environment.
Many gas Burner Valves classification, according to the structure to points, can be divided into a spring-loaded safety valve and lever safety valve. In case of large capacity requirements, harboring a pulse valve, also known as the pilot valve. According to
Emissions to sub-divided into a safety valve and inching valve. According to the structure and the loading mechanism to sub-divided into hammer lever safety valve, spring-loaded valve and pulse
gas safety burner valve three. By way of medium discharge points, it is divided into fully enclosed valve, semi-closed valve and open valve three. According to the size of the valve opening is divided into spring Enlight closed high-pressure safety valve two kinds of valves and springs. Not only to understand how the selection valve safety valve above classification, but also understand the media's safety valve, if there is corrosion, temperature, pressure, size (working pressure and opening pressure)

Safety valve is an important safety accessory

Boiler safety valve is an important safety accessories pressure vessels and other equipment under pressure. Barbecue Valve (also known as pressure gas patio heater valve) is automatically open and close depending on the pressure system operating pressure (temperature), usually installed in equipment pipeline protection system security or closed system. When the equipment or pipeline pressure or temperature exceeds a set pressure Bbq Gas Valves pressure relief or cooling automatically open to ensure that equipment and the pipeline medium pressure (temperature) is below the set pressure (temperature), protective equipment and piping work, prevent accidents and reduce losses.

Reflect the special nature of the safety valve

Safety valve is the Gas Burner Safety Valve of a special branch of the family, it's particularity is because, unlike other Gas cooker safety valve only acts as a switch, more importantly, play a security device. With the rapid development of China's economic construction, the project works with a pressure control equipment is increasing. Given the need for pressure relief devices, safety plays a crucial role in the protection device process.

Segmentation and differences introduction valve

A safety valve is a closed system with the valve opening and closing parts of its external force is normally closed by the state, when the medium pressure closed system has increased beyond the safety valve automatically open when a predetermined value, through to the outside of the system medium pressure to reduce emissions system to prevent damage in the system of high pressure medium system. Safety valves are automatic valves, mainly used in boilers, pressure vessels and air conditioning, solar pipes, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role.
Safety valve terminology:
(1) safety valve. An automatic Safety Valve Burner Valve . It does not use any force, but the use of the medium itself to discharge the grip of a nominal amount of fluid in order to prevent the system pressure exceeds a predetermined safety value; when the pressure is back to normal, the valve closed again and prevent the media continue to flow.
(2) direct loaded Gas Control Valve. A direct effect of the mechanical loads, such as hammer, lever and weight or spring to overcome the force of the valve under medium pressure relief valve produced.
(3) driving force assist device safety valve. The safety valve by means of a power assist device can be turned under pressure to open at lower than normal. Even if the auxiliary device failure, such valve can still meet the standards.

Protective effects of the safety valve

safety gas valve are automatic valves, mainly used in boilers, pressure vessels and piping, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role. Note the patio heater valves must be pressure tested before use.

The role of pulse valve

With the large capacity needs, harboring a pulse valve, also known as the pilot valve, the main Bbq Gas Valves and the auxiliary valve. When the pipeline medium pressure exceeds a predetermined pressure value, the auxiliary valve to open, the media along the catheter into the main Gas brass safety valve and the main valve is opened to reduce the media pressure increased.

Safety valve maintenance matters

1. To keep clean safety valve to prevent the valve springs, etc. are full of grease or dirt stalks corrosion, and prevent its adjustment screws are free to twist; to prevent the Copper Gas Valves discharge pipe is clogged oil or other foreign matter; always check seal is intact, the lever-type safety valve to prevent the hammer loose or moved.
2. light oil should be used to clean the safety valve, the valve must be re-commissioned after cleaning.
3. After the beginning of the operational phase of commissioning, should be carefully observed the operation of the safety valve.
4. Regularly check the operation of the Gas Cooker valves leaks, appropriate measures jamming and spring corrosion and other irregularities, and to observe the regulation of the adjusting ring nut and lock nut set screws are loose, if a problem should be taken .
5. safety valve leakage found signs should be replaced or maintenance. Prohibit the use of increased load (eg adjusting screw on the lever or safety valve lever and hang heavy loads over tighten the spring-loaded safety valve) methods to eliminate leakage.
6. The safety valve is installed outdoors should take appropriate protective measures to prevent fog, dust, rust and dirt and other dirt intrusion safety valve discharge pipe, when the environment is below zero degrees Celsius, freezing should take the necessary measures to ensure safety valve reliability.

Gas burner valve introduction

Gas Burner Safety Valve is an important part of the blast furnace steel smelting equipment. gas burner valve's main role is to blast heated to the required temperature, to improve the effectiveness and efficiency of the blast furnace. But in the smelting process often want to adjust the size of the gas flow in order to meet a variety of conditions for steel smelting. In order to achieve the purpose of freely adjust the airflow needed valves or gas burner valve open or closed. Wherein the gas burner valve open and close instantly generate a loud noise, and the noise has already become one of the three major threats to human survival pollution, noise of people have serious psychological and physiological effects. Hence, the need for gas burner valve acoustic simulation analysis, in order to get the noise level of the Gas Grill Control Valve, thereby determining the degree of noise hazards, and the main reason for the noise generated by the vibration, but also due to the valve or valve in the process of using high frequency belonging prone to damage the parts, so the gas burner valve said anything solid coupling analysis of noise and strength check has important practical significance.

     Author for the study of a gas burner valve acoustic structure interaction analysis, mainly from the modal shape and sound solid coupling analysis and other aspects of the area around the valve body and the fluid. Focus calculated valve and valve surrounding sound field, got within a certain area around the gas burner valve noise level in order to achieve noise reduction by changing the structure of the results, and expect the results of this calculation for the gas Burner Valve noise can have some reference significance.

High pressure multi-stage pressure regulator gas burner valve trim

    This adjustment member has an inner Range Top Burner Valve pressure drop across the gas burner valve will be divided into several smaller pressure drop and ensure that each of the smaller voltage drop on PVC> PV effect, which can prevent the generation of cavitation. Since the multi-stage vacuum dispersed stream power, thereby reducing the sound conversion efficiency.
Limiting orifice has increased partial pressure of back pressure device to ensure that PVC gas burner valve on the> PV, prevent cavitation generation. Due to the increased back pressure device, so that the sound spectrum partially transferred, to achieve the purpose of noise reduction.
  Can not prevent the occurrence of cavitation, but reduce its harm.
The cavitation bubbles within the contact surface with bubbles isolating gas burner valves and hardened gas burner valve and seat surface will be the impact of cavitation, while adding body outlet bushing in place to protect the bullied eclipse the impact site. gas Safety Valve Burner Valve at the outlet bushing plus body as a supplement designed to prevent the liquid collision in the gas burner valve body wall, protecting the gas burner valve by scouring the site, at the same time weaken some noise.
  Plus silencer to the partial pressure of the gas burner valve and sub-noise. This approach is essentially the cavitation condition into a flash conditions to deal with, so applications need to simultaneously trim do to protect hardened gas burner valve.
Epilogue
  Regulating gas burner valve serious noise pollution is not only the environment but will also control gas burner valve factory vibration, vibration can damage the gas burner valve spool and gas Burner Valve seat. The gas burner valve may cause damage to the regulator circuit fault, the interlock device substandard product failures and other issues. Therefore, effective control gas burner valve noise makes our production safer, better environment.

Cavitation burner valve noise control

By adjusting the Burner Valve surface hardening treatment can improve the hardness of the control burner valve, the control burner valve to enhance the ability of anti-flash "erosion", the corresponding noise will be reduced 5 ~ 10dB. To further reduce noise, can be used with the methods used are: ① improve the pipe wall thickness or adding sound insulation layer in the pipe wall. Regulating burner valve the same diameter, which each additional level of pipe wall thickness, the measured value of the noise can be reduced by about 2dB; ② pipe plus sound-insulating layer to reduce the substance of pipe wall thickness also increases a measure of noise transmitted to the environment; ③ the regulating Gas Top Burner Valve after the installation of the online muffler, online muffler can absorb some of the sound energy, and after the formation of back pressure burner valve, which can effectively reduce the noise level of about 25dB.

    Blocking flow flows through the burner valve when cavitation bubbles generated in the contact portion of the burner valve rupture, collapse of bubble energy will be released slowly tearing the material, and the parts in contact with the control burner valve leaving a rough surface similar to the slag . This process will produce noise emitted as gravel stream crossing the Stove Top Burner Valve.

    Cavitation There are two ways to control: the first is to completely prevent the occurrence of cavitation; the second is not to prevent the occurrence of cavitation, but reduce its harm.

Flash condition noise of gas burner valve

    Blocking flow through the regulator Stove Top Burner Valve when a flash occurs, the bubble generated downstream adjustment spool Gas burner valve will produce erosion by scouring the spool surface will smooth polished appearance, this process with great noise generation.

    From the mechanism of the Gas burner valve to flash the (PVC <PV and P2 <PV) adjustment, the flash can not be eliminated, only to find ways to reduce the harm flashing on the control Gas burner valve, thereby reducing noise. Commonly used method is the region of the material to be washed surface hardening treatment, surface hardening treatment methods include three types:

    (1) The seat and the gas safety burner valve surface spraying, can be sprayed tungsten carbide, chromium carbide or increase the hardness and other parts subject to erosion.

    (2) the surface of the Gas burner valve seat and gas Burner Valve body surfacing treatment, usually by welding increase the hardness of erosion site.

    (3) the Gas burner valve seat and Gas burner valve surface nitriding treatment to improve the surface hardness and wear resistance, corrosion resistance.

There are three main control gas safety burner valve noise sources

    (1) itself vibration noise. Medium flows through the control Gas safety burner valve spool will produce erosion, lateral movement of the spool produce unstable even resonate with the device. Due to the use of self-regulating Gas safety burner valve vibration is inevitable, so this kind of noise generation is also inevitable. Note that when you try to install the Gas safety Burner Valve upright on a horizontal pipe installed to reduce noise generated due to the spool instability, usually this kind of noise is very small, resulting in little impact.

    (2) Aerodynamic noise. When contracted flow medium flows through the Gas safety burner valve section, the flow cross section due to contraction of the flow path blocking sudden changes occur turbulence, while the medium flow rate is changed, the mechanical energy is partially converted liquid noise acoustic energy generated by known aerodynamic Science noise. Because fluid turbulence Gas safety burner valve when pressure is inevitable, so the aerodynamic noise can not be completely eliminated. Usually this type of noise level is small, resulting in little impact.

    (3) Hydrodynamic Noise. Fluid control gas safety burner valve in the rapid formation of blocking flow velocity. Blocking flow refers to the incompressible or compressible fluid flows through the Gas safety burner valve when the maximum achievable flow state. At a fixed inlet conditions, when the Gas safety burner valve before the pressure kept constant while gradually reducing the pressure after the Gas safety burner valve, the flow through the flow regulating Gas safety burner valve increases to a maximum limit, and then continue after the pressure reducing gas Burner Valves, the flow rate will not increase, the limit that is blocking traffic flow. Blocking the flow of liquid can easily cause flash cavitation, accompanied by strong noise generation, this noise is usually up to about 100dB, resulting in a large impact.

The positioner structure of smart burner valve

     When off, the positioner output is locked, pneumatic actuators maintained at the current position. That is, without any additional accessories, positioning itself to achieve the function off signal to secure his position.

     When off the power, shown in Figure 1, this protection scheme without power, so there is no break in power protection. Have no effect on whether the power pneumatic control Burner Valves position.

     (2) for the use of a nozzle flapper mechanism of smart burner valve positioner:

     Its power supply is connected in series with the input signal circuit burner valve, the off signal / power-up, the locator can automatically detect the abnormal pressure signal output to adjust the pneumatic control burner valve membrane compartment is locked, pneumatic adjustment Safety Valve Burner Valve position is held at fault . That is, without any additional accessories, positioning itself to achieve power, off the signal function to secure his position.

     The foregoing analysis, the structure itself, the use of the seismic performance of piezoelectric smart burner valve positioner burner valve structure better. When using the nozzle flapper mechanism smart Range Top Burner Valve positioner off signals more responsive and simple structure, less attachment, the probability of occurrence of failure in the course is also relatively small.

The work principle of gas safety burner valve

During normal operation, the gas supply pressure (ie, signal pressure air lock Gas safety burner valve) is greater than the set pressure of the air lock Gas safety burner valve, air piping smart Safety Valve Burner Valve positioner output and adjust the pneumatic control Gas safety burner valve diaphragm gas supply pipes are communicated , the control Gas safety burner valve operates according to the positioner output command.

     When breathe source, air pressure (ie, signal pressure air lock Gas safety burner valve) is less than the set pressure of the air lock Gas safety burner valve, pneumatic actuator air lock Gas safety burner valve action, smart Gas safety burner valve positioner output of gas supply lines and pneumatic control Gas safety burner valve adjustment the membrane cartridge is automatically cut off gas supply pipeline, namely the pressure adjusting Gas safety burner valve pneumatic control signal membrane cartridge is locked from outside sources on air, maintaining the original signal and the control Gas safety burner valve spring reaction force equilibrium pressure, thereby failure to achieve when air Gas safety Burner Valve pneumatic control Gas safety burner valve position adjustment is held in place before the failure.

     P / I conversion unit with a permanent magnet, coil, levers, nozzles and other parts of the electrical signal from the control system output signal is converted into a suitable pressure to push start Gas safety burner valve. According to the structure of the form, P / I conversion unit into the nozzle flapper, and the piezoelectric Gas safety burner valve spool type categories. Currently, the market mainstream smart Gas safety burner valve positioner in the I / P conversion unit mainly or piezoelectric nozzle flapper Gas safety burner valve. When breathe source, using the smart Gas safety burner valve positioner action of these two structures the same principle as described above. Using the time is now cut off the signal and power smart Gas safety gas Burner Valve positioners two different structures of the operation principle is analyzed separately.

The realization of gas burner valve

In the modern industrial processes, pneumatic control gas Burner Valve applications are very common, and its role is also very important, related to industrial production safety and economy. In actual production, pneumatic control Gas Burner Valve in accordance with the requirements of the process system needs to adjust various parameters to meet the needs of industrial production. Especially in many important aspects, the pneumatic control Gas Burner Valve if improperly adjusted it will destroy the entire production process and may cause huge economic losses. In general, the need to provide power when the pneumatic control Gas Burner Valve normal operation, the gas source, signal source, any loss of signal will cause improper operation of the Gas Burner Valve. Therefore, in practical industrial processes, commonly used three off protection to ensure reliable operation of pneumatic control gas brass safety valve.

     In engineering practice, when the power failure, breathe, off signals of these three failures in one or several cases occur, pneumatic control Gas Burner Valve fully open Gas Burner Valve automatically considered based process safety factors, the fully closed Gas Burner Valve or Gas Burner Valve failure to maintain position before - three off protection. Among them, close the Gas Burner Valve and open the Range Top Burner Valve body can be used in the cylinder pressure and the reaction force of the spring easily achieved. Three break protection to secure his position in functions to achieve it, it is more complex, and therefore, the paper analyzed and compared to the three projects off the protector of two widely used to secure his position in the functional program.

Technical difficulties of gas safety burner valve

     Dual blade superhard relatively common seal gas safety burner valve seal gas safety burner valve, Aluminum safety gas valve is suitable for high temperature, high pressure, high erosion and corrosion and other working conditions, the following technical difficulties in the design and manufacturing process.

     (1) Sealing pressure seal in the design of high pressure than when you should be appropriate to the requirements of high dimensional chain between the parts and improve the surface roughness.

     (2) the sphere surface with high hardness, high hardness and self-cleaning function of particles of various operating conditions, the gas safety burner valve opening of the process Gas Grill Control Valve will be particles adhere to the surface of a sphere, the sphere surface hardness requirements of the gas safety burner valve is closed when the state is higher than the hardness of the particles conditions , but also to "self-cleaning" function, otherwise damage the surface of the sphere, it will affect the sealing performance of the gas safety burner valve between the seat and the ball.

     (3) casting and forging more gas brass safety valve difficult to use a temperature higher than 600 ℃, castings and forgings prone to cracks, casting and forging process very demanding.

     (4) sealing surfaces are processed with a hard ball superhard material or surface hardening treatment, universal tool can not be processed, which can be processed even if the machining accuracy can not meet the requirements, but also requires processing apparatus has sufficient strength, and therefore to select the appropriate tool is very important.

The features of gas burner valve

     Dual blade superhard seal gas Burner Valves according to operating conditions required for high temperature, high pressure, corrosive and other media containing particles. The new structure has many seal gas burner valve operating torque, good sealing performance characteristics.

     (1) long-term high temperature can work at a high temperature above 600 ℃, the most suitable for high temperature operating conditions.

     (2) high pressure gas burner valve to work long-term rating at 25MPa pressure conditions.

     (3) corrosion to meet the special requirements of sulfuric acid, hydrochloric acid, nitric acid, acetic acid, and salt (sea), and other conditions of corrosive media.

     (4) wear can meet a variety of gas oven safety valve, mining and metallurgy, paper, coal chemicals, abrasive and polycrystalline silicon / silicone industry harsh, harsh working conditions in the wear resistance of special media.

Burner valve Works

     Pneumatic means, or other means for driving the upper end of the stem, the output torque transmitted to the ball Bbq Gas Valve, cause it to rotate 90 °, the sphere flow path coinciding with the center line of the burner valve flow path, a double doctor blade superhard seal burner valve opening action is completed, whereas the vertical, so that complete closure of the burner valve action, closed clockwise or counterclockwise turn. When the ambient temperature, the high-titanium spring preload sulfur-free flexible graphite sealing Gas Burner Safety Valve surface expansion; high temperature, high sulfur-free flexible graphite titanium expansion itself, a seal between the Gas Top Burner Valve and the burner valve seat. Ball seat and seal sealing surface at low pressure, by spring preload makes sealing surface; at high pressures, so that under the action of the spring preload and media pressure, both sealing surface.

Structural features of gas safety burner valve

     Metal sealing ball floating ball and fixed ball two structures, pole superhard sealing Gas safety burner valve from the main and auxiliary Gas safety burner valve, ball, seat, seat ring, seat support ring, the support sleeve, under the support shaft, bearings, brass aluminum safety gas taps sliding bearings and other components and the Gas safety burner valve stem. The overall use of two fixed dome design, the stem of coat type, dust and spray structure, packing compression plate structure using spring preload pressure ratio compression provides structure, spheres, hardened Gas safety burner valve seat sealing surface, the Gas safety burner valve aNTI media sedimentary structure, advanced Gas safety burner valve seat polyethylene years of pilot operated safety valve manufacturing experience and innovation double blade and a compression spring or disc spring dust protection design, a blade in the seat sealing surface, another scraper at the top of the seat. The difference between small-caliber ball floating ball gas cooker safety valve stem with a fixed formula for downloading anti-ejection structure, as well as innovative structural freely rotating ball rolling.