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.