Solenoid valves manufacturers

As a professional solenoid valves manufacturers, JELPC has a wide range of valves designed for different needs and is widely used in many industrial control systems. AirTOP's solenoid valve includes zero pressure differential solenoid valve, plastic solenoid valve, high voltage solenoid valve and so on.

precision flow control valve

The main performance requirements of precision flow control valve:
When the pressure difference of the precision flow control valve is changed, the flow of the valve is small.
When the oil temperature changes, the flow rate is small.
The flow adjustment range is large, it is not easy to plug in the small flow, can get very small steady flow.
When the valve is fully open, the pressure loss of the valve is small.
Valve leakage is small.

Mini pneumatic cylinders

Introduction of mini pneumatic cylinders:
A cylindrical metal machine that guides the piston to reciprocate in the cylinder. The air in the engine cylinder is expanded to convert heat energy into mechanical energy; The gas is compressed by the piston in the compressor cylinder to increase the pressure. The shell of a turbine, a rotating piston type engine is usually called a "cylinder". The application field of mini pneumatic cylinders: printing (tension control), semiconductor (spot welding machine, chip grinding), automation control, robot and so on.

The mini cylinder is the cylinder that bore and stroke are both very small

The mini cylinder is the cylinder that bore and stroke are both very small. The function of the cylinder is to convert the pressure energy of the compressed air into mechanical energy. The drive mechanism acts as a linear reciprocating motion, swinging and rotating motion.
1. Cylinder is a cylindrical metal part that guides the piston to reciprocate in a straight line. Working fluid expands the heat energy into mechanical energy in the engine cylinder by expansion, and the gas is compressed by the piston in the compressor cylinder to increase the pressure.
2. The shell of a turbine, a rotary piston engine, also called a cylinder". The application fields of cylinder are printing (tension control), semiconductor (spot welder, chip grinding), automatic control, robot and so on.

Pilot pressure regulator pressure regulating steps

Pilot pressure regulator pressure regulating steps
1, First, close the gate valve before the pilot type pressure reducing valve, and then open the gate valve on the pilot type reducing valve to realize the low pressure state in the downstream.
2, the pilot valve regulator screw counterclockwise rotation to the top position, remember not to rotate clockwise, and then close the pilot valve on the back of the valve.
3, slowly open the pilot valve before the pilot valve, know the valve is fully open.
4, this time, the pilot valve needs to be turned clockwise, mainly to adjust the outlet pressure to the required pressure.
5, as in the adjustment of the pilot valve when the outlet pressure than the pressure set higher, it is necessary to stop the following operation, and then from the first step to readjust.

Pilot solenoid valve features

Pilot solenoid valve features:
Pilot diaphragm structure, low-function.
Protective diaphragm structure design, life expectancy doubled.
Piping can be installed at any angle, it is best to enhance the life of the horizontal tube coil up.
Coil protection class IP65.
Applicable medium: liquid, water, hot water, gas, oil, gas and so on.

Basic principles of solenoid valves

Solenoid valves are used when it is necessary to control fluids automatically. These are increasingly used in the most varied types of plants and equipment. The variety of different designs that are available allows a valve to be selected specifically for each application in question.

Construction
Solenoid valves are control units, which when energized or de-energized, cut or allow the passage of a fluid. The actuator works with an electromechanical drive. When energy is applied, an armature pivots against the action of a spring, and when it disappears, the energy returns to its original position.

Valve operation
Depending on the mode of operation, it is possible to distinguish between valves piloted internally or externally. A distinctive feature is the number of connection ports or the number of paths or ways of flow ("ways").

Direct action valves
With a direct acting valve, the seat seal is fixed to the solenoid core. In de-energized condition, the seat hole is closed, which operates when the valve is energized.

2-way direct acting valves
The 2-way valves are valves that close with an inlet port and an outlet port. In de-energized condition, the core spring, assisted by fluid pressure, keeps the valve seat closed. When energized, the core and seat are opened by the action of the solenoid coil. The electromagnetic force is greater than the combined spring force and the dynamic and static pressure forces of the medium.

3-way direct acting valves
3-way valves have three port connections and two valve seats. One valve always remains open and the other closed in de-energized mode. When the coil is energized, the mode is reversed.

Solenoid valves internally piloted
With direct acting valves, static pressure forces increase when the diameter of the orifice does, which means that the pressure forces become correspondingly larger. Internally piloted solenoid valves are used to switch to higher pressures in conjunction with larger orifice sizes; in this case, the differential fluid pressure performs the main job by opening and closing the valve.

Internally piloted 2-way valves
The internally piloted solenoid valves are adjusted with 2 or 3 ways. A diaphragm or piston provides the seal for the main valve seat. When the pilot valve closes, the fluid pressure is transmitted to both sides of the diaphragm. The effective net pressure force from below now raises the diaphragm and opens the valve. In general, internally piloted valves require a minimum differential pressure to ensure satisfactory opening and closing.

Some Problems in China 's Valve Industry

Domestic hardware industry, the trend of outward development of the valve business is more obvious, many enterprises within the industry, but because of low cost and intense competition, most companies rely on lower prices to get the market, so that corporate profits are very low , Basically can only achieve the maintenance of production, but it is difficult to make money in the state, the consequences are low product prices, low added value, low profits, companies do not have enough funds to continue to develop.
In the macroeconomic continued to optimistic about the situation, the hardware valve industry, most of the production and sales indicators have maintained a rapid growth, but due to the impact of price war, industry sales revenue and profits fell sharply last year. But overall, stainless steel solenoid valve industry concentration is relatively low, mainly in the production of low-end products. In the core technology, the domestic enterprises and the developed countries in the world there is still a certain gap.
At present, China's valve industry is still there are some problems, such as China's valve enterprises mainly to low-level, small-scale, family workshop-based enterprises. In the product, due to repeated investment, the introduction of technology is not enough, China's leading enterprises of the valve products is still low-quality mass products. It is understood that the current production of various types of valves in China, there are widespread leakage, internal leakage, the appearance of quality is not high, short life, the operation is not flexible and the valve electric devices and pneumatic devices are not reliable and other shortcomings, some products only the equivalent of the last century The international level of the early 80s, some high temperature and pressure and key devices on the need for the valve is still dependent on imports.
China's valve industry in the industrial structure, industrial valve industry chain, as well as the degree of specialization of the industry and foreign enterprises there is a large gap between the domestic pneumatic flow control valve product quality is low because the rapid expansion of the market, the original state-owned enterprises have Turn off and turn. According to a large market survey of air conditioning and refrigeration, although a number of township enterprises to develop rapidly, but because the township enterprises starting low, technical strength is very weak, poor equipment, most of the products are imitated production, especially for the drainage of low-pressure valve problems The above problems do not affect the future prospects of China's valve industry. This is mainly due to the support of national policy and the strong demand of the valve product market, especially the construction of the West-East Gas Pipeline, West to East, South-North Water Transfer Project requires a large number of valve products.
Until recently, Chinese valve manufacturers were also limited to some less profitable target markets such as Ethiopia, Sudan, Iran, Iraq and some Southeast Asian markets. These markets are small, the decision-making process depends entirely on the price, profit margins are limited. China's import valve manufacturers must pay attention to the undeniable fact that if they want to survive in the future, they must improve the performance of the previous downturn, access to large export manufacturing profits. The main reason for the low export earnings is that there are a lot of business opportunities in China's domestic market, and the quality of China's imported valves is not enough to sell overseas.

The reason why the pressure reducing valve can not be depressurized or depressurized

The regulator reduces the inlet pressure to a desired outlet pressure and relies on the energy of the medium itself to keep the outlet pressure automatically stable. If the pressure relief two way solenoid valve does not decompress or depressurizes and leads, it may be due to one of the following reasons:
1. Main valve or valve sealing surface with dirt;
2. The main valve or valve sealing surface damage;
3. The main or the china steam solenoid valve spring is tired or broken;
4. The feedback channel 3 hole is blocked;
5. Fatigue or damage to the diaphragm;
6. Piston cylinder wear or corrosion;
7. Piston ring groove and piston ring stuck;
8. Body cavity filled with condensate.

Exhaust valve installation precautions

1, the installation, and the vertical line within 5 degrees of vertical installation.
2, before installation, please fully clean the pipe.
3, in order to maintain water in the maintenance can be installed on the entrance side of the pneumatic solenoid water valves or circular state of the single coil solenoid valve (not spherical).
4, in order to prevent water from the air exhaust port leakage, please in the air exhaust port together to the drains, put on copper, plastic casing and other materials. These brass, plastic casing and other materials to the end of the drain with the overflow line to stay more than 55mm space. In addition, when using a plastic sleeve, fasten it with a fastening tape.
5, where it is possible to freeze, please take insulation measures to prevent freezing damage.
6, if the water from the air outlet leaked, please loosen the nut, twist the knob, stop the leak, the inspection.

Installation of solenoid valves

The type of 3 way 2 position valve is divided into many kinds, different types of solenoid valve, with the different places are also different. But the installation matters, although different, but roughly similar. Then the solenoid valve in the installation should pay attention to what matters?
Before and after the solenoid valve should be manually cut off the valve, while the bypass should be set to facilitate the maintenance of the solenoid valve in the event of failure. Solenoid valve is generally oriented, can not be installed, usually in the valve body with the direction of the flow of media, the installation should be installed in accordance with the direction of instructions. But in the vacuum pipe or special circumstances can be installed. Try not to let the solenoid valve for a long time in the power state, so easy to reduce the coil life or even burn the coil, that is, normally open, normally closed solenoid valve is not interchangeable.
Valve Solenoid Pilot in the installation of the time, first check whether the solenoid valve with the selection parameters consistent, if wrong, it will burn the coil. The supply voltage should meet the rated voltage range. General solenoid valve electromagnetic coil components should be vertical up, vertical installed in the horizontal pipe on the ground, if the space constraints or conditions must be installed side by side, the need to order when the selection. Otherwise it may cause the solenoid valve to not work properly. Take over the pipe before the rinse, the pipeline of metal powder and sealing material residues, rust and other clear. Should pay attention to the cleanliness of the media, if the media mixed with dirt, impurities and other obstacles to the normal operation of the solenoid valve, pipe should be installed filter or filter. If the media will be the phenomenon of water hammer, then you should use a waterproof function with a mercury hammer or take appropriate precautions.

Analysis on Application of Solenoid Valve in Cold Storage

Medical Check Valves as a hot industry in industrial production, its products have been widely used in a variety of medical, production, life and other aspects of the device. Of course, the solenoid valve as a production of a good helper, but also by the majority of customers love. Cold storage operation and production, the solenoid valve played a big role. In the cold storage, we often use two forms of solenoid valve, respectively, is a single type of solenoid valve and three-dimensional solenoid valve. In the installation of these solenoid valve, we have to pay special attention to some matters, or will seriously affect the realization of the various functions of the cold storage.
We should pay attention to these aspects of the matter, the first: solenoid valve and the main valve connection, do not force too much, otherwise the middle of the five-hole aluminum sheet pressure, resulting in smaller or blocked through-hole can not turn on The Second: In order to prevent damage to the internal parts of the heat, remove the valve body, and then welding. After welding, the welding slag and the oxide are cleaned to prevent the channel from clogging.
Third: the magnetic isolation sleeve flange and the air cylinder accessories seat to rely on the gasket seal, tighten the screw, the angle should be tightened, if the force will cause uneven leakage. Fourth: both ends of the catheter alignment, vertical connection side of the parallel, with spot welding to ensure that the solenoid valve seal. Fifth: check and remove the electromagnetic valve and the main valve connection parts of the sealing line of the burr or dirt, so as not to scratch the soft aluminum sheet caused by lax.
It can be seen that the manual air control valve in many production and life will often have a great effect, so in the installation and use of the process, I have to pay special attention to the details of the above problems.

How to improve the reliability of high temperature solenoid valve

High temperature mini air cylinders are used in different areas of the instrument, improve the performance of the machine running and productivity. It can be seen that our production life, high temperature solenoid valve has become a very worthy of our study of an aspect. So how should we improve the reliability of high-temperature air pressure fittings? We solenoid valve factory based on years of experience to tell you how to improve the high temperature solenoid valve several ways.
First, to ensure that the valve seat sealing. This type of solenoid valve piston, hedging, valve head with a special technology, so that these parts meet the sealing requirements. Secondly, we have to carry out its professional welding, to ensure that the quality of compliance. In the mechanical processing, the use of relevant professionals, professional equipment, professional process, to ensure that the strict quality requirements of parts. Finally, after we have completed the production of high-temperature regulator for air compressor, we have to carry out the corresponding experimental test and functional test. Through these processes and processes, we can ensure that this type of solenoid valve sales and consumption links.

How should we choose a miniature solenoid valve?

Many sophisticated devices and devices to achieve the function, often need a lot more compact, more durable, more intelligent components with the realization. Many designers in the design of some equipment, usually take into account the original reliability, lightweight, relative power consumption, relative flow and so on the parameters. In the design of the equipment, the function of the miniature solenoid valve is usually required to realize the effective operation of the machine. So how should we choose to miniature solenoid valve? 5v solenoid valve through our actual expertise and practical experience for everyone to solve problems.
First, in the selection of mini pneumatic cylinders, we have to ensure reliability and repeatability. The original reliability and repeatability, can make the equipment in the ongoing operation. This is the first factor that equipment designers often consider.
Second, to ensure a longer life. Continuous high service life also shows that components in the complex and more applications have better reliability. So life is also an important factor we can not ignore.
Third, make sure the components match. A good fit miniature solenoid valve is often present in the same product design that can reduce the risk of selection and achieve the maximum match with the various components of the application.
Fourth, make sure to meet the application of traffic. A good General Purpose Air & Water needs to optimize the use of electrical energy, but also to reduce the weight of the valve body, make full use of the battery or power generated by each ampere power.
Fifth, to ensure that the design more compact. Each valve size and weight are smaller, can be limited in the installation of space on the machine is more advantages.

Analysis on the Industrial Transformation of Solenoid Valve

Pilot Air Control Valves industry has always been the development of fast, broad market prospects of the industrial industry. With the development of recent years and technological innovation, the solenoid valve industry has also been the industrial structure of the above adjustment and progress. A lot of solenoid valve enterprises in order to meet the needs of the market above, and constantly promote their own business transformation. So what is the main reason for the industrial transformation?
Solenoid valve industry, an important reason for the transformation of products is the continuous innovation of new materials and solenoid valve industry, technological innovation. Solenoid valve selection, mainly with a new type of material to replace the metal material, to achieve the purpose of saving resources and reducing costs. And the new material in the wear resistance, corrosion resistance, and sealing the above are shown in addition to a powerful function, greatly extending the life of the solenoid valve. compressed air silencer technology research and development to expand the application of different materials in the solenoid valve industry, making the solenoid valve products continue to be further optimized process. Professional solenoid valve research not only contributed to the upgrading of the solenoid valve products, but also to the solenoid valve has been a better industrial restructuring, and promote the transformation of the industry. On the other hand, the market prospect of the valves for transportation has promoted the further upgrading of the industrial chain. Production structure adjustment often to meet the needs of the market, with the customer on the solenoid valve further technical requirements and performance, solenoid valve industry also had to carry out production adjustment. Since then, the transformation of the solenoid valve industry is also necessary, inevitable.
The transformation of the solenoid valve industry has promoted the transformation of new products and new technologies into standards, reduced the cost and improved the efficiency, optimized the function of the solenoid valve products and made the new products and new technologies quickly recognized by the building materials market and promoted the industrial progress.

Use of steam solenoid valve

In the economic law of the market environment, demand is often able to drive economic growth. pneumatic solenoid water valve is also the case, often can drive the development of this industry. Solenoid valve industry in recent years the development of space is very large, whether it is the Chinese market or the international market, the purchase of different types of solenoid valve is very large. In these types of 3-Piece Combination Units, the steam solenoid valve has undoubtedly become a lot of manufacturers competing to buy a product. Because the performance and properties of steam solenoid valves are often able to adapt to many different operating environments. And its use performance more and more toward the professional, general, technology and the direction of development.
Why is the steam solenoid valve able to receive such a welcome? Mainly because it has a strong production performance. Its wear-resistant, heat-resistant, corrosion-resistant, resistant to condensation of the four obvious effect, so that production more efficient. This is also a big part of its popularity. So the use of steam three way positions is very large range by the customer's favorite and.

pneumatic flow control valve came out in the 1950s, with the rapid development of science and technology, production technology and product structure of continuous improvement, in a short period of 40 years, has rapidly developed into a major valve class. In industrialized countries, the use of ball valves is increasing year by year.
In China, the ball valve is widely used in petroleum refining, long-distance pipeline, chemical, paper, pharmaceutical, water, electricity, municipal, steel and other industries, occupies a pivotal position in the national economy. It has a 90 degree rotation action, the swivel body is a sphere, with a circular through hole or passage through its axis.
The high temperature solenoid valve is mainly used in the pipeline to cut, distribute and change the direction of flow of the media, it only needs to rotate 90 degrees of operation and a small turning torque can be closed tight. Ball valve is most suitable for the switch, cut off the valve to use.

Installation must be careful to avoid cracking the brittle material produced by the solenoid valve. Before installation, the solenoid valve should be a check, check the specifications model, identify whether the damage, especially for the stem. But also turn a few times to see if the skew, because the transport process, the most vulnerable to hit the stem. Also remove the debris from the valve.
   When the stainless steel solenoid valve is lifted, the rope should not be on the hand wheel or stem, so as not to damage these parts, should be on the flange. For the solenoid valve connected to the pipeline, be sure to clean. You can use compressed air to blow iron oxide chips, mud, welding slag and other debris. These debris, not only easy to scratch the sealing surface of the solenoid valve, which install the screw solenoid valve, it should be sealed packing, wrapped in the pipe thread, do not get the solenoid valve, so as not to accumulate the valve, affecting the media circulation.
    When installing the flange two way solenoid valve, pay attention to the symmetrical even tightening bolts. Solenoid valve flange and pipe flange must be parallel, the gap is reasonable, so as to avoid excessive pressure on the solenoid valve, or even cracking. For the brittle material and the strength of the solenoid valve is not high, with particular attention. To be welded with the tube solenoid valve, should first spot welding, and then the closure of the full open, and then welded to death.

Ball valves are: floating ball valve, fixed ball valve, ball valve, V ball valve, three ball valve, stainless steel ball valve, cast steel ball valve, forged steel ball valve, ash ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve Ball valve, solder ball valve.
Floating ball valve
Ball of the ball is floating, under the action of the medium pressure, the ball can produce a certain displacement and pressed on the outlet side of the sealing surface to ensure that the export side of the seal. Floating ball valve structure is simple, good sealing, but the ball to bear the working medium of the load all passed to the export seal, so consider the sealing material can withstand the work of the ball media load. This structure is widely used in medium and low pressure ball valves.
2. Fixed ball valve
Ball of the ball is fixed, after the pressure does not produce movement. Fixed ball valve with a floating seat, by the media pressure, the high temperature solenoid valve suppliers seat movement, so that the seal on the ball to ensure that the seal. Usually with the ball on the lower shaft with bearings, operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, in recent years there have been oil seal ball valve, both in the sealing surface between the injection of special lubricants to form a layer of oil film, which enhances the seal, but also reduces the operating torque , More suitable for high pressure large diameter ball valve.
3. Elastic ball valve
The ball of the ball is elastic. Spherical and direct acting solenoid valves price seat seals are made of metal materials, sealing a lot of pressure, relying on the pressure of the media itself has been less than the requirements of the seal, you must exert external force. This valve is suitable for high temperature and high pressure medium. The elastic sphere is an elastic groove at the lower end of the inner wall of the sphere, and is elastic. When closing the channel, use the wedge of the stem to keep the ball open and seal against the seat. Before turning the ball, loosen the wedge head, and the sphere restores the original shape, so that there is a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface.

The role of the trap is to automatically discharge the steam Pilot Air Control Valves and equipment generated in the condensate and non-condensable gas, and can effectively prevent the steam emissions, to ensure the normal operation of steam equipment. In the chemical design, often encountered steam traps (also known as traps), but because the trap system is only a small attachment, and often not the designer attention. According to reports, China's annual about 300 million sets of traps in use, but up to 70% to 75% of the poor use, which in addition to the middle of the trap itself because of the reasons, the main reason is in the system design and selection There is a problem.

The trap can not discharge condensate, the trap for a long time without response, the 4A Air Control Valve surface temperature drop, which is the trap can not open the state.
The reason for this failure:
1, the filter or pipe is impurity, stolen goods blocked, condensate can not flow into the steam trap. The filter, tubing and valve dirt must be cleaned.
2, the amount of condensate discharged from the trap is very small or the action interval length, then it is necessary to replace the small capacity of the trap.
3, do not drain condensate water trap is hot, steam or secondary steam produced by the phenomenon of steam plug Once the steam is condensed, the steam seal that disappeared. This is due to the installation of steam traps caused by unreasonable, the middle of the entrance pipe can not have place to stay condensate.
4, water attack float damage water can not be floating, should replace the new float.
5, the pressure is too large. The pressure of the steam equipment exceeds the maximum working pressure of the trap so that the trap can not be opened. Replace the working pressure of the trap or adjust the working pressure to reduce the steam equipment.
6, water heater coil vacuum, hinder emissions. Install a vacuum damper between the heat exchanger and the pneumatic solenoid water valve.
How to determine the trap is different from the different methods of judging the trap, the simple method requires very professional experience, of course, there are many professional methods of traps, which require some equipment. Since you say that the condensate is serious, that is, the trap does not drain, or the displacement is lower than the amount of condensate produced, which can be seen in the field is very simple. However, there are many reasons for the serious cause of water hammer, may be improper selection, the installation is wrong, there is no filter before the filter or filter failure, resulting in trap clogging.

China's refrigeration accessories electric valve market prospects can be expected

Industry stakeholders said that the valve in the industrial process, mostly used to control the flow of various fluids and flow, such as water, oil, chemical liquids, based on the parameters of temperature, pressure and flow. The factory commonly used 5v Series Solenoid Valve with pressure relief valve, pneumatic temperature control valve, solenoid valve temperature system, proportional control valve temperature control system, temperature control valve and other types. In the selection of various types of automatic valve, should consider the type of heat engine, the required accuracy, control valve quality, pressure drop, flow and its structure, failure rate, manufacturers credit and after-sales service and other factors, in order to achieve economic and practical purposes.
In terms of the product itself, the electric valve is easy to install, the failure rate is low, and meet the advantages of industry automation needs, the industry is more cost-effective choice. Because the use of the traditional traditional pneumatic valve, will inevitably have piping, solenoid valves and compressors to become, and the 5 way 3 position valve is driven by a motor, easy installation, and the installation of electric valve with the original control of the original line can save other Cost of expenditure. In addition, the motor-driven way to open and close more smoothly, no instantaneous impact is too large shortcomings, the failure rate can be greatly reduced. With the continuous development of market science and technology, but also to the high-tech, high parameters, strong corrosion resistance, high life direction.
At present, China's valve industry and foreign valve industry gap is more obvious, there are four major differences: First, the gap between the technological innovation capacity; Second, the processing technology on the gap; Third, the quality management and equipment gap; Fourth, Management gap. This also allows us to see their own shortcomings, in order to find gaps and problems in essence, so as to improve and improve.

Pneumatic Quick Cut Ball Valve Overview:

V-type pneumatic fast cutting ball valve with leaf spring loaded movable seat structure, seat and the ball will not produce jamming or detachment and other issues, sealed and reliable, long service life. V-shaped incision between the core and the metal seat between the shear effect, especially for fiber, micro-solid particles and slurry and other media. Control of pulp in the paper industry is particularly advantageous. The opening and closing parts adopt the V-shaped ball short structure, completely solve the problem that the single coil solenoid valve cavity is easy to deposit the medium. Fully open when the valve flow capacity, the pressure loss is small. Compact structure, versatility, flow characteristics for the approximate percentage, adjustable range, the maximum adjustable ratio of 100: 1. Worm gear steam solenoid valves manufacturers also has a precise adjustment and reliable positioning function. V-type ball valve for Class150 ~ 600, PN1.6 ~ 10.0MPa, operating temperature ≤ 200 ℃ on a variety of pipelines, used to adjust the pressure in the pipe network pressure and flow, use different materials, can be applied to water, Steam, oil, nitric acid, acetic acid, oxidizing medium, urea, ammonia brine, and water and other media. The actuator is equipped with pneumatic piston actuator such as DOVNO series according to user requirements.

Gate valve applications:

DOVNO gate valve opening and closing parts is the gate, the direction of movement of the gate and the fluid direction is perpendicular to the use of the cut-off medium, the full flow through the full flow through, this time the minimum pressure loss of media operation. precision flow control valve are normally suitable for applications that do not require frequent opening and closing, and are kept fully open or fully closed, and are not suitable for use as adjustment or throttling. manual air control valve fluid resistance is small, the applicable pressure, the temperature range is large, the medium flow direction is not restricted, the sealing performance is good. Widely used in food, medicine, petroleum, chemical, natural gas, steel, environmental protection, paper and other transportation pipeline to do the media cut off or circulation.

Principle and Material List of Manual High Performance Butterfly Valve

High-performance butterfly valve with ultra-unique product structure, a special floating seat design, according to the direction of the pressure source, automatically adjust the seat position, to achieve the effect of double-sided valve pressure, and increased seat life, More than 500,000 times, the flange solenoid valve shaft through a special dust-proof design to prevent the fluid into the valve shaft caused by the solenoid throttle valve shaft stuck, high-performance butterfly valve according to different conditions, the choice of different materials and performance, seat using PTFE, RTFE, PEEK, METAL and other materials pumping, for petrochemical, oil refining, air separation, CDA and other conditions.

Manual high-performance butterfly valve main features:

1. Unique structure, double-sided pressure design, the valve strength in line with: ASME B16.34, API 598
2. Full range of pressure ring patent structure, ultra-reliable sealing.
3. A full range of anti-static guide device structure, ultra-small operating torque.
4. In accordance with the explosion-proof certification: ATEX 94/9 / CE Group II Category 2 GD
5. Full caliber through the API 607 ​​fire test requirements, special conditions safe fire, long long service life.
6. Metal seat leakage rating in accordance with ANSI FCI 70-2-2003 Table 1 CLASS IV
7. relief valve transportation shaft escape in line with EPA Method 21 test and TA-LUFT emission requirements (OPTIONS)
8. Connection method has a folder, single flange type.

Double flap check valve advantages

A. short structure, small size, light weight, for the valve installation, handling, storage and pipeline layout to bring great convenience,
And can save costs.
B. Reduced line vibration, in order to minimize the line vibration or eliminate line vibration, the flow must have the opportunity to countercurrent as soon as possible before closing the pneumatic solenoid water valves.
Both flap check valves each have only a full structure to check the size of the valve flap one morning, and it is experienced by reducing the fluid resistance and can be more
Move quickly to the closed position. They have only half the radius of the conventional check valve. Its half distance from the open position to the leading position of the closed position,Thus reducing the travel time to 50%
C. Reduced water hammer, the whole structure of the swing pneumatic control components price contrast, double flap-type flap valve has been greatly reduced the weight, it can slam the
Water hammer phenomenon to a minimum.

Electric valve operation principle

The high-quality standard air cylinders is used to adjust the medium flow, pressure and hydraulic. According to the adjustment part of the signal, automatic control valve opening, so as to achieve the media flow, pressure and hydraulic adjustment. JELPC Automation Components sub-electric control valve, pneumatic control valve and hydraulic control valve. Control valve by the electric actuator or pneumatic actuator and control valve composed of two parts. The electric control valve is usually divided into two types: single-seat type regulating valve and straight-through two-seat regulating valve. The latter has the characteristics of large circulation capacity, unbalanced operation and stable operation, so it is usually especially suitable for large flow, Leak less occasion.
    The flow capacity Cv is one of the main parameters of the selection of the Japan Series Cylinder. The circulation capacity of the control valve is defined as: when the pressure of the valve is 0.1MPa and the fluid density is 1g / cm3, The flow rate of the diameter control valve, known as the flow capacity, also known as the flow coefficient, expressed in Cv, the unit is t / h, the liquid Cv value calculated by the following formula.

Principle and setting of safety valve

The steam solenoid valves is a safety device that prevents the pressure device and the container from causing the pressure to rise or the pressure inside the container exceeds the limit. Safety valves are pressure vessels, boilers, pressure pipes and other pressure systems using a wide range of safety devices to ensure the safe operation of the pressure system.
When the container pressure exceeds the design requirements, the safety valve automatically open, exhaust gas reduction device over the high pressure to prevent damage to the container or pipeline. And when the pressure inside the container down to normal operating pressure, that is automatically closed to avoid the container overpressure to discharge all the gas, resulting in waste and production disruption.
air flow control valves mainly by the valve seat, valve (valve core) and loading mechanism of three parts. Some of the valve seat and the valve body is a whole, and the valve body is assembled together, it is connected with the device. The valve flap is often accompanied by a stem, which is fastened to the valve seat. The above valve is the loading mechanism, the size of the load can be adjusted. When the pressure inside the device within a certain working pressure range, the internal medium on the valve above the force is less than the loading mechanism attached to the valve above the force, the difference between the valve and the valve seat between the sealing force, So that the valve discs pressed the valve seat, the equipment can not be discharged media. When the pressure inside the device exceeds the specified working pressure and reaches the opening pressure of the safety valve, the force exerted by the inner medium on the flapper is greater than the force exerted on it by the loading mechanism, so that the valve flap leaves the valve seat, the safety valve opens, The medium is discharged through the valve seat, if the safety valve displacement is greater than the safety of the equipment discharge, the equipment pressure is gradually decreased, and through a short period of time after the exhaust, the pressure is back to normal working pressure. At this point the internal pressure on the valve above the force is less than the loading mechanism applied to it above the force, the valve plate and pressed the valve seat, the media stopped discharging, the equipment to maintain normal working pressure to continue to run. Therefore, the safety valve is through the valve on the media force and load mechanism of the force of the length of their own closed or open to achieve the purpose of preventing overpressure equipment.

Product technology into the constraints of China's valve product development

Prospective Industry Research Institute data pointed out that in recent years, China's rapid development of the valve industry, raw materials and labor costs and other factors. Product exports and market share continues to expand, and gradually become the industry's important production base and the main product sales market. China's control valve factory many enterprises, small-scale, the lack of core competitiveness, and low concentration of enterprises, difficult to influence in the international market, to a large extent restricted the healthy development of the direct acting solenoid valves manufacturers china industry.
It is understood that although a number of township enterprises to develop rapidly, but because the township enterprises starting low, technical strength is very weak, poor equipment, most of the products are imitated production, especially for the drainage of low-pressure valve problem is serious but the above problems do not affect China 's future prospects of the valve industry.
This is mainly due to the support of national policy and the strong demand of the valve product market, especially in the past few years, the West-East Gas Pipeline Project, West to East, South-North Water Transfer Project requires a large number of valve products. Low profit Last year, China's valve industry import and export volume reached 24.1 billion US dollars, an increase of 28.2%, of which exports amounted to 22.4 billion US dollars, up 29.3%; total imports of 20.134 billion US dollars, an increase of 27% But also because of the high-end technology and foreign manufacturers still exist compared to the larger gap, the next period of time, product technology will become a bottleneck restricting the development of China's valve products.
Until recently, pneumatic control components suppliers were also limited to some less profitable target markets such as Ethiopia, Sudan, Iran, Iraq and some Southeast Asian markets. The small size of these markets, the decision-making process depends entirely on the price, profit margins are limited.
China's import valve manufacturers must pay attention to the fact that if they want to survive in the future, they must improve the performance of the previous downturn, access to large export manufacturing profits. At present, the main reason for the small export income is that there are a lot of business opportunities in China's domestic market, and the quality of equipment imported from China's imported valves is not enough to sell overseas.

Set the safety valve should pay attention to the following points:

(1) the container with gas, liquid two-phase material when the safety valve should be installed in the gas phase.
(2) When the shut off solenoid valve is used to vent the flammable liquid, the outlet of the safety valve should be connected with the accident tank. When the material is high temperature combustible material, the receiving container should have the appropriate protective equipment.
(3) the general safety valve can be vented on the ground, venting should be more than 1 meter above the operator and should not be toward 15 meters within the open fire location, sparks and high temperature sprinkler equipment. Indoor equipment, container pneumatic solenoid valve vent should be led out of the roof, and more than 2 meters above the roof.
(4) When the safety valve inlet has a blocking valve, the blocking valve should be in the normally open state, and to be sealed, so as to avoid mistakes.

high temperature solenoid valve refers to the closure (disc or butterfly plate) for the disc, around the valve shaft rotation to achieve the opening and closing of a valve, mainly in the pipeline from the cut and throttling. Butterfly valve opening and closing parts is a disc-shaped disc, in the valve body around its own axis of rotation, so as to achieve the purpose of opening or closing or adjustment. Butterfly valve fully open to the whole is usually less than 90 °, butterfly valve and butterfly rod itself does not have self-locking ability, in order to butterfly plate positioning, to install the worm on the stem reducer. The use of worm reducer, not only can make the disc with self-locking ability, so that the butterfly plate to stop at any position, but also improve the valve operating performance.
The characteristics of the special three way solenoid valves can be high temperature, the pressure range is also applicable, the valve nominal diameter, the valve body made of carbon steel, valve plate sealing ring with metal ring instead of rubber ring. Large-scale high-temperature butterfly valve made of steel welding, mainly used for high-temperature media, smoke duct and gas pipeline.

precision flow control valve is the pipeline medium pressure as the driving force, the opening and closing, regulating the valve. It consists of a main valve and attached pipe, needle valve, ball valve and pressure gauge and other components, according to the purpose of use, different functional sites, can be transformed into remote control float valve, pressure reducing valve, slow closing check valve, flow control valve , Pressure relief valve, hydraulic electric control valve, emergency shut-off valve. The pilot valve with the media level and pressure changes and action, due to a large number of pilot valves, can be used alone or in several combinations, you can make the main valve to the water level and water pressure and flow, etc. to separate and complex adjustment function The But the main valve body similar to the valve, the valve is fully open, the pressure loss is much larger than other valves, and the opening degree of each loss coefficient is close to the closed state, the more the surge, the greater the diameter of the valve Significantly. With the above characteristics of the valve, in the action near the valve to accelerate, prone to the impact of water hammer, close to the full closure, the valve moves the more slowly the better, so the valve can be set on the throttle device. In addition the pilot valve throttle and action part to try to avoid the installation of small diameter openings, so as not to plug. If necessary, add filters, regular maintenance and set the bypass pipe. industrial automation and control valve diaphragm type and piston type two, the same principle, are above the downstream pressure difference as the driving force, a pilot valve control, so that the diaphragm (piston) hydraulic differential operation, completely by the hydraulic automatic adjustment, so that the main The valve flap is fully open or fully closed or in a regulated state. When the pressure water in the control chamber above the diaphragm (piston) is discharged to the atmosphere or downstream low pressure zone, the pressure value acting on the lower part of the valve flap and below the diaphragm is greater than the above pressure value, thereby pushing the main valve valve Open position: When the pressure inside the control chamber above the diaphragm (piston) is in the middle of the inlet pressure and the outlet, the main valve disc is in the regulated state and its adjustment position depends on the combination of the needle valve and the pilot valve in the conduit system Control effect. The pilot valve can open or close its own small valve port by changing the downstream pressure, thus changing the pressure value of the control room above the diaphragm (piston) and controlling the adjustment position of the main valve disc. Can be used for living water supply, fire protection systems and industrial water supply systems.

The industrial automation and control is evolved from the plug valve, the ball valve opening and closing pieces as a sphere, the use of the ball around the axis of the valve rotation 90 degrees to achieve the purpose of opening and closing.
Ball valve in the pipeline is mainly used to cut, distribution and change the direction of media flow, designed to V-shaped opening of the ball valve also has a good flow regulation. The ball valve only need to rotate 90 degrees of operation and a small turning torque can be closed tight. The fully equal body cavity provides a very small, straight passage for the medium. Ball valve is not only simple structure, good sealing performance, but also in a certain range through the smaller size, light weight, less material consumption, installation size is small, and the driving torque is small, easy to operate, easy to achieve fast opening and closing, easy to operate And maintenance, suitable for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions of the media, such as oxygen, hydrogen peroxide, methane and ethylene. single coil solenoid valve body can be the whole, it can be modular.