For Extended media applicable to the scopes

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The automatic control valve, solenoid valve and the other is the medium viscosity applies to a narrow range of air, water, steam, oil and media for the pilot solenoid valve and its structural parameters are different; generally are not common. ZDF multi-function shuttle valve  only use a small screw, but do generic of gas, water, oil, but also the viscosity of the oil the scope of application greatly widened, popular.

Open adjustable in the moving and the solenoid valve of the kiln

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Often also want to use it both manually, as a standby when the power outage or failure. More shuttle valve  technical manual devi ce only to manually open the valve or manually off quick exhaust valve , two fully equipped known as the full manual. Manual device can be preset for the valve opening, generally manually only the maximum or minimum valve opening preset complete manual can be preset maximum or minimum opening. ZDF-solenoid valve is a completely manual class. Other models solenoid valve may be needed, with a simple manual device.

Gas solenoid valve due to the structural adjustment of China s fuel

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The proportion of fuel gas rising demand for gas solenoid valve is also growing. Gas, natural gas, industrial gas, city gas, liquefied petroleum gas, such as a good variety of impurities and corrosion varied, the requirements of the valve is not the same. Moreover, the difference between pressure levels, compressed natural gas as high as 21 ~ 25Mpa gas appliance pressure as low as 2Kpa. China were already mature product. This CE series gas solenoid valve has been exported to the European Union. It is worth mentioning that the dual-fuel vehicles in China with sound environmental regulations continue to spread to 12 cities have converted a few thousand cars, and now multi-selection of complete sets of imported fuel for the device, the shuttle valve  with the supporting imports. Fact, these solenoid valve is not foreign solenoid valve professional company production and performance test results are not all in compliance with the relevant technical standards of China s gas industry. The company already has a more reliable and more affordable dedicated quick exhaust valve  is gradually replacing imported electromagnetic valve.

For Steaming range of solenoid valves

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We must first solve the problem of high temperature, sealing materials, conductive and magnetic materials should be selected in particular. Corrosion of the steam pipe is more powerful, to be taken seriously. More important is that there are a lot of condensate in the steam pipe in the factory after work, the shuttle valve  in the gaseous and liquid fluids through the action reliable, its delivery inspection Road have strict procedures. This company ZQDF-type solenoid valve, 92 years as a national new product, the well-user tests in recent years has launched a compact CC series of steamquick exhaust valve .

Water solenoid valves

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Water solenoid valve is always considered the most simple, but in reality the water is divided into several categories of tap water, industrial water, industrial wastewater, irrigation water, seawater, corrosion, cleanliness of the differe nt should be the choice of different electromagnetic valve. The water valve is most common, but use different performance requirements of the valve is not the same. For example, fire electromagnetic valve, operating reliability is essential in case of failure lead to disastrous consequences. Even ordinary manual valves for long periods of opening and closing, it is difficult to quickly open. In recent years, high-rise buildings springing up, our fire solenoid valve technology also will mature. Another example, the waterworks must solenoid valve for siphon pipe, solenoid valve, but pressure state, but also in the vacuum state work reliably, there must be no internal leakage, and the cleanliness of the water is not high status , should remain flexible movement. Such waterworks shuttle valve  in the hundreds of waterworks. Water Association (IWA) as the only recommended by the solenoid valve. In addition, the sprinkl er quick exhaust valve  with the development of China s agricultural and garden industry gradually been applied.

Oil solenoid valve oil

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Variety of types of seal technology is the key one. Oil and rubber just a class name, different oil or even the same kind of oil contained in the impurities on the need to choose different oil and rubber. For example, the ability of leaded gasol ine is not necessarily resistant to unleaded gasoline. In recent years, with the increase in the sales of dedicated quick exhaust valve , the life of the special oil resistant rubber is also rising. The viscosity of oil vary widely, are required to use a different structure of the solenoid valve. High-viscosity oil is also often in the high temperature state of flow, so the solenoid valve will solve the problems of high temperature. For the fuel needed to meet explosion-proof requirements. In recent years, the Company launched the gasoline, diesel, heavy oil and other kinds of special shuttle valve , has been widely applied.

Air conditioning with electromagnetic valve air-conditioning

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Sub-system heating and cooling. Refrigerant changed significantly in recent years to gradually reduce ammonia and Freon, lithium bromide and other new types of refrigerant is gradually increasing, related to sealing, corrosion, life and other issues require carefully selection of appropriate design and advanced technology. It is worth mentioning is air-conditioned mainly by adjusting the air flow to control temperature and humidity, and continuous adjustment of the valve flow is not absolutely necessary. Now that the quick exhaust valve -free air-conditioning systems are also available, but problems such as condensation dripping while a reprimand. Therefore, the structure is simple, inexpensive solenoid valve is the most live choose. Due to the impact of foreign traditional, complex structure, the torque is difficult to control the electric valve the country is still a lot of selection. 1997 Chairman Mao Memorial Hall maintenance projects to save the remains of such high-precision air-conditioning system has selected the company s air conditioning shuttl e valve  to obtain satisfactory results. Secretary of the CPC Central Committee and Memorial Council also recently personally honor certificate sent to the Company, in fact, the recognition should be the courage and wisdom of the engineering staff.

Solenoid valve technology developments related to social progress

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Only of the scientific papers of the past simple to talk about technology, involving social management is easy to be a laughing stock. Today, scientific and technological development depends and to promote social progress and come to a consensus. I engaged in scientific and techno logical inventions and management, and talk a bit about that is necessary. Solenoid valve solenoid valve is directly related to the production and enterprise security industrial products, poor quality of our country because of the shuttle valve , the occurrence of a boiler explosion, fire failure and other serious accidents. The former Ministry of Machinery already solenoid valve as a certification of the licensed production and sale of products. Domestic holder of an enterprise to ten. Compared to large companies and foreign professional, technical and economic strength are significant gaps. After the reform and opening up, the rise of private technology enterprises, has the United States, Japan, Europe approved by the patent, the product has gradually entered the markets of developed countries, the economic strength of SMEs is increasing more than their foreign counterparts. But up to dozens of unlicensed production enterprises, fake and shoddy depriving many designers mistakenly believe that the quality of the quick exhaust valve  does not pass. The progress of the industry in recent years as a welcome change.

Solenoid valves selection is more complex

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More professional technical management personnel. The solenoid valve is never included in the automatic control of professional textbooks, many people think the selection is very simple, experienced designers know this gadget to be taken seriously. Solenoid valve on the structure and principles of classification there are dozens, then consider a variety of technical parameters, cross-combinations of up to thousands. Design and procurement personnel gradually learned the correct choice in the dazzling, In addition to the collection and sample data, but also directly in consultation with the manufacturing companies, large or important economic and technological strength and technology to ensure the ability to have personally inspected the production plant, in-depth to their original users, to learn about the use of the product. Everyone had economic accounting, but this is by no means a simple quote comparison. In addition to affect the price of the performance of safe, suitable, durable, beautiful, with the performance and cost of the entire automatic control systems, piping systems, it has become a comprehensive knowledge. The Company has a technical service department attaches great importance to pre-sales consulting, modeling and piping system design and other services. Highly re sponsible of the design, procurement and management staff is carefully chosen for their dedication to promote and facilitate the continuous development of the shuttle valve  technology. Solenoid valve in China to learn from foreign advanced technology, continuous innovation in the development of its own. Its development to encourage people to constantly update our concepts. Meanwhile, the only social rule of law more robust and more to improve the quality of the people, the quick exhaust valve  technology to develop faster and better.

The Control device and method of the solenoid valve in the industrial motor vehicle

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 Used to prevent the solenoid excitation current heating method and device. When the hydraulic cylinder out and indent, the controller instructed the high drive to enter an adjustable current to the solenoid, the solenoid valve to move to the connected position. Subsequently, the controller instructed the high drive to enter a steady current to the solenoid, shuttle valve body remains in the connected position. Adjustable current and stable current pulse. Stabilize the current duty cycle is less than the duty cycle of the adjustable current.

Solenoid valve features and future developments

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Solenoid valve as an actuator for automated instrumentation in recent years, the amount is increasing. Analysis of the main features of the pneumatic accessory , and focus on the application point of view, for a brief overview of the mature technology developments, streamlining, intelligent, universal, were made by the special direction of the investigation, and slightly affect the solenoid valve technology The social dimension of development of some of.
    (1) The system is simple, they take the computer, the price is low and modest.

     Solenoid valve structure is simple, low price, easy installation and maintenance compared to other types of control valves and other actuators. More significant is the automatic control system is much simpler and a much lower price. As the jelpc  switching signal control and industrial computer connection is very convenient. Popular in today s computer prices an era of declining, the solenoid valve is even more obvious advantages.
 
   &n bsp; (2) action express, power tiny, lightweight shape.

     Solenoid valve response time can be as short as a few milliseconds, even if the pilot solenoid valve can be controlled within tens of milliseconds. Forming the circuit, and more responsive than the other automatic control valve. Properly designed solenoid valve coil power consumption is very low, the case of energy-saving products; can also be done simply trigger movement, and automatically maintain valve position, and usually is not power consumption. Solenoid valve small size, saving space and lightweight appearance.
 
     (3) leakage of the block must drain easily controlled, safe to use.

     Inside and outside the leaks endanger the safety factor. Other automatic control valve will usually stem extends from the electric, pneumatic and hydraulic actuators to control the spool to rotate or move. This is to solve the external leakage problems caused as a result of the valve stem seals; only the solenoid valve is used to seal the casing of the magnetic isolation of the iron core electromagnetic masterpiece completed, there is no dynamic seal leakage so easy to block absolutely. Electric control valve torque is not easy and prone to leakage, and even pulled off the stem head; the structural type of the solenoid valve is easy to control leakage, until reduced to zero. Therefore, the solenoid valve to the use of special security, especially for corrosive, toxic or high and low temperature media.

For The new release of the isolation solenoid valve

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The global sensor leading brands Gems grand launch of the K series isolation solenoid valve. The product is an inert material, with minimal internal volume and volume, very suitable for the selection of the OEM manufacturer of medical or life sciences. The structure can be flexibly configured the service life of the K-series jelpc  for up to 20 million times, can be easily integrated into the component or the entire fluid system. A variety of interface options make it very flexible; side interface, the bottom of the interface and valve installation.

    Whether you need corrosion resistance, chemical inert valve or pneumatic accessory  can be compatible with the particulate matter, and K series solenoid valves are your first choice. For high purity applications or in the transport of highly corrosive media, the fluid path can be completely inert materials high. Particulate matter in the fluid will usually damage the plastic seat (PTFE), and K series of special rubber diaphragm valves do not have this problem, more reliable performance.

&nb sp;   This product is suitable IVD biochemical analyzer, classification, five categories of blood analyzers, clinical diagnostics, life sciences, mass spectrometry, and ultra-high purity water treatment systems, liquid chromatography, laboratory automation and other fields.

The principle and structure

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Has been developed a variety of principle and structure of the form of electrical / fluid or electric / gas high-speed switching solenoid valves have applications, but in the country has not yet reached the stage to promote it. As for seve ral typical structure described below.
(1) of the electromagnet, and a combination of slide valve. This form is used more in the switch, coil electromagnet drive the movement of the poppet jelpc , the poppet valve to open, the spring on the armature, the poppet valve to close.
(2) floating plate and nozzle combination. Usually have two coils to control the floating plate movement, thus changing the distance between the nozzle flapper, on or off, to form different working conditions.
(3) The combination of the torque motor and putting the ball valve. Torque motor-driven putter action to control the start of the ball valve.
(4) of the piezoelectric high-speed switchingpneumatic accessory . Electricity made by the PZT piezoelectric crystals and other materials - displacement converter. Inverse piezoelectric properties of piezoelectric crystals (inverse piezoelectric the imposition of a certain voltage, the material will produce a shift in one direction) to promote the spool work. Due to the displacement limit of the piezoelectric material, the valve flow is usually very small, but the relatively high frequency.
The working principle, Solenoid valve and solenoid valve is no essential difference, but high-speed switching solenoid valve due to its quality of the spool and travel is very small, and thus to a very high response rate to track the control signal, to facilitate computer and a variety of single-board computers for real-time control.

To improve the accuracy of control measures

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(1) to compensate for the lag time. First determination of the actual lag time of the valves in the system, and then in determining the tone rate in advance to the tone pulse width broadening of some de gree to offset the lag time to eliminate the zero dead zone.
(2) differential PWM control. The so-called differential PWM control, the basic principle is the jelpc  of the two switches at the same time given a certain time difference of control signals, the time difference in the implementation of the piston on both sides of the differential pressure can be controlled very small time difference, the resulting pressure waveform can be very narrow, thereby improving the linearity of the system of duty.-Δp (open rate - pressure) characteristic curve. The experiments show that this method can not only eliminate the dead zone phenomenon, but also improve the linearity of the characteristic curve.
(3) the development of high-performance, high-speed switchingpneumatic accessory . According to reports, West Germany, has developed in the laboratory at frequencies up to 2 00 Hz high-speed switching valve, a number of universities and manufacturers in Japan are being developed PZT piezoelectric element driven by ultra-high-speed switching valve. It is reported that the frequency up to 2 kHz, but has not been batch-to-market.

Digital control of the hydraulic actuator

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Hydraulic actuator and electric actuator is higher than the output power of unit mass of an increasingly wide range of applications in mechanical and electrical integration. High-speed switching pneumatic accessory to control the hydraulic actuator, may a lso constitute a digital servo control system. Figure 2 for an example. Figure, the implementation of the displacement of the piston rod can change the swash plate angle to change the output flow of the pump or the motor speed, motor speed and the actuator piston rod displacement feedback to the computer through the sensor and A / D conversion, the computer will be the value of these feedback Comparison of amplification, respectively, to control two high-speed switching valve, according to the PWM control, these two valves control the flow of the actuator chamber to control the displacement of the piston rod, and ultimately control the motor speed to the target. Of course, if the actuator shown in Figure 2 to control a jelpc , can also control the working cylinder piston protrusion.
 

Logic valves meet the flow control

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High-speed switching valve allows the maximum traffic because of their structural constraints, a smaller, but if used as a pilot jelpc  to control a logic poppet valve, there may be a larger flow propor tional control. Figure 3 for its hydraulic schematic diagram, when the PWM control to change the tone frequency of the high-speed switching valve, the poppet valve opening rate will be changed accordingly, therefore, flows from the P port of the T-port traffic will be essentially the high-speed switching valve tone proportional to the rate. Japan does not extend beyond the two companies have been stereotyped products, flow control up to 20 L / min. As needed, normally closed type shown in Figure 3 can also be designed as a normally open type. Switching pneumatic accessory  and logic valve poppet valve structure, the fluid cleanliness requirements low, the leak is relatively small, is the application of this valve on the rise in the operating agencies on some Japanese agricultural machinery, down, stop the action to electronic control and automation.

High-speed switching valves and logic valves with large flow proportional control

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Solenoid valves and servopneumatic accessory , proportional valves compared to anti-pollution ability to use and easy maintenance. Th erefore better able to adapt some of the control accuracy is not required, the occasion of the poor working environment. Such as excavators, cranes and other construction machinery, transportation machinery, the use of high-speed switching jelpc  to achieve digital control and remote control

Solenoid valve and thermocouple upgraded to improve

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Adhere to the idea of ??specialization, brand operation, product design focuses on user-friendly and practical, firmly grasp every detail, strive for perfection, leading the development of th e industry and the trend of integrated kitchen line as the "Integrated kitchen Gree for three consecutive years, has been selected as the "integrated stove top ten brands - the brand of choice. The Jindi integrated kitchen pneumatic accessory  and thermocouple improvements to upgrade to further improve the sensitivity and reliability of Jindi ignition and flame failure protection, by the Purchasing Department and Zhejiang Precision Electromechanical Co., Ltd. actively communicate and multi-stakeholder coordination, electrical Conte and the three purchase agreement was finally reached in the near future, to improve thejelpc  and thermocouple assembly is mainly the core parts, and improved products to help improve the Jindi integrated stove ignition and protect the reliability and sensitivity, improve the product stability of the overall stove and practicality. Pre cision Co., Ltd. invested by the Three production capacity and sales revenue to reach world-class, professional production of gas with automatic flame failure protection device and automatic water heater thermostat, professional international brand accessories (such as: Panasonic, Sanyo , Electrolux, Whirlpool, Bosch, Siemens, U.S. General, can, forest, etc.). The upgrade proved once again that the the Jindi pursuit of the perfect quality, step by step with the international component makers across the board standards, thus ensuring the stability of the integrated kitchen.

Production dens of counterfeit solenoid valve pneumatic components

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Fenghua Branch Trade and Industry law enforcement officers in the village of Fenghua Yuelin street out of the soil Tai., Successfully destroyed the dens of a counterfeit production "AirTAC" b rand solenoid valves pneumatic components. Law enforcement officers on the spot in accordance with the law seized more than 2000 "AirTAC" jelpc  pneumatic components finished, over 3600 semi-finished products, as well as over 30,000 of the box.
In the morning, Fenghua Branch Trade and Industry inspection brigade is Yuelin streets out of the soil Tai Village to perform the task of routine inspections, law enforcement officers at the entrance to the village three-storey brick structure houses closed the door, and came again and roar of machinery. When law enforcement officers to nearby houses, the sound of the machine suddenly disappeared. Suddenly came from the houses within a burst of dogs howling, which aroused the vigilance of law enforcement officers. They pushed open the door to enter, found that seven workers were being assembled "AirTAC" pneumatic acc essory  pneumatic components. Law enforcement officers to the person responsible Danmou show their law enforcement certificate, and the scene to start the inspection of law enforcement.
Law enforcement officers at the scene found the solenoid valve pneumatic components semi-finished products, and later found inside in the attic filled with a box marked "AirTAC English words, as well as counterfeit solenoid valve pneumatic components finished. Also found that the mountains of the box in the bathroom.
The investigation, Danmou originally a rural electrician in October this year from its cousin the hands of 25 million production facility disk down the production of fake the Jad polite Action components. According to Danmou accountable, has sold more than 50,000 counterfeit products.
, Fenghua Branch Trade and Industry in accordance with the law involved people Danmou , law enforcement officers are for further investigation.

To brief electromagnetic pulse valve selection method

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 In the selection of the electromagnetic pulse valve, the output voltage can meet the requirements, the cleaning effect of the pulse three way position  has a larger impact in the selection of the control device, in particular, DC24V control device, to determine whether the controller sent enough voltage and current is very important, now two cases to analyze:

A high-power tube output of the control instrument in the output voltage at both ends of the electromagnetic pulse solenoid operated valve  controller output voltage and high-power tube voltage drop, so the analysis to control the instrument circuit design parameters to determine whether side of the chaos of DC 24V is very important.

2, the relay output control device of the control instrument because the voltage output through the relay contacts, there is no pressure drop, so as long as the power sector of the controller design fair, the normal output is no purpose.

Germany BURKERT solenoid valves three classification and function

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  Food-grade stainless steel solenoid valve. 2, high-temperature fluids: To select a high-temperature electrical materials and sealing materials, electromagnetic solenoid operated valve , but also to select the piston structure type. 3, fluid status: gaseous, liquid or mixed state, in particular, is a diameter greater than DN25 order must separate. 4, the fluid viscosity: usually 50cSt the following arbitrary choice than this value will have to use the solenoid valve of the high viscosity.

      The pressure parameters of the principles and structure of species 1, Pressure: This parameter is the same as the meaning of other general purpose valves, according to the pipe nominal pressure to decide. Working pressure: if the low pressure must be selected direct action or step-by-step principle of direct action; minimum working pressure is acting the 0.04Mpa more than straight, step-by-step direct-acting, the pilot can be selected. Electrical voltage specification should be preferred AC220V, DC24 is more convenient. Continue to work the length of time normally closed, normally open, or sustainable power, if the open time or open the relevant time, then select normally closed type. 3, but some conditions for security protection, such as furnaces, kilns, flame monitoring, you can not select normally open, to be elected to the long-term power type. Environmental requirements to select the auxiliary function of explosion-proof, non-return, manual, water fog, water washout, diving

   An explosive environment: selection of the appropriate explosion-proof level of the three way position  (my company has: dIIBT4, dIICT5, ExmI/IIT4). 2, when the fluid inside back, you can choose my company OK71-N, OK72-N series with non-return function solenoid valve. 3, when the scene manual operation of the solenoid valve, you can choose my company OK71-S, OK72-S series with manual features solenoid valve. 4, open-air installation or dust more occasions should be us ed to waterproof, dust-proof varieties (protection class IP54 or more). 5, for the fountain must be submersible type solenoid valve (protection class IP68 and above). 1, normally open when the solenoid valve open for a long time, and duration of the excess time off should be used.

Food-grade stainless steel solenoid valve

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2, high-temperature fluids: To select a high-temperature electrical materials and sealing materials, electromagnetic three way position , but also to select the piston structure type. 3, fluid status: gaseous, liquid or mixed state, in particular, is a diameter greater than DN25 order must separate. 4, the fluid viscosity: usually 50cSt the following arbitrary choice than this value will have to use the solenoid valve of the high viscosity.

Explosive atmospheres

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Must choose the appropriate explosion-proof level of the three way position  (my company has: dIIBT4, dIICT5, ExmI/IIT4). 2, when the fluid inside back, you can choose my company OK71-N, OK72-N series with non-return function solenoid valve. 3, when the scene manual operation of the solenoid valve, you can choose my company OK71-S, OK72-S series with manual features solenoid valve. 4, open-air installation or dust more occasions should be used to waterproof, dust-proof varieties (protection class IP54 or more). 5, for the fountain must be submersible type solenoid operated valve  (protection class IP68 and above). 1, normally open when the solenoid valve open for a long time, and duration of the excess time off should be used.

Briefly steam solenoid valve principle structure and instructions for use

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   Steam solenoid valve instructions for use in daily life we ??come into contact with steam is often divided into two, a boiler steam - saturated steam heat and power plant out of steam - su perheated steam, saturated steam temperature and pressure are relatively stable, the temperature is below 200 ° C, working pressure of less than 1.6Mpa 2, the superheated steam temperature and pressure changes a high base temperature up to above 400 ℃, working pressure of less than 4.0Mpa steam for the first, we usually choose soft sealing steam three way position  is as follows:

      The structural characteristics of this valve is constituted by the Vice valve and the main valve parts, the second electromagnetic valve open pilot operated valve heat: electromagnetic part of the seal part of a special high temperature electrical materials and sealing materials, and application of a variety of separated thermal wear measures: a reasonable selection, and the valve cup and guidance suites clever use of fluid lubrication to reduce wear and tear, and improve the life of r esistance to the condensate: the condensate of the steam pipe is an important factor to affect the action of steam solenoid valve, the valve are not subject to condensation water affect the other uses - soft sealing steam solenoid valve solenoid valve can be widely applied in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery, appliances, surface treatment and scientific research departments, as well as bathrooms, cafeteria, air conditioning automatic control system.

      For the second steam, we usually will choose the hard sealed steam solenoid valve as follows: the structural characteristics of the metal seal and improve the reasonable use of the product temperature and selection of the life of the valve cup and guidance suites cleverly using fluid lubrication, other purposes - to reduce wear and hard to seal steam solenoid operated valve This product is universal media a wider scope, can be used in fluid such as water, light oil, heavy oil, non-corrosive gases and steam. Such as power plant exhaust pipe drain system and the exhaust system of the evaporator, mainly double-automatic regulation and remote control of the media in the pipeline. Normally closed type of work status - power open, power off the normally open type - power outages open, turn off power

Steam solenoid valve instructions for use

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Everyday life we ??come into contact with steam is often divided into two types of boiler steam - saturated steam, thermal power plants out of steam - superheated steam, saturated steam temperature and pressure is relatively stab le three way position, the temperature is below 200 ° C, working pressure of less than 1.6 mpa superheated steam temperature and pressure changes base of temperatures up to 400 ℃, working pressure of less than 4.0Mpa For the first steam

The second steam

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We usually choose hard sealed steam three way position as follows: the structural characteristics of the metal seal, and improve the ration al use of the product temperature and selection of the life of the valve cup and guidance suites cleverly using fluid lubrication to reduce wear for other purposes - this product common media a wide range of hard sealing steam solenoid operated valve can be used in fluid such as water, light oil, heavy oil, non-corrosive gases and steam. Such as power plant exhaust pipe drain system and the exhaust system of the evaporator, mainly double-automatic regulation and remote control of the media in the pipeline. Normally closed type of work status - power open, power off the normally open type - power outages open, turn off power

For Digital Scroll solenoid valve

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Digital Scroll in the external solenoid valve is a specially designed long life three way position , shall instead of the standard solenoid valve. The life of the valve of 40 million c ycles, equivalent to 15 years of continuous running. Digital Scroll all the components are able to withstand long-term continuous operation of loading and unloading.

Briefly steam solenoid valve instructions for use

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Steam solenoid valve instructions for use in daily life we ??come into contact with steam is often divided into two, out of a boiler steam - saturated steam, heat and power plant steam - superheate d steam
1, the saturated steam temperature and pressure is relatively stable, the temperature is below 200 ℃, working pressure lower than 1.6Mpa
Superheated steam temperature and pressure changes in a high base temperature up to 400 ℃, working pressure of less than 4.0Mpa
Steam for the first one, we usually will use the soft-sealing steam three way position  as follows:
Structural characteristics of
The valve is constituted by the two major components of Vice valve and main valve solenoid valve Pilot-secondary open valve
Heat: the electromagnetic part of the seal part of a special high temperature electrical materials and sealing materials, and application of a variety of insulation measures
Wear: a reasonable selection of the valve cup and guidance suites clever use of fluid lubrication, reducing wear and increased life expectancy
Resistant condensate: the condens ate of the steam pipe is an important factor to affect the action of steam solenoid operated valve, the valve from condensate
Other uses - soft sealed steam solenoid valve
This series solenoid valve is also widely used in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery, appliances, surface treatment and research departments, as well as bathrooms, cafeteria, air conditioning automatic control system.
For the second steam, we usually choose hard sealed steam solenoid valve as follows:
Structural characteristics of
Metal seal, the use of the product temperature and service life
Reasonable selection of the valve cup and guidance suites clever use of the fluid lubrication to reduce wear
Other purposes - hard to seal the steam solenoid valve
This product is broader universal medium, can be used in fluid such as water, light oil, heavy oil, non-corrosive gases and steam.
Such as power plant exhaust pipe drain system and the exhaust system of the evaporator, mainly double-automatic regulation and remote control of the media in the pipeline.
Working status
Normally closed - power open, power outage shut down the normally open type - power open, power off

Superheated steam

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Above the high base temperature of temperature and pressure changes of up to 400 ° C, working pressure of less than 4.0Mpa
Steam for the first one, we usually will use the soft-sealing steam three way position as follows:
Structural characteristics of
The valve is constituted by the two major components of Vice valve and main valve solenoid valve Pilot-secondary open valve
Heat: the electromagnetic part of the seal part of a special high temperature electrical materials and sealing materials, and application of a variety of insulation measures
Wear: a reasonable selection of the valve cup and guidance suites clever use of fluid lubrication, reducing wear and increased life expectancy
Resistant condensate: the condensate of the steam pipe is an important factor to affect the action of steam solenoid operated valve, the valve from condensate

Application and comparative analysis of the exhaust valve in the project

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 Exhaust  jiaerling pneumatic life in order to solve a series of accidents in the pipe network, to improve water suppl y efficiency, it is necessary to pipeline gas emissions. Article needle

On this theme, the hazards of the pipeline gas is described, and propose effective solutions. New generation of exhaust products - Chi

Exhaust the king of performance, and efficacy are summarized. Keywords: water efficiency, burst pipes, water hammer, exhaust troubled water industry staff s

There are three: First, the urban water supply, the low efficiency of water supply pipe network. Caused the main reason is there are a large number of the row of gas pipeline form

Wall into the air bag floating in the pipeline, the pipeline over the flow cross-section smaller, reduce the effective water supply, water supply and low efficiency. Lead to individual towns the Home

China to open the tap, first gas emissions, and then out a trickle. Inconvenience to the residents, but also to some extent from the shadow

Echoing the economic benefits of water supply enterprises. I had heard similar complaints. Second, the common water supply pipeline accidents - burst pipes. In fact

Some ways, the main reasons that led to the burst pipe and pipe siltation gas. Pipeline gas rich in oxygen, attached to the pipeline

Wall, the oxidation of iron pipe, generating rust off gradually, lead to wall thinning, can no longer afford the corresponding nominal pressure caused by explosion

Tube. This is a long-term oxidation. Due to the presence of airbags, fast switching pneumatic auto drain or pump start and stop can also be caused by burst pipe, which is due to open

Off valve or pump start and stop changing the medium flow rate, the pipeline pressure value-added, the gas compressibility characteristics of the stress concentration

Generates a high voltage to the airbag squib. According to the case of burst pipes, air bag heigh t of the diameter of a quarter of the burst pipe danger point, but also

Is the critical point of the air bag. Burst pipes in public water at the same time, also caused some social impact. This is also the water supply enterprise is responsible for

Headache problems. Pipeline accident - water hammer. Long-range pressure on water supply works in the pipeline, flow, Header Pipe

Speed ??is generally larger trunk pipeline ups and downs along the way point, long-distance water transfer projects often occur in various water column separation and resulting in drying up the bridge the water hammer

. And water column separation is precisely the pipe somewhere in the pressure drops below the vapor pressure when the water temperature, liquid water has occurred vaporization.

The gas will not be discharged in two water column re-bridge has a direct water hammer characteristics, due to the violent collision between two jets of water wi ll produce

The high pressure of the drying cavity to bridge the water hammer. Its harm may be caused by the pumping station flooded, even a large number of long-term unattended pipeline leakage

Water, flooding irrigation area of ??fertile farmland

Steam liquid solenoid valve uses

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ZQDFY series steam fluid actuator pneumatic auto drain is used for industrial process automation and control systems, it can automatically open electrical signal

Or close the valve off the fluid medium in the pipeline or flow regulator to control w hich times the same temperature, flow, pressure and other parameters

The number of automatic regulating or remote control.

This series solenoid valve products can be widely used in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery,

Appliances, surface treatment and other facilities of production and scientific research departments, as well as bathrooms, cafeteria, air conditioning and other people s daily lives, ZQDF series is mainly used

Control of air, steam, gas and other gaseous media; ZQDF-Y series jiaerling pneumatic for tap water, distilled water, frozen brine,

Electroplating waste and other liquid media, but also for the viscosity is less than 4 ° E oil.

4WE10Y33/CG24N9K4 electromagnetic valve

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Structural characteristics of liquid-gas pneumatic auto drain:

The solenoid pilot valve open structure, can operate even greater pressure. The diaphragm seal, sensitive, reliable opening and closing.

There are both normally closed and normally open.

The fluid temperature must be less than the calibration temperature of the jiaerling pneumatic. Liquid-gas solenoid valve uses:

Apply to water or liquid, gas medium, the automatic control of level, concentration, flow rate, measurement, or discharge cycle two

Type off switch.

Urban water supply

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Low efficiency of the supply pipe network. Caused the main reason is the pipeline row of gas, the formation of the air bag floating in the pipe wall to make the pipe

Over-current cross-section smaller, reduce the effective water supply, water supply and low efficiency. Lead t o individual towns, residents open the tap, first gas emissions

Put, and then outflow trickle. Inconvenience to the residents, but also to some extent affected the economic benefits of water supply enterprises. Author jiaerling pneumatic

Had heard similar complaints pneumatic auto drain.

Common water supply pipeline accidents pipe explosion

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In fact, in some ways, the main result in burst pipes and the the siltation gas pipeline. Pipeline gas rich in oxygen, attached to the

Pipe wall, the oxidation of iron pipe, genera ting rust off gradually, lead to wall thinning, can no longer afford the corresponding nominal pressure cited

The Exploder tube. This is a long-term oxidation. Due to the presence of airbags, fast switching jiaerling pneumatic or pump start and stop can lead to burst pipes, by

Change the switch pneumatic auto drain or pump start and stop the medium flow rate, the pipeline pressure value-added, the gas compressibility characteristics, stress

Centralized to a gasbag to produce high pressure and burst pipes. According to the case of burst pipes, air bag height to diameter of a quarter pipe explosion danger point

Critical point, that is, the airbag. Burst pipes in public water at the same time, also caused some social impact. This is also the water supply enterprises

Responsible for the headache.

Pipeline accidents water hammer

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Long-distance pressure water supply works in the pipeline, flow, Header Pipe speed generally higher trunk pipeline along the ups and downs over a long-distance water transfer
Projects often occur in various water column separation and cause Cavities Collapsing water hammer. The water column separation precisely because somewhere in the pipeline pressure dropped when

When the water temperature below the vapor pressure of liquid water vaporization. The gas will not be discharged in two water column re-bridge, due to jiaerling pneumatic

The violent collision between two jets of water will produce high pressure drying cavity with direct water hammer characteristics and then to bridge the water hammer. It might be more harmful

Caused by the pumping station flooded, and even monitor a large number of long-term leakage of the pipeline, flooding irrigation a large area of ??fertile farmland pneumatic auto drain

Piston solenoid valve failure and troubleshooting

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   A fault: power does not move Cause Analysis: The power supply wiring, poor contact; changes in supply voltage is not within the allowable range; for coil short-circuit

Or burn approach: The power cord; adjust the voltage within the normal range; replace the coil

      Failure two: open valve, fluid can not cause analysis: does not meet the fluid pressure or differential pressure; fluid viscosity or temperature

Complied with; the spool and the moving core around mixed with miscellaneous dirt, impurities; filter in front of the valve or pilot valve plug the hole; use when operating frequency is too high or life

Maturity approach: adjust the pressure or working pressure, or replace the product suitable; replacement of suitable products; cleaning of internal pneumatic auto drain before

Filter valve must be installed; timely cleaning the filter or jiaerling pneumatic  guide hole; reelection product model or replaced with new products

     Failure: Off valve fluid can not be cut off Analysis: the viscosit y of the fluid does not comply; fluid temperature does not comply; spring deformation or Shou

Life expired; seat defects or adhesion stolen goods; gasket prolapse `defects or deformation; balance hole or orifice clogged; the frequency of use

Too high or the end of life treatment methods: replacement of the right products; replacement of the right products; add pads or replace the spring; cleaning, grinding or

Update; update and re-assembly; timely cleaning; product model is re-election or change to a new product

      Failure: leakage Analysis: loose pipe joints; pipe connection seal damage approach: Tighten bolts or

Take over the thread; replace the seals

      Leak serious cause analysis: Fault 5: fluid temperature does not comply; guide seat and the main seat of impurities or defects; pilot valve and

Prolapse or distortion of the main valve gasket ; poor spring assembly, deformation, or end of life; use the operating frequency is too high: adjust the flow

Body temperature or replaced; cleaning or grinding, if you repair or replace; replace the gasket; replace the spring; reelection product model or replaced with new production

Products

      Failure: power noise Cause Analysis: loose fasteners; voltage fluctuations are not within the allowable range; fluid pressure or

Not suitable for working pressure; viscosity of the fluid does not comply; armature pull surface impurities approach: tighten; adjusted to within the normal range; adjust

Pressure or differential pressure of work or replace the product; replacement of suitable products; timely cleaning

Note selection of solenoid valves

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Selection of solenoid valve should first turn to follow the four principles of safety, reliability, applicability, economy, followed by the six areas

Site conditions (ie, the pipeline parameters, fluid parameters, pressure paramet ers, electrical parameters, action, special requirements to choose). Selected in accordance with

According to:

       Pipeline parameters to select electromagnetic valve: Path specification (ie, DN), the interface mode

      1, in accordance with the site pipe diameter size or flow requirements to determine the size of the diameter (DN).

      2, interfaces, general> DN50 To select the flange interface, ≤ DN50 can be free to choose according to user needs.

      Second, according to the fluid parameters to select electromagnetic valve: material, temperature group

      A corrosive fluid: better to use corrosion-resistant jiaerling pneumatic  and stainless steel; eating superclean Fluid: should use food grade s tainless steel

Solenoid valve.

      2, high-temperature fluids: To select a high-temperature electrical materials and sealing materials, electromagnetic valve, but also to select the piston Results

Structure type.

      3, fluid status: gaseous, liquid or mixed state, in particular, is a diameter greater than DN25 order must separate.

      4, the fluid viscosity: usually 50cSt the following arbitrary choice than this value will have to use the pneumatic auto drain of the high viscosity.

      Select solenoid valve: principles and structure of species based on the pressure parameters

      1, Pressure: This parameter is the same as the meaning of other general purpose valves, is based on the pipe nominal pressure to decide.

      Working pressure: if the low pressure must be selected direct action or step-by-step principle of direct action; minimum working pressure in 0.04Mpa

Above direct-acting type, step-by-step direct-acting, Pilot operated can be selected.

      Electrical options: voltage specification should be preferred AC220V, DC24 is more convenient.

      Five, according to the length of continuous working time options: normally closed, normally open, or sustainable power

       1, normally open when the solenoid valve open for a long time, and duration of the excess time off should be used.

       2, I opened a short time or on and off time is running out, then select normally closed type.

       3, but some conditions for security, s uch as furnace, furnace flame monitoring, you can not select normally open, you should choose a long-term power

Type.

       , According to environmental requirements, the choice of auxiliary functions: explosion-proof, non-return, manual, water fog, water washout, diving, explosive environment

: You must choose the appropriate explosion-proof level of the solenoid valve (my company existing: d II BT4, d II CT5, Ex m I / II T4).

       2, when the fluid inside back, you can choose my company OK71-N, OK72-N series with non-return function solenoid valve.

       3, when the scene manual operation of the solenoid valve, you can choose OK71-S, OK72-S series with manual functional electrical

Magnetic valve.

       4, open-air installation or dust more occasions should be used to waterpr oof, dust-proof varieties (protection class IP54 or more).

       5, for the fountain must be submersible type solenoid valve (protection class IP68 and above).

Solenoid valve material temperature group selected according to the fluid parameters

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      A corrosive fluid: better to use corrosion-resistant jiaerling pneumatic and stainless steel; eating superclean Fluid: should use food grade stainless steel

Solenoid valve.

      2, high-temperature fluids: To select a high-temperature electrical materials and sealing materials, electromagnetic valve, but also to select the piston Results

Structure type.

      3, fluid status: gaseous, liquid or mixed state, in particular, is a diameter greater than DN25 order must separate.

      4, the fluid viscosity: usually 50cSt the following arbitrary choice than this value will have to use the pneumatic auto drain of the high viscosity.

According to the environmental asked to select the auxiliary function

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Explosion-proof, non-return manually, water fog, water washout, diving, explosive environment: You must choose the appropriate explosion-proof level of the solenoid valve (my company

Existing: d II BT4, d II CT5, Ex m I / II T4)

       2, when the fluid inside bac k, you can choose my company OK71-N, OK72-N series with non-return function pneumatic auto drain.

       3, when the scene manual operation of the jiaerling pneumatic, you can choose OK71-S, OK72-S series with manual functional electrical

Magnetic valve.

       4, open-air installation or dust more occasions should be used to waterproof, dust-proof varieties (protection class IP54 or more).

       5, for the fountain must be submersible type solenoid valve (protection class IP68 and above).