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Electric pneumatic valve and pneumatic pneumatic valve performance and application
by：AIRWOLF
2020-10-15
Electric pneumatic valve and pneumatic pneumatic valve is frequently used in automatic control of pneumatic valve two kinds of pneumatic valve.
These two kinds of forms of pneumatic valves are not the same.
Therefore, it is necessary to grasp the characteristics and differences of the two, help to the selection and application of pneumatic valve.
electropneumatic valve electric actuator considering its in high pressure water system needs a smooth, stable and slow process, mainly used in power plants or nuclear power plants.
electric actuators is mainly advantage is high stability, stable thrust, available for users. Very large thrust of up to 225000 KGF actuator. Only hydraulic actuators to achieve such a large thrust, but the hydraulic actuator is much higher than the cost of the electric actuator.
if the configuration of the servo amplifier, can easily achieve positive and negative effects of exchange, is also very easy to set up close the pneumatic valve position signal status ( Keep/open/close) 。 When problems arise, we must keep in the original position, the pneumatic actuators. Pneumatic actuators must choose a set of integrated security system to achieve security position.
electropneumatic valve electric actuator faults mainly has:
structure is complex, it is easy to appear problem, and considering the complexity, higher requirements to the maintenance personnel's professional ability; If the motor operates formation heat, adjust too frequently, it is easy to cause motor overheating, heat protection condition, also increase the wear reduction gear; In addition, delayed operation, from the response of the controller output signal to pneumatic valve takes a long time to move to the corresponding position, it can't compare with pneumatic and hydraulic actuators.
pneumatic valve pneumatic actuators and regulating mechanism is to maintain consistent, actuator diaphragm and piston type two kinds. Piston stroke length, more suitable for need big thrust condition; Diaphragm stroke is small, can only direct drive pneumatic valve stem. Is widely used in power plant, chemical industry, oil refining, etc on the safety factor in the production process of high demand.
pneumatic actuator mainly advantage: receiving continuous gas output signal and linear displacement ( After electricity/gas conversion equipment, also can receive continuous electrical signal) 。 There are some in the configuration when the rocker can output angular displacement. It has positive and negative effect. Movement speed is larger, but the load is increased speed will slow. The output force and the actual pressure. High safety and reliability, but can't repair after air supply interruption ( And after a pneumatic valve can repair) 。 To achieve phase control and program control is not convenient. Maintenance is simple, good adaptability to the environment. High output power. Has explosion-proof performance. Can choose various types of explosion-proof electrical equipment accessories.
electropneumatic valve electric actuator considering its in high pressure water system needs a smooth, stable and slow process, mainly used in power plants or nuclear power plants.
electric actuators is mainly advantage is high stability, stable thrust, available for users. Very large thrust of up to 225000 KGF actuator. Only hydraulic actuators to achieve such a large thrust, but the hydraulic actuator is much higher than the cost of the electric actuator.
if the configuration of the servo amplifier, can easily achieve positive and negative effects of exchange, is also very easy to set up close the pneumatic valve position signal status ( Keep/open/close) 。 When problems arise, we must keep in the original position, the pneumatic actuators. Pneumatic actuators must choose a set of integrated security system to achieve security position.
electropneumatic valve electric actuator faults mainly has:
structure is complex, it is easy to appear problem, and considering the complexity, higher requirements to the maintenance personnel's professional ability; If the motor operates formation heat, adjust too frequently, it is easy to cause motor overheating, heat protection condition, also increase the wear reduction gear; In addition, delayed operation, from the response of the controller output signal to pneumatic valve takes a long time to move to the corresponding position, it can't compare with pneumatic and hydraulic actuators.
pneumatic valve pneumatic actuators and regulating mechanism is to maintain consistent, actuator diaphragm and piston type two kinds. Piston stroke length, more suitable for need big thrust condition; Diaphragm stroke is small, can only direct drive pneumatic valve stem. Is widely used in power plant, chemical industry, oil refining, etc on the safety factor in the production process of high demand.
pneumatic actuator mainly advantage: receiving continuous gas output signal and linear displacement ( After electricity/gas conversion equipment, also can receive continuous electrical signal) 。 There are some in the configuration when the rocker can output angular displacement. It has positive and negative effect. Movement speed is larger, but the load is increased speed will slow. The output force and the actual pressure. High safety and reliability, but can't repair after air supply interruption ( And after a pneumatic valve can repair) 。 To achieve phase control and program control is not convenient. Maintenance is simple, good adaptability to the environment. High output power. Has explosion-proof performance. Can choose various types of explosion-proof electrical equipment accessories.
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