Shallow theory of the difference between the electric butterfly pneumatic valve and solenoid pneumatic valve

electropneumatic valve and solenoid pneumatic valve is an important executive element, the industry line control has widely used in various industries, the main difference is the following: a principle,

, pneumatic valve, electromagnetic solenoid pneumatic valve is by electromagnetic coil ( Electromagnet) And pneumatic valve core and valve body, when the electromagnetic coil current or power, drive the pneumatic valve core movement, the fluid through the pneumatic valve body or be cut off;
, electric pneumatic valve, electric pneumatic valve pneumatic valve stem is driven by motor, drive the pneumatic valve core movement, to realize the fluid through or cut off;
2, pneumatic valve type:
pneumatic valve, electromagnetic:
) Two-way solenoid pneumatic valve, pneumatic valve body has a an exit and entrance pipe connection, there are two kinds of control mode (normally open type Electric solenoid pneumatic valve shut, fluid is cut off) , normally closed type ( Electric solenoid pneumatic valve opened, the fluid through the pneumatic valve) ；
) Three-way solenoid pneumatic valve, pneumatic valve body three mouth and pipeline connection, and there are two holes, can be used for three kinds of control mode: normally closed type ( Power pressure mouth shut, vent connected to the crock mouth, electricity, the pressure to the crock mouth mouth, vent closed) Type, normally open, Pneumatic valve power, pressure to the crock mouth mouth, vent closed, electric, pneumatic valve connected to the outlet pressure mouth shut, crock mouth) Universal ( Allow the pneumatic valve connection into a normally closed or one normally open position) ；
) Four-way solenoid pneumatic valve: general use and operation double-acting cylinder, four or five pipe connections, a pressure mouth, and one or two crock mouth two exhaust ( Oil) My mouth.
, electropneumatic valve:
) Pneumatic valve and electric quarter-turn actuators supporting electric pneumatic valve, electric actuator pneumatic valve plate rotation Angle to control and adjustment of the pneumatic valve shut off and control the flow of the pipe, the electric actuator output shaft rotation is less than a week, or less than the degree, usually a degree to realize the pneumatic control valve opening and closing process. Such electric pneumatic valve mainly for butterfly pneumatic valve, pneumatic ball valve, plug valve, etc. ;
) Pneumatic valve body and multi-turn electric actuator ( Angle & gt; C) Form a complete set of electric pneumatic valve, multi-turn electric actuator output shaft turn shake more than a week, that is greater than the degrees, generally need more than one ring can realize the pneumatic control valve opening and closing process. Such electropneumatic valve main gate of pneumatic valve, the cut-off pneumatic brake valve, etc. ;
) Pneumatic valve and straight travel electric actuator ( Linear motion) Form a complete set of electric pneumatic valve, motor output shaft of the driving part of the electric actuator is straight line type, not turn the form, in a way that is lifting pneumatic valve pneumatic valve plate realize on-off control. Such electropneumatic valve gate mainly adjust the pneumatic valve, single-seat regulating pneumatic valve, two-seat regulating pneumatic valve, etc. ;

three, control strategies and electromagnetic pneumatic valve through the coil driver, can only play the role of on or off.
we use motor drive, electric pneumatic valve, open or close the action to complete the process need time is longer than the electromagnetic pneumatic valve, and through to the actuator input current and voltage signals to regulate traffic, general control signal to current signal ( ～mA、～mA） Or voltage signal, ~ ~ V, V) 。 Four, scope of application:

pneumatic valve, electromagnetic driven by electromagnetic coil, drive smaller, more easily damaged by voltage surge, generally suitable for pipe diameter is less than the DN and below, switch action when time is short, and has a specialized high-frequency electromagnetic pneumatic valve, particularly suitable for high frequency switching time short line or required to use;
are usually motor, electric pneumatic valve, comparing voltage impact resistance, driving force is big, can control the large diameter of pneumatic valves, and electric pneumatic valve can be adjusted on line flow, especially suitable for large diameter pipeline or requirement for pipe flow adjust the place of use;
pneumatic valve, electromagnetic power generally can be reset, reset electropneumatic valve need additional reset device;
pneumatic valve, electromagnetic applicable medium more extensive, acid, alkali, oil, gas, water, steam and other media can be used, but for the medium viscosity, requires a high degree of cleanliness, in front of the solenoid pneumatic valve installation to install filters, to guarantee the normal work of the solenoid pneumatic valve, low leakage rate, high security;
pneumatic valves, electric control is not only suitable for general fluid medium, and is especially suitable to control the pulp, sewage, fiber and tiny solid particles of medium, the medium of cleanliness requirements is not high, electromagnetic pneumatic valve leak rate is relatively higher.