Introduction to the pneumatic pneumatic valves

pneumatic pneumatic valve is a kind of important industrial piping system automation device, is on the basis of general pneumatic valve installation of pneumatic actuators, through air pressure drive actuators. From the pneumatic valve movement pattern generally divided into: straight stroke and Angle of stroke; From the actuator generally divided into: single action and double action. Pneumatic pneumatic valve pneumatic valve was achieved by the output signal of cutting, connected, regulation, and other functions, the general pneumatic pneumatic valves are electromagnetic air valve, air source sanlian pieces, limit switch, fittings such as locator.
pneumatic pneumatic valve positioner is designed according to the principle of force balance of work and its working principle is designed according to the principle of force balance and work. When going into the corrugated pipe pressure signal increases, to rotate the lever fulcrum around, dampers near the nozzle, the nozzle back pressure after the amplifier amplification, into the air chamber and diaphragm actuator pneumatic valve stem moves down, and drive the feedback pole ( Swinging rod) Turn around the fulcrum, feedback connection on the same shaft CAM ( Eccentric CAM) Also follow a counterclockwise rotation, through the roller to rotate the lever fulcrum around, and will feedback spring tension, the tension of the lever spring and signal pressure forces acting on the corrugated pipe reaches moment balance instrument to reach equilibrium. At this point, the certain signal with a certain pressure pneumatic valve position. Above action is positive effect, if you want to change the way we work, as long as will turn CAM, to become A to B, etc. , can. The so-called positive locator, is signal pressure increases, the output pressure also increased; The so-called reaction locator, is signal pressure increases, the output pressure is reduced. A positive role in executing agency as long as the mount reaction locator, can realize reaction actuator movement; Instead, a backlash actuators as long as the mount reaction locator, can achieve positive action of the actuator.
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