What are the purpose and characteristics of pneumatic pneumatic control valve

Pneumatic type pneumatic control valve is petroleum, chemical, electric power, metallurgy and other industrial enterprises one of the widely used industrial process control instrument. Usually are connected by a pneumatic actuators and pneumatic control valve installation and debugging after the formation of the combination instrument. USES and characteristics of A, use pneumatic usages and characteristics of pneumatic control valve is A quarter-turn structure, it has to do with the valve positioner, proportional control can be realized; V valve core is the most suitable for all kinds of regulating occasions, with large rated flow coefficient, adjustable than large, good sealing effect, sensitive regulation performance, small size, can be installed in vertical lie. Apply to control gas, steam, liquid medium. B, characteristics: a quarter-turn structure, by the v-shaped body, actuator, positioner, and other accessories; There is a best than the intrinsic flow feature of such as approximation; With double bearing structure, small starting torque, has excellent sensitivity and speed of induction; Strong ability of shear. C, pneumatic piston actuators using compressed air as power source, through the movement of the piston driven 90 - degree rotating crank arm, to make the automatic opening and closing of the valve. Part of it is: the adjusting bolt, actuator housing, crank arm shaft, piston, connecting rod, cylinder block, cylinder, cardan shaft. D, pneumatic working principle of pneumatic control valve, pneumatic control valve consists of actuators and regulating mechanism. Is a thrust part of the pneumatic control valve actuator, it according to the size of the control signal pressure to produce the corresponding thrust, promote regulating mechanism. Body is pneumatic pneumatic - valve regulating unit, it directly contact with the control agent, regulating the flow of the fluid.