What are the uses and characteristics of pneumatic control valve?

Purpose and characteristics

A. the purpose and characteristic use of pneumatic control valve is a right angle rotary structure, which is used together with valve positioner to realize proportional adjustment; V-shaped valve core is most suitable for various adjustment occasions, with large rated flow coefficient, adjustable ratio, good sealing effect, flexible adjustment performance, small volume and vertical and horizontal installation. Suitable for controlling gas, steam, liquid and other media.

B. features: it is a kind of right angle rotary structure, composed of V-shaped valve body, pneumatic actuator, positioner and other accessories; it has an approximate natural flow characteristic of equal ratio; it adopts double bearing structure, with small starting torque, good sensitivity and induction speed; it has strong shearing ability.

C. the pneumatic piston actuator uses compressed air as the power source to drive the crank arm to rotate 90 degrees through the movement of the piston, so as to make the valve open and close automatically. Its components are: adjusting bolt, actuator box, curved arm, cylinder block, cylinder shaft, piston, connecting rod and cardan shaft.

D. working principle of pneumatic control valve: pneumatic control valve is composed of actuator and regulating mechanism. The actuator is the thrust component of the control valve, which generates the corresponding thrust according to the size of the control signal pressure to promote the action of the control mechanism. The valve body is the regulating part of the pneumatic regulating valve, which directly contacts with the regulating medium to regulate the flow of the fluid.