Pneumatic valve is driven by compressed air valve. First, the main types of pneumatic valves: 1 Pneumatic V-shaped ball valve adjustment 2 Pneumatic O-cut ball valve 3 torque cylinder ball valve 4 electromagnetic diaphragm valve 5 Pneumatic straight-acting diaphragm valve 6 electric valve 2, pneumatic V-type valve: Purpose and Features , Use is a right-angle rotary structure, which is used in conjunction with the valve positioner, enabling proportional adjustment; V-valve spool is best suited for a variety of regulatory occasions, with a large flow coefficient, adjustable ratio, good sealing effect, adjust Zero-sensitive performance, small size, can be installed vertically. Suitable for controlling gas, steam, liquid and other media. 2, Features: It is a right-angle rotary structure, which is composed of a V-shaped valve body, a pneumatic actuator, a positioner and other accessories. It has an inherent flow characteristic of approximately equal to one hundredths of a percentage; adopts a double bearing structure with a small starting torque and a pole Good sensitivity and speed of induction; Super shear capacity. 3, Pneumatic piston actuator uses compressed air as the power source, through the movement of the piston crank to carry out 90-degree rotation, so that the valve automatically open and close. Its components are: adjusting bolt, actuator box, crank arm, cylinder block, cylinder shaft, piston, connecting rod and cardan shaft. 4, pneumatic control valve works: Pneumatic control valve by the implementing agencies and regulatory agencies. Actuator is the thrust member of the regulating valve, which generates the corresponding thrust according to the magnitude of the control signal pressure and drives the adjusting mechanism to act. The valve body is the regulating part of the pneumatic control valve which is in direct contact with the regulating medium to regulate the flow of the fluid.