Name: Piston Pneumatic Control Valve
Size: 2-24 Inch, DN50-DN600
Pressure: Class 150-2500 LB, PN20-PN420
Material: ASTM A216 WCB, ASTM A351 CF3M, CF8M
Face to Face: ASME B16.10
Flange Dimension: ASME B16.5
Test & Inspection: IEC 60534-4
Temperature of Media: Medium Temperature
Operator: Electric, Motor
Connection: Raised Flange, Flat Flange, Butt Weld etc
The utility model discloses a Piston Pneumatic Control Valve which is characterized in that a cylinder is provided with a working air chamber and a return air chamber, wherein the return air chamber is provided with a keeping valve used for providing return air pressure; a piston returns through the air pressure of the return air chamber, which replaces the return of a traditional spring; the phenomenon that because the spring is tired and can not provide enough return power, the control precision of a control valve is affected is avoided.