Pneumatic Unbalanced Shut-off control valve

Pneumatic Unbalanced Shut-off control valve

Pneumatic unbalanced shut-off control valve adopts top guided pressure unbalanced plug. It is suitable for applications with low differential pressure. The plug and seat surfaces are subjected to hard alloy overlay welding to ensure long-time stable running of the valve. For shut-off applications of media of high temperature and service conditions with high differential pressure, we have specially designed the double-plug pressure relief type shut-off valve. The trim of this kind of valve adopts double-plug structure with flow to close design. When opening the valve, first open the small plug, and the starting force is relatively low because the area of thrust surface of the small plug is small. After the small plug is opened, the pressure after the valve is released and the differential pressure acting on the large plug is greatly reduced. The large plug can be opened with a relatively low actuator force. The trim of this kind of structure can meet the need for shut-of applications in service conditions with high differential pressure.

Specifications of Pneumatic Unbalanced Shut-off control valve

Trim Features:    Sleeve Guided Type, Unbalanced Trim Structure, With Balanced seal ring structure, With Double Plug Structure

Body Type:       Straight-Through Type, Angle Type

Bonnet Type:     Standard Type, Heat Dissipation Type ( Or say Heat Radiation Type), Cryogenic Type, Bellow Type

Flow Characteristic:  Quick Open Characteristic

Shut-Off Class:     ASME B16.104 V (Standard Metal Seat),

                 ASME B16.104 VI( Shut-off Soft Seat)

Pipe Connection Type: Flange Type, Butt welding Type

Applicable Temperature Range: -196°C -  570 °C ( Double-Seat Structure),

Actuator Type:    Pneumatic Diaphragm Actuator,

                Pneumatic Piston Actuator,

                Electric Actuator.