Pneumatic Soft Seal Butterfly Valve Product Overview
The D671X and D641X pneumatic soft seal butterfly valves consist of a pneumatic piston actuator, a rubber-sealed butterfly valve, and a carbon steel or stainless steel valve plate and stem. These valves are suitable for temperatures ≤120°C and are used in applications such as food, pharmaceuticals, chemicals, petroleum, power, light textiles, papermaking, and other water supply and drainage or gas pipelines to regulate flow and shut off media. The main features of pneumatic soft seal butterfly valves include:
(1) Innovative and rational design, simple structure, lightweight, and quick opening and closing.
(2) Low operating torque, easy operation, labor-saving, and flexible.
(3) Can be installed in any position, easy maintenance.
(4) Replaceable sealing components, reliable sealing performance achieving bidirectional sealing with zero leakage.
(5) Sealing materials are aging-resistant, corrosion-resistant, and have a long service life.
Pneumatic Soft Seal Butterfly Valve Technical Parameters
| Nominal Diameter DN (mm) | DN50–1000mm |
|---|
| Nominal Pressure (MPa) | PN1.0, 1.6, 2.5MPa |
| Valve Body Type | Straight-Through Cast Valve Body |
| Connection Type | Flanged, Wafer Type |
| Valve Core Type | Butterfly Disc Type |
| Sealing Packing | Flexible Graphite, PTFE |
| Basic Error | With positioner: less than ±2% of full stroke |
| Hysteresis | With positioner: less than ±2% of full stroke |
| Control Method | Switch Type (On/Off Two-Position Control), Regulating Type (4–20mA Control) |
Pneumatic Soft Seal Butterfly Valve Actuator Parameters
| Actuator Model | GT, AT, AR, AW Series Single and Double Acting Pneumatic Actuators |
|---|
| Air Supply Pressure | 0.4–0.7MPa |
| Air Source Interface | G1/4", G1/8", G3/8", G1/2" |
| Ambient Temperature | -30–+70°C |
| Action Type | Single Acting Actuator: Air-to-Close (B)—Valve Opens on Air Failure (FO); Air-to-Open (K)—Valve Closes on Air Failure (FC)
Double Acting Actuator: Air-to-Close (B)—Valve Position Maintained on Air Failure (FL); Air-to-Open (K)—Valve Position Maintained on Air Failure (FL) |
| Optional Accessories | Positioner, Solenoid Valve, Air Filter Regulator, Lock Valve, Limit Switch, Valve Position Transmitter, Handwheel Mechanism, etc. |
