Product Name: Pneumatic Shut-off Butterfly Valve
Valve Model: D671X, D641X, D673H, D643H
Nominal Diameter Specification: DN50～DN1200
Structure Type: Center-line type, Triple-eccentric type
Valve Body Material: Cast Steel WCB, Stainless Steel 304, Stainless Steel 316
Nominal Pressure: PN6, PN10, PN16, PN25, PN40
Applicable Temperature: -40℃～450℃
Application Range: Gas, water, oil products, steam, corrosive fluids
Product Features: Very fast opening and closing speed, suitable for occasions requiring quick switching or emergency shut-off
| Nominal Diameter | DN50～DN1200(mm) |
| Pressure Class | PN0.6, 1.0, 1.6, 2.5, 6.4MPa |
| Connection Method | Flange type or Wafer type |
| Operating Range | 0-90° |
| Actuation Method | Pneumatic control, air supply driven (can be equipped with handwheel) (Note: The original "*" is corrected to "control") |
| Supply Pressure | 0.4～0.7MPa |
| Sealing Material | Metal seal, PTFE seal, Rubber seal |
| Working Occasions | Fluids, steam, oil products, corrosive media, etc. |
| Control Method | On-off mode (two-position on-off shut-off) Air-open type, Air-close type, Spring return |
| Accessory Options | Positioner, solenoid valve, air filter regulator, lock-up valve, travel switch, valve position transmitter, handwheel mechanism, etc. |
Standards and Specifications for Pneumatic Shut-off Butterfly Valve:
Design Standard: GB/T2238-1989
Flange Connection Dimension: GB/T9113.1-2000; GB/T9115.1-2000
Face-to-Face Dimension: GB/T12221-1989
Pressure Test: GB/T13927-2000; JB/T9092-1999
Applicable Media: Air, water, sewage, steam, gas, oil products, etc.
Strength Test Pressure (MPa): 0.9, 1.5, 2.4, 3.75 (Note: Corresponding to PN0.6, 1.0, 1.6, 2.5 respectively)
Seal Test Pressure (MPa): 0.66, 1.1, 1.76, 2.75 (Note: Corresponding to PN0.6, 1.0, 1.6, 2.5 respectively)
Low-Pressure Air Tightness Test Pressure (MPa): 0.5～0.7
Applicable Temperature: Soft Seal: -29℃～180℃; Hard Seal: -40℃～600℃
Model Selection Recommendations