Description
Pneumatic Soft-Seated Butterfly Valve
This pneumatic soft-seated butterfly valve consists of a rubber-seated valve
body with a carbon steel or stainless steel butterfly disc and valve shaft. It
is designed for flow regulation and shut-off in water, wastewater, air, gas,
steam, oil and mildly corrosive fluid pipelines.
The valve is widely used in food processing, pharmaceutical, chemical,
petroleum, power generation, textile, paper and general industrial systems.
Its compact construction, quick quarter-turn operation and replaceable sealing
components provide reliable bidirectional sealing and convenient maintenance.
Main Features
- Compact and lightweight butterfly valve design.
- Fast opening and closing with low operating torque.
- Suitable for installation in any position.
- Replaceable sealing components for easy maintenance.
- Reliable bidirectional sealing with zero visible leakage under suitable conditions.
- Ageing-resistant and corrosion-resistant sealing materials.
- Available with double-acting or spring-return pneumatic actuators.
- Optional manual override, solenoid valve, limit switch and positioner.
- ISO 5211 mounting interface for convenient actuator installation and replacement.
Applicable Standards
| Item | Standard |
|---|
| Design | GB/T 12238-1989 |
| Flange Dimensions | GB/T 9113.1-2000, GB/T 9115.1-2000 and JB78 |
| Face-to-Face Dimensions | GB/T 12221-1989 |
| Pressure Testing | GB/T 13927-1992 and JB/T 9092-1999 |
Technical Specifications
| Item | Specification |
|---|
| Nominal Size | DN50 to DN2000 |
| Pressure Rating | PN0.6, PN1.0 and PN1.6 MPa |
| Shell Test Pressure | 0.90, 1.50 and 2.40 MPa |
| Water Seal Test Pressure | 0.66, 1.10 and 1.76 MPa |
| Air Seal Test Pressure | 0.60 MPa |
| Applicable Media | Air, water, wastewater, steam, gas, oil products and mildly corrosive fluids |
| Operation | Manual, worm gear, pneumatic, electric or hydraulic |
| Pneumatic Actuator | Double-acting or spring-return actuator |
Main Materials
| Part | Material |
|---|
| Valve Body | Ductile iron, cast steel, alloy steel or stainless steel |
| Butterfly Disc | Gray cast iron, ductile iron, cast steel, stainless steel or special materials |
| Valve Shaft | 2Cr13 stainless steel or stainless steel |
| Seat | Nitrile rubber, EPDM, PTFE, fluororubber or other elastomers |
| Packing | O-ring or flexible graphite |
Sealing Materials and Temperature Range
| Material | Abbreviation | Code | Maximum Temperature | Working Temperature |
|---|
| Neoprene Rubber | CR | X / J | 82°C | 0°C to +80°C |
| Nitrile Rubber | NBR | XA / JA | 93°C | -20°C to +82°C |
| EPDM | EPDM | XB / JB | 150°C | -40°C to +125°C |
| PTFE | PTFE | F / XC / JC | 232°C | -30°C to +150°C |
| Silicone Rubber | SI | XD / JD | 250°C | -70°C to +150°C |
| Fluororubber | VITON | XE / JE | 204°C | -23°C to +150°C |
| Natural Rubber | NR | X1 | 85°C | -20°C to +85°C |
| Nylon | PA | N | 93°C | -30°C to +93°C |
Main Dimensions — PN6 / PN10 / PN16
| DN | NPS | L | H | H0 | A | B | PN6 | PN10 | PN16 |
|---|
| D0 | n-d | D0 | n-d | D0 | n-d |
|---|
| 50 | 2 | 43 | 63 | 315 | 180 | 65 | 110 | 4-14 | 125 | 4-18 | 125 | 4-18 |
| 65 | 2-1/2 | 46 | 70 | 330 | 180 | 65 | 130 | 4-14 | 145 | 4-18 | 145 | 4-18 |
| 80 | 3 | 46 | 83 | 390 | 245 | 72 | 150 | 4-18 | 160 | 8-18 | 160 | 8-18 |
| 100 | 4 | 52 | 105 | 431 | 240 | 72 | 170 | 4-18 | 180 | 8-18 | 180 | 8-18 |
| 125 | 5 | 56 | 115 | 455 | 240 | 72 | 200 | 8-18 | 210 | 8-18 | 210 | 8-18 |
| 150 | 6 | 56 | 137 | 626 | 350 | 93 | 225 | 8-18 | 240 | 8-22 | 240 | 8-22 |
| 200 | 8 | 60 | 164 | 720 | 350 | 93 | 280 | 8-18 | 295 | 8-22 | 295 | 12-22 |
| 250 | 10 | 68 | 206 | 800 | 550 | 350 | 335 | 12-18 | 350 | 12-22 | 355 | 12-26 |
| 300 | 12 | 78 | 230 | 860 | 600 | 350 | 395 | 12-22 | 400 | 12-22 | 410 | 12-26 |
| 350 | 14 | 78 | 248 | 883 | 600 | 350 | 445 | 12-22 | 460 | 16-22 | 470 | 16-26 |
| 400 | 16 | 102 | 289 | 972 | 600 | 350 | 495 | 16-22 | 515 | 16-26 | 525 | 16-30 |
| 450 | 18 | 114 | 320 | 1043 | 750 | 380 | 550 | 16-22 | 565 | 20-26 | 585 | 20-30 |
| 500 | 20 | 127 | 343 | 1098 | 750 | 380 | 600 | 20-22 | 620 | 20-26 | 650 | 20-33 |
| 600 | 24 | 154 | 413 | 1236 | 750 | 380 | 705 | 20-26 | 725 | 20-30 | 770 | 20-36 |
| 700 | 28 | 165 | 478 | 1431 | 750 | 380 | 810 | 24-26 | 840 | 24-30 | 840 | 24-36 |
| 800 | 32 | 190 | 525 | 1488 | 750 | 380 | 920 | 24-30 | 950 | 24-33 | 950 | 24-39 |
Optional Pneumatic Accessories
- Single-solenoid valve
- Double-solenoid valve
- Limit switch box
- Electro-pneumatic positioner
- Pneumatic positioner
- I/P converter
- Air filter regulator
- FRL air treatment unit
- HVSD manual override
Dimensions, materials, actuator configuration and pressure-temperature limits are subject to the final WDL Valve technical drawing and approved project datasheet.
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