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Wholesale Pneumatic wafer butterfly valve single acting spring type Manufacturers, Factory
Product Description
Valve Type
Wafer Butterfly Valve
Structure
Concentric
Standard
EN593
Workmanship
Investment Casting
Sealing Direction
Bidirectional
Sealing Grade
Zero Leakage
Temperature Range
-20°C < T < 120°C
Operation
Pneumatic
Characteristics
Pneumatic butterfly valves use compressed air as their power source. When compressed air enters the pneumatic actuator, it pushes the piston or gear rack and other components inside the actuator to move, which in turn drives the valve stem and butterfly plate to rotate, achieving the opening or closing of the valve. By installing a valve positioner, the rotation angle of the butterfly plate can also be controlled, thereby accurately adjusting parameters such as flow rate and pressure of the medium in the pipeline.
Advantages
01
Quick Opening and Closing Response
Powered by compressed air, the pneumatic actuator drives the butterfly plate to rotate, and the opening and closing time only takes a few seconds, far faster than some manually or electrically driven valves, suitable for working conditions that require quick opening and closing (such as emergency shutdown, system switching).
02
Adaptive Automation Integration
It can be paired with accessories such as solenoid valves, valve positioners, limit switches, etc. to achieve remote control, proportional adjustment, and status feedback. It can easily connect to industrial automation systems such as PLC and DCS to meet the needs of intelligent production.
03
Low Operating Cost
Pneumatic drive system has a simple structure, low failure rate, and a wide range of compressed air sources. Compared with electric drive, it does not need to consider complex protection issues such as explosion prevention and leakage, especially suitable for flammable and explosive scenarios such as chemical and mining.
Packing
Standard export wooden case packaging
Application Scenarios
The application scope of pneumatic butterfly valves covers multiple fields such as municipal engineering, industrial manufacturing, and people's livelihood supporting facilities. The core revolves around the on/off control and flow regulation of fluid media, especially suitable for working conditions with limited space and requiring automated operation.
Material
| Body | Disc | Stem | Bushing | Seat | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Name | Code | Name | Code | Name | Code | Name | Code | Name | Code | Working Temp (°C) |
| Cast iron | Z | Plated ductile iron | B1 | Stainless steel | - | Lubrized bronze | - | NR | X1 | -20 ~ +85℃ |
| Ductile iron | Q | Aluminum bronze | B2 | Hypalon | X2 | -23 ~ +121℃ | ||||
| Aluminum bronze | T | ZG1Cr18Ni9Ti Stainless steel | B3 | EPDM | X3 | -23 ~ +121℃ | ||||
| ZG1Cr13Ni9Ti Stainless steel | P | Titanium steel | B4 | Neoprene | X4 | -7 ~ +93℃ | ||||
| CF8M Stainless steel | R | CF8M Stainless steel | B5 | NBR | X5 | -23 ~ +100℃ | ||||
| Carbon steel | C | Carbon steel | B6 | Wear-resistant rubber | X6 | -10 ~ +100℃ | ||||
| CF8 Stainless steel | - | CF8 Stainless steel | B7 | VITON | X7 | -23 ~ +200℃ | ||||
| - | - | - | - | Heat-resistant rubber | X9 | -23 ~ +135℃ | ||||
| - | - | - | - | PTFE | F4 | +10 ~ +150℃ | ||||
Dimension
| DN | A | B | C | D | L | H | D1 | n-φ | K | E | n1-φ1 | φ2 | G | n2-M | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | inch | ||||||||||||||
| 50 | 2" | 161 | 80 | 42 | 52.9 | 32 | 84.84 | 120 | 4-φ 23 | 77 | 57.15 | 4-φ 6.7 | 12.6 | 118 | - |
| 65 | 2.5" | 175 | 89 | 44.7 | 64.5 | 32 | 96.2 | 136.2 | 4-φ 26.5 | 77 | 57.15 | 4-φ 6.7 | 12.6 | 137 | - |
| 80 | 3" | 181 | 95 | 45.2 | 78.8 | 32 | 61.23 | 160 | 8-φ 18 | 77 | 57.15 | 4-φ 6.7 | 12.6 | 143 | - |
| 100 | 4" | 200 | 114 | 52.1 | 104 | 32 | 70.80 | 185 | 4-φ 24.5 | 92 | 69.85 | 4-φ 10.3 | 15.77 | 156 | - |
| 125 | 5" | 213 | 127 | 54.4 | 123.3 | 32 | 82.28 | 215 | 4-φ 23 | 92 | 69.85 | 4-φ 10.3 | 18.92 | 190 | - |
| 150 | 6" | 226 | 139 | 55.8 | 155.6 | 32 | 91.08 | 238 | 4-φ 25 | 92 | 69.85 | 4-φ 10.3 | 18.92 | 212 | - |
| 200 | 8" | 260 | 175 | 60.6 | 202.5 | 45 | 112.89 76.35 | 295 | 4-φ 25 4-φ 23 | 115 | 88.9 | 4-φ 14.3 | 22.1 | 268 | - |
| 250 | 10" | 292 | 203 | 65.6 | 250.5 | 45 | 92.40 | 357 | 4-φ 29 | 115 | 88.9 | 4-φ 14.3 | 28.45 | 325 | - |
| 300 | 12" | 337 | 242 | 76.9 | 301.6 | 45 | 105.34 | 407 | 4-φ 29 | 140 | 107.95 | 4-φ 14.3 | 31.6 | 403 | - |
| 350 | 14" | 368 | 267 | 76.5 | 333.3 | 45 | 91.11 | 467 | 4-φ 30 | 140 | 107.95 | 4-φ 14.3 | 31.6 | 436 | - |
| 400 | 16" | 400 | 309 | 86.5 | 389.6 | 51.2 72 | 100.47 102.42 | 515 525 | 4-φ 26 4-φ 30 | 197 | 158.75 | 4-φ 20.6 | 33.15 | 488 | - |
| 450 | 18" | 422 | 328 | 105.6 | 440.51 | 51.2 72 | 88.39 91.51 | 565 585 | 4-φ 26 4-φ 30 | 197 | 158.75 | 4-φ 20.6 | 38 | 539 | - |
| 500 | 20" | 480 | 361 | 131.8 | 491.6 | 64.2 82 | 95.99 101.68 | 620 650 | 4-φ 26 4-φ 33 | 197 | 158.75 | 4-φ 20.6 | 41.15 | 593 | - |
| 600 | 24" | 562 | 459 | 152 | 592.5 | 70.2 82 | 113.42 120.46 | 725 770 | 20-φ 30 20-φ 36 | 276 | 215.9 | 4-φ 22.2 | 50.65 | 816 | - |
| 700 | 28" | 624 | 520 | 163 | 695 | 66 82 | 109.65 840 | 840 | 24-φ 30 20-φ 36 | 300 | 254 | 8-φ 18 | 55 63.35 | 895 | 4-M33 |
| 800 | 32" | 672 | 591 | 188 | 794.7 | 66 82 | 124 950 | 950 | 24-φ 33 24-φ 39 | 300 | 254 | 8-φ 18 | 55 63.35 | 1015 | - |
| 900 | 36" | 720 | 656 | 203 | 864.7 | 118 | 117.57 | 1050 | 24-φ 33 | 300 | 254 | 8-φ 18 | 75 | 1115 | 4-M30 |
| 1000 | 40" | 800 | 721 | 216 | 965 | 142 | 129.89 | 1160 | 24-φ 36 | 300 | 254 | 8-φ 18 | 85 | 1230 | 4-M33 |
Frequently Asked Questions (FAQ)
Q
How does a pneumatic wafer butterfly valve work?
It operates using compressed air fed into a pneumatic actuator. The pressure moves internal pistons or gear racks, rotating the valve stem and concentric disc to quickly open, close, or throttle fluid flow in the pipeline.
Q
What is the sealing grade and performance of this valve?
The valve achieves a zero-leakage sealing grade with bidirectional sealing capability, ensuring reliable shutoff across a standard operating temperature range of -20°C to 120°C (with seat options extending up to +200°C).
Q
What body and seat materials are available?
Body materials include Cast Iron, Ductile Iron, Aluminum Bronze, Carbon Steel, and Stainless Steels (CF8, CF8M, ZG1Cr13Ni9Ti). Seats come in NR, EPDM, NBR, Neoprene, Hypalon, VITON, and PTFE to suit various media and temperatures.
Q
What are the main benefits of using a pneumatic actuator over electric or manual options?
Pneumatic actuators offer rapid response times (opening/closing in seconds), low maintenance costs, inherent explosion-proof safety for hazardous environments, and simple integration with automation accessories like solenoid valves and limit switches.
Q
Can this valve be integrated into automated PLC or DCS systems?
Yes, by equipping positioners, limit switches, and solenoid valves, it connects directly into industrial control architectures (PLC/DCS) for remote control, precise proportional flow adjustment, and real-time status feedback.
Q
What size ranges are supported?
The standard dimension range covers nominal pipe sizes from DN50 (2 inches) up to DN1000 (40 inches) manufactured to EN593 standards.
