Pneumatic Cut-off Butterfly Valve - Product Overview
Our pneumatic cutting butterfly valves consist of butterfly valves with a three eccentric metal hard seal structure or a rubber soft seal structure, paired with high-intake pneumatic piston actuators. These valves are suitable for two-way switching and cutting applications, also known as pneumatic switching butterfly valves. Equipped with external stroke limit switches, solenoid valves, triple connections, and a 0.4-0.7MPa air source, they can achieve switching operations and send out two sets of passive contact signals indicating the valve's state. The pneumatic switching butterfly valve operates using compressed air, with the valve stem driving the valve disc to rotate 90 degrees within the valve body, enabling full open to full close action. The valves are categorized by their sealing performance into metal-sealed and soft-sealed types. They feature a compact structure, small size, reliable operation, good sealing, easy maintenance, convenient installation, and strong adaptability. Pneumatic cutting butterfly valves and pneumatic switching butterfly valves are widely used in industrial automatic control systems in industries such as petroleum, chemicals, light industry, papermaking, and automotive, for remote centralized control or local control.
Pneumatic Cut-off Butterfly Valve - Product Features
(1) The pneumatic butterfly valve features a simple and compact structure, light weight, easy installation and disassembly, and convenient maintenance.
(2) The pneumatic cutting butterfly valve uses a stainless steel "U" type sealing ring, which has certain elasticity and maintains excellent sealing properties with the butterfly plate, regardless of high or low temperatures.
(3) The three-dimensional eccentricity of the pneumatic butterfly valve is calculated precisely, resulting in minimal friction between the "U" seal and the butterfly plate, ensuring a long service life and the feature of becoming tighter with each closure.
(4) The pneumatic cutting butterfly valve features a sealing surface made of surfacing cobalt-based hard alloy, which offers excellent wear resistance and a long service life.
(5) The pneumatic butterfly valve has a simple structure, and the "on/off" operation is achieved by simply rotating the valve stem 90°. It offers flexible, convenient, and effortless operation, unaffected by the pressure levels of the medium, and boasts reliable sealing performance.
(6) The pneumatic cut-off butterfly valve features high temperature resistance, low temperature resistance, and strong corrosion resistance.
Pneumatic Cut-off Butterfly Valve - Technical Specifications
| Nominal Bore mm | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 |
|---|
| Nominal Pressure MPa | 0.6、1.0、1.6、2.5 |
| Connection Method | Flanged, Clamp Type |
| Motion Range | 0～90° |
| Sealing Type | Metal Seals, PTFE Seals, Rubber Seals |
| Actuator Model | GT, AT, AW Series Single-acting and Double-acting Pneumatic Actuators |
| Supply Pressure | 0.4～0.7MPa |
| Gas Source Interface | G1/4"、G1/8"、G3/8"、G1/2" |
| Ambient Temperature | -30～+70℃ |
| Functionality | Single-acting actuator, double-acting actuator |
| Available accessories | Locators, solenoid valves, air filter regulators, holding valves, stroke switches, valve position transmitters, handwheel mechanisms, etc. |
Utilizing advanced series pneumatic actuators, featuring double-acting and single-acting (spring return) types, with rack and pinion drive, ensuring safety and reliability; large-bore valves are equipped with series AW type pneumatic actuators featuring fork drive, with rational structure and high output torque, available in both double-acting and single-acting versions.
1. Gear-type double piston with high output torque and compact size.
2. Cylinder made of aluminum alloy, lightweight and aesthetically pleasing.
3. Manual operation mechanisms can be installed at the top and bottom.
4. Rack and pinion connection allows for adjustable opening angle and rated flow rate.
5. Actuators are available with telegraphic signal feedback indication and various accessories for automated operation.
6. The IS05211 standard connection facilitates the installation and replacement of the product.
7. The adjustable screws at both ends allow the standard product to have a ±4° adjustable range at 0° and 90°, ensuring synchronization accuracy with the valve.
Pneumatic Cut-off Butterfly Valve - Component Material
| Part Name | Materials |
|---|
| Valve body | Ductile iron, cast steel, alloy steel, stainless steel |
| Diel plate | Gray Cast Iron, Ductile Iron, Cast Steel, Stainless Steel, and Special Materials |
| Seal ring | Various rubbers, PTFE, stainless steel |
| Valve stem | 2Cr13, Stainless Steel |
| Filling Material | O-rings, flexible graphite |
Pneumatic Cut-off Butterfly Valve - Performance Specifications
| Nominal Pipe Size (mm) | DN50～1200 |
|---|
| Nominal Pressure | PN(MPa) | 0.6 | 1.0 | 1.6 | 2.5 |
| Test Pressure | Tensile Test | 0.9 | 1.5 | 2.4 | 3.75 |
| Seal Test | 0.66 | 1.1 | 1.76 | 2.75 |
| Low-pressure Airtightness Test | 0.5～0.7 |
| Applicable Medium | Air, water, wastewater, steam, gas, oil products, etc. |
| Applicable Temperature | Carbon Steel: -29℃ to 600℃; Stainless Steel: -40℃ to 600℃ |
Pneumatic Cut-off Butterfly Valve - Connection Size Diagram
 |  |  |
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| D643H Pneumatic Cut-off Butterfly Valve (Flanged Connection) | D673H Pneumatic Cut-off Butterfly Valve (Flanged Connection) | D671X Pneumatic Cut-off Butterfly Valve (Clamp Connection) |
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Pneumatic Cut-off Butterfly Valve - Connection Dimensions
| Nominal Diameter (DN) | Primary Dimensions | Flange Size |
|---|
| L | L1/L2 | H | H1 | A | 1.0MPa | 1.6MPa | 2.5MPa |
|---|
| Flange | Clip | Hard-sealed | Soft-sealed | D | D1 | n-Фd | D | D1 | n-Фd | D | D1 | n-Фd |
|---|
| 50 | 108 | 43 | 112 | 63 | 625 | 245 | 165 | 125 | 4-18 | 165 | 125 | 4-18 | 165 | 125 | 4-18 |
| 65 | 112 | 46 | 115 | 70 | 625 | 245 | 185 | 145 | 4-18 | 185 | 145 | 4-18 | 185 | 145 | 8-18 |
| 80 | 114 | 46 | 120 | 83 | 645 | 245 | 200 | 160 | 4-18 | 200 | 160 | 8-18 | 200 | 160 | 8-18 |
| 100 | 127 | 52 | 138 | 105 | 675 | 355 | 220 | 180 | 8-18 | 220 | 180 | 8-18 | 235 | 190 | 8-22 |
| 125 | 140 | 56 | 164 | 115 | 715 | 355 | 250 | 210 | 8-18 | 250 | 210 | 8-18 | 270 | 220 | 8-26 |
| 150 | 140 | 56 | 175 | 137 | 800 | 355 | 285 | 240 | 8-22 | 285 | 240 | 8-22 | 300 | 250 | 8-26 |
| 200 | 152 | 60 | 200 | 164 | 850 | 250 | 340 | 295 | 8-22 | 340 | 295 | 12-22 | 360 | 310 | 12-26 |
| 250 | 165 | 68 | 243 | 206 | 925 | 250 | 395 | 350 | 12-22 | 405 | 355 | 12-26 | 425 | 370 | 12-30 |
| 300 | 178 | 78 | 250 | 230 | 1035 | 450 | 445 | 400 | 12-22 | 460 | 410 | 12-26 | 485 | 430 | 16-30 |
| 350 | 190 | 78 | 280 | 248 | 1070 | 450 | 505 | 460 | 16-22 | 520 | 470 | 12-26 | 555 | 490 | 16-33 |
| 400 | 216 | 102 | 305 | 289 | 1190 | 450 | 565 | 515 | 16-26 | 580 | 525 | 16-26 | 620 | 550 | 16-36 |
| 450 | 222 | 114 | 350 | 320 | 1250 | 650 | 615 | 565 | 20-26 | 640 | 585 | 16-30 | 670 | 600 | 20-36 |
| 500 | 229 | 127 | 380 | 343 | 1290 | 650 | 670 | 620 | 20-26 | 715 | 650 | 20-30 | 730 | 660 | 20-36 |
| 600 | 267 | 154 | 445 | 413 | 1455 | 850 | 780 | 725 | 20-30 | 840 | 770 | 20-33 | 845 | 770 | 20-39 |
| 700 | 292 | 165 | 480 | 478 | 1585 | 850 | 895 | 840 | 24-30 | 910 | 840 | 24-36 | 960 | 875 | 24-42 |
| 800 | 318 | 190 | 530 | 525 | 1700 | 1250 | 1015 | 950 | 24-33 | 1025 | 950 | 24-39 | 1085 | 990 | 24-48 |
| 900 | 330 | 203 | 580 | 585 | 1965 | 1250 | 1115 | 1050 | 28-33 | 1125 | 1050 | 28-39 | 1185 | 1090 | 28-48 |
| 1000 | 410 | 216 | 650 | 640 | 2015 | 1250 | 1230 | 1160 | 28-36 | 1255 | 1170 | 28-42 | 1320 | 1210 | 28-56 |
| 1200 | 470 | 254 | 760 | 755 | 2250 | 1250 | 1455 | 1380 | 32-39 | 1485 | 1390 | 32-48 | 1530 | 1420 | 32-56 |
Pneumatic Cut-off Butterfly Valve - Product Selection
(1) Valve Body Parameters: Nominal Bore Size, Working Pressure, Process Medium, Application, Valve Body Material, and other related parameters.
(2) Actuator Parameters: Actuator Type, Control Method, Control Signal (4-20mA, 1-5V), Operating Mode (Air-Open, Air-Close)
Please provide as much detail as possible regarding the above technical specifications to facilitate our production and technical team in accurately selecting the right options for you. If you have any questions, feel free to call us, and we will strive to provide you with excellent service!
Related Names: ZSHD Pneumatic Cut-off Butterfly Valve, Pneumatic On/Off Butterfly Valve, Handwheel-Operated Cut-off Flanged Butterfly Valve
