Pneumatic Flanged Butterfly Valve - Product Overview
Our D641X and D643H pneumatic flanged butterfly valves consist of an angular actuator and a butterfly valve body. Their main advantages include: simple structure, compact size and light weight, and low cost. This is particularly evident in the pneumatic flanged butterfly valves, which are easy to install in high-altitude tunnels and controlled by a two-position five-way solenoid valve for convenient operation. With a valve positioner, they can also adjust flow rate, temperature, pressure, and other parameters. These valves have low fluid resistance, and when fully open, medium and large-sized pneumatic flanged butterfly valves have a large effective flow area, making them quick and easy to open and close. A 90-degree rotation of the butterfly handle is sufficient. Due to the nearly equal medium-acting force on both sides of the butterfly plate, the torque directions are opposite, resulting in a smaller closing torque. They achieve good sealing at low pressure. The sealing materials for pneumatic flanged butterfly valves include nitrile rubber and fluororubber, known as pneumatic flanged soft-seated butterfly valves. The pneumatic hard-seated flanged butterfly valves are multi-layer metal hard-seated, offering the benefits of elastic sealing and excellent sealing performance even at low temperatures. Therefore, pneumatic flanged butterfly valves are widely used on pipelines carrying corrosive media such as metallurgy, power, oil, chemicals, air, coal gas, combustible gases, and water supply and drainage.
Pneumatic Flanged Butterfly Valve - Product Features
Small in size, light in weight, easy to operate, convenient for installation and maintenance.
(2) Excellent and reliable sealing performance with zero leakage, long service life.
(3) Flow characteristics approach a straight line, with enhanced regulating performance.
(4) Simple structure, quick on/off, 90° rotation for opening and closing.
(5) Can replace the use of various valves such as gate valves, stop valves, plug valves, hose valves, and diaphragm valves.
Pneumatic Flanged Butterfly Valve - Technical Parameters
| Nominal Pipe Size DN (mm) | 50～1200 |
|---|
| Nominal Pressure | PN1.0、1.6、2.5MPa |
| Flange Standard | JB/T79、GB/T9113、HG20594-97 |
| Connection Type | Flanged |
| Valve plate style | Vertical plate |
| Flow Characteristics | Approximate Quick-Release Type |
| Motion Range | 0～90° |
| Leakage rate | In accordance with GB/T4213-92, for Kv value of 10^-4 |
| Basic Error | With locator: ±2% less than full travel |
| Return Difference | With locator: ±2% less than full travel |
| Adjustable Range | 50:1 |
| Actuator Configuration | GT, AT, AR, AW Series Double-acting and Single-acting Pneumatic Actuators |
| Control Method | Switch-type (two-position control), Adjust-type (4-20mA control) |
Pneumatic Flanged Butterfly Valve Actuator Parameters
| Actuator Model | GT, AT, AR, AW Series Double-acting and Single-acting Pneumatic Actuators |
|---|
| Supply Pressure | 0.4～0.7MPa |
| Gas Source Interface | G1/4"、G1/8"、G3/8"、G1/2" |
| Ambient Temperature | -30～+70℃ |
| Function form | Single-acting actuator: Gas-closed (B) – valve opens (FO) when gas is lost; Gas-open (K) – valve closes (FC) when gas is lost
Double-acting actuator: Air-closed (B) – Valve position held (FL) during air loss; Air-open (K) – Valve position held (FL) during air loss |
| Available accessories | Locators, solenoid valves, air filter regulators, hold-open valves, stroke switches, position transmitters, handwheels, etc. |
Utilizing advanced series pneumatic actuators, featuring double-acting and single-acting (spring return) types, with gear rack transmission for safety and reliability; large bore valves are equipped with series AW type pneumatic actuators using fork-type transmission, with a rational structure and high output torque, available in both double-acting and single-acting versions.
Gears double piston design, offering high output torque with a 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. Ratchet-type connections allow for adjustable opening angle and rated flow rate.
5. Actuators are available with telegraphic signal feedback indicators and various accessories for automated operation.
6. The IS05211 standard connection facilitates the installation and replacement of the product.
7. The adjustment screws at both ends allow standard products to have an adjustable range of ±4° at 0° and 90°, ensuring synchronization accuracy with the valve.
Pneumatic Flanged Butterfly Valve - Parts Material
| Part Name | Material Name |
|---|
| Valve body | Cast Iron, Cast Steel, Stainless Steel, Chromium Molybdenum Steel, Alloy Steel |
| Dial plate | Cast steel, alloy steel (hard chrome plated), stainless steel, chrome-molybdenum steel |
| Seal Ring | Rubber, PTFE, PPL, Stainless Steel, Polylactic Acid, Abrasion-Resistant Materials |
| Valve Stem | 2Cr13, 1Cr13 Stainless Steel, Chromium-Molybdenum Steel |
| Filling Material | Polytetrafluoroethylene, flexible graphite |
Pneumatic Flanged 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 tightness test | 0.5～0.7 |
| Applicable Medium | Water, oil (temperature ≤ 90℃), steam, nitric acid (temperature ≤ 200℃), acetic acid (temperature ≤ 200℃) |
Pneumatic Flanged Butterfly Valve - Connection Size Diagram
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| D643H Pneumatic Hard Seated Butterfly Valve | D641X Pneumatic Soft Sealed Flanged Butterfly Valve |
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Pneumatic Flanged Butterfly Valve - Connection Dimensions
| Nominal Bore Size | Structure Length | Dimensions (Reference Values) | Connection Size (Standard Value) |
|---|
| 0.6MPa | 1.0MPa | 1.6MPa |
|---|
| millimeters | inches | L | H | H1 | A | D | D1 | n-Φd | D | D1 | n-Φd | D | D1 | n-Φd |
| 50 | 2 | 108 | 63 | 315 | 180 | 140 | 110 | 4-14 | 165 | 125 | 4-18 | 165 | 125 | 4-18 |
| 65 | 21/2 | 112 | 70 | 330 | 180 | 160 | 130 | 4-14 | 185 | 145 | 4-18 | 185 | 145 | 4-18 |
| 80 | 3 | 114 | 83 | 390 | 245 | 190 | 150 | 4-18 | 200 | 160 | 8-18 | 200 | 160 | 8-18 |
| 100 | 4 | 127 | 105 | 431 | 240 | 210 | 170 | 4-18 | 220 | 180 | 8-18 | 220 | 180 | 8-18 |
| 125 | 5 | 140 | 115 | 455 | 240 | 240 | 200 | 8-18 | 250 | 210 | 8-18 | 250 | 210 | 8-18 |
| 150 | 6 | 140 | 137 | 626 | 350 | 265 | 225 | 8-18 | 285 | 240 | 8-22 | 285 | 240 | 8-22 |
| 200 | 8 | 152 | 164 | 720 | 350 | 320 | 280 | 8-18 | 340 | 295 | 8-22 | 340 | 295 | 12-22 |
| 250 | 10 | 165 | 206 | 800 | 550 | 375 | 335 | 12-18 | 395 | 350 | 12-22 | 405 | 355 | 12-26 |
| 300 | 12 | 178 | 230 | 860 | 600 | 440 | 395 | 12-22 | 445 | 400 | 12-22 | 460 | 410 | 12-26 |
| 350 | 14 | 190 | 248 | 883 | 600 | 490 | 445 | 12-22 | 505 | 460 | 16-22 | 520 | 470 | 16-26 |
| 400 | 16 | 216 | 289 | 972 | 600 | 540 | 495 | 16-22 | 565 | 515 | 16-26 | 580 | 525 | 16-30 |
| 450 | 18 | 222 | 320 | 1043 | 750 | 595 | 550 | 16-22 | 615 | 565 | 20-26 | 640 | 585 | 20-30 |
| 500 | 20 | 229 | 343 | 1098 | 750 | 645 | 600 | 20-22 | 670 | 620 | 20-26 | 715 | 650 | 20-33 |
| 600 | 24 | 267 | 413 | 1236 | 750 | 755 | 705 | 20-26 | 780 | 725 | 20-30 | 840 | 770 | 20-36 |
| 700 | 28 | 430 | 478 | 1431 | 750 | 860 | 810 | 24-26 | 895 | 840 | 24-30 | 910 | 840 | 24-36 |
| 800 | 32 | 470 | 525 | 1488 | 750 | 975 | 920 | 24-30 | 1015 | 950 | 24-33 | 1025 | 950 | 24-39 |
| 900 | 36 | 510 | 620 | 1615 | 1250 | 1075 | 1020 | 24-30 | 1115 | 1050 | 28-33 | 1125 | 1050 | 28-39 |
| 1000 | 40 | 550 | 725 | 1765 | 1500 | 1175 | 1120 | 28-30 | 1230 | 1160 | 28-36 | 1255 | 1170 | 28-42 |
| 1200 | 48 | 630 | 780 | 1976 | 1500 | 1405 | 1340 | 32-33 | 1455 | 1380 | 32-39 | 1485 | 1390 | 32-48 |
Pneumatic Flanged 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 (Pneumatic-Open, Pneumatic-Closed)
Please provide as detailed technical specifications as possible for our production and technical team to accurately select the right product for you. Should you have any questions, feel free to call us, and we will strive to provide you with excellent service!
Pneumatic Flanged Butterfly Valve, D641X Pneumatic Soft Sealed Flanged Butterfly Valve, Pneumatic Hard Sealed Flanged Butterfly Valve
