Description
Buy Butterfly Valve D671X/F D641X/F PN10/16 Cast Iron Wafer & Flanged Pneumatic Operated
The VALVEHU Pneumatic Soft-Sealing Butterfly Valve is an industrial-grade flow control device designed for precision and durability across various pipeline systems. Available in both wafer (D671X/F) and flanged (D641X/F) types, this butterfly valve integrates a pneumatic actuator for quick and efficient open-close or modulating control, making it an ideal solution for automated flow systems.
Manufactured from high-quality cast iron and equipped with soft-seal options like NBR, EPDM, FKM, and PTFE, this valve delivers reliable sealing performance even in corrosive environments. It supports a wide nominal diameter range from DN40 to DN1600, with pressure ratings of PN10 and PN16. Its robust construction and customizable sealing materials make it suitable for applications such as water treatment, air systems, low-pressure steam, and general industrial pipelines.
The dual-acting and spring-return pneumatic options allow flexible control strategies depending on system requirements. Its compact design minimizes installation space while ensuring excellent flow characteristics and minimal pressure loss. The modular actuator interface allows easy maintenance and integration with control systems.
VALVEHU’s butterfly valve lineup is engineered for high performance, cost efficiency, and longevity. Whether you’re retrofitting an existing setup or designing a new automation system, this product delivers both reliability and control accuracy.
If you’re unsure which butterfly valve model fits your specific project, the engineering team at VALVEHU is ready to assist. Our team in China provides full technical support to help you select the optimal configuration for your application.
Technical Specifications
Valve Type: Pneumatic soft-sealing butterfly valve
Body Material: Cast Iron
Connection Type: Wafer and Flanged
Pressure Rating: PN10 and PN16
Nominal Diameter Range: DN40 to DN1600
Sealing Options: NBR, EPDM, FKM, PTFE
Actuation Type: Single-acting or double-acting pneumatic
Working Media: Water, air, low-pressure steam, weak acids
Max Operating Pressure: Up to 16 bar
Actuator Pressure Range: 3–8 bar
Dimensional Specifications of Wafer Type Soft Sealing Pneumatic Butterfly Valve
| Nominal Diameter DN | L | L1 | H | Flange Size D (10 bar) | Flange Size D (16 bar) | Bolt Pattern n–d (10 bar) | Bolt Pattern n–d (16 bar) |
|---|---|---|---|---|---|---|---|
| 50 | 43 | 141 | 269 | 125 | 125 | 4–18 | 4–18 |
| 65 | 46 | 159 | 283 | 145 | 145 | 4–18 | 8–18 |
| 80 | 46 | 159 | 289 | 160 | 160 | 8–18 | 8–18 |
| 100 | 52 | 211 | 320 | 180 | 180 | 8–18 | 8–18 |
| 125 | 56 | 248 | 351 | 210 | 210 | 8–18 | 8–18 |
| 150 | 56 | 269 | 380 | 240 | 240 | 8–22 | 8–22 |
| 200 | 60 | 345 | 435 | 295 | 295 | 8–22 | 12–22 |
| 250 | 68 | 409 | 509 | 350 | 350 | 12–22 | 12–26 |
| 300 | 78 | 438 | 597 | 400 | 410 | 12–22 | 12–26 |
| 350 | 78 | 550 | 653 | 460 | 470 | 16–22 | 16–26 |
| 400 | 102 | 550 | 720 | 515 | 525 | 16–26 | 16–30 |
| 450 | 114 | 600 | 772 | 565 | 585 | 20–26 | 20–30 |
| 500 | 127 | 633 | 867 | 620 | 650 | 20–26 | 20–33 |
| 600 | 154 | 730 | 998 | 725 | 770 | 20–26 | 20–36 |
Basic Technical Parameters of Pneumatic Butterfly Valve
| Specification Item | Description |
|---|---|
| Actuation Method | Single-acting: Air to open/close, spring to close/openDouble-acting: Air on/off with position unchanged |
| Applicable Media | Various liquids, gases, oils, and corrosive media |
| Nominal Diameter | 40–1600 mm |
| Connection Type | Wafer type, Flanged type |
| Pressure Range | 0–16 bar |
| Air Supply Pressure | 3–8 bar |
| Valve Body Material | Cast iron, Ductile iron, Cast steel, Stainless steel, Plastic |
| Sealing Material | NBR, EPDM, FKM, PTFE (lined), Lined rubber |
Dimensional Specifications of Flanged Type Soft Sealing Pneumatic Butterfly Valve (Unit: mm)
| DN (Nominal Diameter) | L | L1 | L2 | H | D (10 bar) | D (16 bar) | D1 (10 bar) | D1 (16 bar) | n–d (10 bar) | n–d (16 bar) |
|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 108 | 141 | 71 | 82.5 | 165 | 165 | 125 | 125 | 4–18 | 4–18 |
| 65 | 112 | 159 | 83 | 92.5 | 185 | 185 | 145 | 145 | 4–18 | 8–18 |
| 80 | 114 | 159 | 83 | 100 | 200 | 200 | 160 | 160 | 8–18 | 8–18 |
| 100 | 127 | 211 | 95 | 110 | 220 | 220 | 180 | 180 | 8–18 | 8–18 |
| 125 | 140 | 248 | 107 | 125 | 250 | 250 | 210 | 210 | 8–18 | 8–18 |
| 150 | 140 | 269 | 123 | 142.5 | 285 | 285 | 240 | 240 | 8–22 | 8–22 |
| 200 | 152 | 345 | 152 | 170 | 340 | 340 | 295 | 295 | 8–22 | 12–22 |
| 250 | 250 | 409 | 172 | 197.5 | 395 | 405 | 350 | 355 | 12–22 | 12–26 |
| 300 | 270 | 438 | 187 | 222.5 | 445 | 460 | 400 | 410 | 12–22 | 12–26 |
| 350 | 290 | 550 | 215 | 252.5 | 505 | 520 | 460 | 470 | 16–22 | 16–26 |
| 400 | 310 | 550 | 215 | 282.5 | 565 | 580 | 515 | 525 | 16–26 | 16–30 |
| 450 | 330 | 600 | 240 | 307.5 | 615 | 640 | 565 | 585 | 20–26 | 20–30 |
| 500 | 350 | 633 | 262 | 335 | 670 | 715 | 620 | 650 | 20–26 | 20–33 |
| 600 | 390 | — | — | 390 | 780 | 840 | 725 | 770 | 20–30 | 20–36 |
| 700 | 430 | — | — | 447.5 | 895 | 910 | 840 | 840 | 24–30 | 24–36 |
| 800 | 470 | — | — | 507.5 | 1015 | 1025 | 950 | 950 | 24–33 | 24–39 |
| 900 | 510 | — | — | 557.5 | 1115 | 1125 | 1050 | 1050 | 28–33 | 28–39 |
| 1000 | 550 | — | — | 615 | 1230 | 1255 | 1160 | 1170 | 28–36 | 28–42 |
| 1200 | 630 | — | — | 727.5 | 1455 | 1458 | 1380 | 1390 | 32–39 | 32–48 |
FAQ
What is the maximum pressure supported by this butterfly valve?
The valve supports up to PN16, equivalent to 16 bar operating pressure.
Can I choose different sealing materials for different media?
Yes, sealing options include NBR, EPDM, FKM, and PTFE based on media compatibility.
What actuator types are available for this butterfly valve?
Both single-acting and double-acting pneumatic actuators are supported.
Is this valve suitable for corrosive or chemical media?
Yes, when paired with PTFE or FKM seals, it’s compatible with weak acids and corrosive media.
What size ranges are available for this butterfly valve?
The valve is available from DN40 to DN1600, covering a wide range of industrial uses.
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