Pneumatic Wafer Butterfly Valve
Standard wafer butterfly valve for rapid high-flow shutoff.
Product overview
This pneumatic wafer butterfly valve covers DN50~500 and pressures of 1.0, 1.6MPa, matching Chinese and US piping standards. Body, disc and seat materials are available for water supply and drainage, HVAC, food and chemical service. Its easy-to-install, compact wafer design offers low flow resistance and economical rapid switching and high-flow shutoff.
Equipped with double-acting or single-acting spring-return pneumatic actuators, with automatic closing on air loss, it supports on/off and flow regulation. A raised stem platform accepts solenoid valves, valve positioners, limit switches and a full range of automation accessories for remote automation. Remote automatic and local manual control are both supported. Smooth operation, reliable sealing and good overall value make it a common automated butterfly valve for industrial fluid piping.
Core technology and operating parameters
| Model | D671 |
| Nominal size | DN50~500 mm |
| Pressure | 1.0, 1.6 (MPa); 125LB, 150LB; 10K |
| Dimensional standards | Chinese, US standards |
| Body material | carbon steel (WCB), stainless steel (CF8, CF8M) |
| Seat material | Nitrile rubber, EPDM rubber, fluoroelastomer, food-grade rubber |
| Disc material | Chrome-plated, 304, 316, 316L, nylon-coated |
| Action type | Double-acting, single-acting (spring-return) |
| Control mode | Two-position shutoff (on/off), modulating |
| Accessory options | Solenoid valve, valve positioner, limit switch, three-piece air preparation unit (FRL), manual override |
Core construction and design advantages
Model D671, sizes DN50~500, multiple pressure ratings
Multiple disc and seat materials for different media
Double-acting and single-acting spring-return drive options
Supports on/off and flow regulation
Wafer design is easy to install and compact
Full accessory options including solenoid valves, valve positioners and manual overrides
Wear and corrosion resistance for long service life
Easy maintenance reduces operating costs
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