Pneumatic Fluoropolymer-Lined Wafer Butterfly Valve
D671 series · Fluoropolymer-lined wafer butterfly valve
Product overview
The D671 pneumatic fluoropolymer-lined wafer butterfly valve covers DN50~500, with pressure ratings of 1.0, 1.6MPa and flange compatibility with Chinese, US and Japanese standards. Body options are WCB carbon steel or CF8/CF8M stainless steel. The full F4/F46 fluoropolymer lining provides exceptionally high resistance to strong acids, strong alkalis and oxidizers.
Available with double-acting or single-acting spring-return pneumatic actuators; the single-acting version returns automatically to closed on air loss. The lightweight wafer design requires no matching flanges and offers easy installation, a small footprint and low flow resistance. It supports both on/off shutoff and flow regulation. Its integral raised mounting platform accommodates solenoid valves, valve positioners, limit switches, FRL units and manual overrides as a complete automation package.
Core technology and operating parameters
| Product model | D671 |
| Size range | DN50~500 mm |
| Pressure rating | 1.0, 1.6 MPa; 125LB, 150LB; 10K |
| Dimensional standards | Chinese, US, Japanese standards |
| Body material | carbon steel WCB, stainless steel CF8/CF8M |
| Lining material | F4, F46 |
| Action type | Double-acting, single-acting (spring-return) |
| Control mode | On/off, modulating |
| Optional accessories | Solenoid valve, valve positioner, limit switch, three-piece air preparation unit (FRL), manual override |
Core construction and design advantages
WCB carbon steel or CF8/CF8M stainless steel body options
F4/F46 fluoropolymer lining with exceptional resistance to severe corrosion
Double-acting and single-acting spring-return drives
On/off shutoff and flow regulation modes
Wafer design for simple, space-saving installation
Full pneumatic accessory options including solenoid valves and valve positioners
Low flow resistance and reduced scaling and crystallization
Corrosion-resistant lining withstands heat and aging
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