Wafer Butterfly Valve
Wafer Butterfly Valve Manufacturer
MVS Valve’s Wafer Butterfly Valve delivers a sleek, space-saving solution for flow control in tight piping systems. These valves are precision-engineered to API 609 and BS 5155 standards, ensuring reliable performance through sturdy disc construction and smooth stem bearing operation. Adjusted to fit pipelines from DN50 to DN1200 wafer butterfly valve range, they offer consistent shut-off and exceptionally low operating torque, making them ideal for both manual and automated systems.
Constructed with a wafer-style body, this valve is available with either resilient or PTFE-coated wafer butterfly valve seats, providing superior sealing and chemical resistance. For applications requiring higher purity or corrosive media handling, the stainless steel wafer butterfly valve variant ensures durability without compromising flow integrity. The PTFE lining further enhances chemical compatibility, reducing the risk of contamination in sensitive processes.
The API 609 wafer type butterfly valve design accommodates pressures up to PN 16/10 bar and even full vacuum conditions, supporting demanding industrial, water, HVAC, and light chemical applications. Added flexibility comes through ISO 5211 actuation mounting, which allows for seamless integration with manual handles or automated actuators—making this one of the best wafer butterfly valves for process industry use cases.
From its compact wafer-body and rugged seat options to standardized actuation compatibility and compliance with international standards, the MVS Wafer Butterfly Valve is a dependable, high-performance product for industries seeking effective flow control in limited spaces.
Specification
| Specification | Details |
|---|---|
| Valve Type | Concentric wafer-style butterfly valve |
| Pressure Rating | Class 150 (PN 10–16); 2″–12″ rated up to 16 bar, ≥14″ up to 10 bar |
| Size Range | DN 50–DN 1200 (2″–48″) |
| Standards | API 609 / BS 5155; face‑to‑face per ISO 5752/EN 558; tested to API 598, EN 12266‑1, ISO 5208 |
| Shut-Off Class | Class VI bubble-tight when resilient seated |
| Body Type | Wafer design, suitable for bi-directional and vacuum service |
| Torque Reduction | Upper & lower bearings reduce wear, ensure smooth rotation |
| Actuation | ISO 5211 mounting pad—lever, gearbox, pneumatic or electric |
| Operating Media | Water, gas, steam, HVAC fluids, light chemicals |
| Temperature Range | –29 °C to +200 °C (depends on seat material) |
Material of Construction
| Body | Ductile Iron (ASTM A536), Cast Carbon Steel (WCB) | Stainless Steel CF8/CF8M, CF3M, Duplex, Alloy 20, Hastelloy C‑276, Titanium |
| Disc | Ductile Iron (EN‑GJS‑400‑15) or CF8M SS | Aluminum Bronze, PFA/PTFE coated, special alloys |
| Stem | Stainless Steel 416/410/316 | Duplex SS, 17‑4PH, Monel |
| Seat / Liner | EPDM, NBR, Viton | PTFE |
| Bushings & Bearings | PTFE bushings; Acetal or bronze bearings | Graphite, high-temp variants |
| Coatings | Standard epoxy/poly powder on iron bodies | Chemical-resistant linings (e.g. food-grade, potable water) |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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Wafer Butterfly Valve
Frequently Asked Questions
Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us
What is a wafer butterfly valve and how does it work?
A concentric butterfly valve whose body is a plain ring, clamped between two pipe flanges by long bolts that pass right through it. A quarter turn swings the disc from parallel with the flow to across it, sealing into a resilient liner. Having no flanges of its own makes it the lightest and least expensive way to isolate a large bore. Operation is by lever on smaller sizes and worm gearbox as torque rises, with pneumatic or electric actuators available.
Which body, disc and seat materials are available?
Body in Ductile Iron (ASTM A536) or Cast Carbon Steel (WCB), with Stainless CF8/CF8M, CF3M, duplex and alloys on request. Disc in ductile iron (EN-GJS-400-15) or CF8M stainless, with aluminium bronze, PFA/PTFE coated and special alloys available. Seat and liner in EPDM, NBR, Viton or PTFE. The seat material sets the chemical and temperature limit, so specify the media before the body.
What size, pressure rating and shut-off class apply?
DN 50 to DN 1200 (2″–48″) at Class 150 (PN 10–16). Sizes 2″–12″ are rated to 16 bar and 14″ and above to 10 bar. Shut-off is Class VI bubble-tight when resilient seated. The wafer body is suitable for bi-directional and vacuum service.
Wafer or lug body — which should I specify?
A wafer valve is clamped between both flanges, so the line has to be sprung apart to remove it and it cannot hold pressure if downstream pipework is taken off. A lug style valve has threaded inserts and bolts to each flange independently, letting you dismantle one side while the valve still holds. Choose wafer for cost and weight in a continuous run; choose lug for end-of-line duty and anywhere maintenance isolation matters.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS has manufactured valves at its own works since 1978, is ISO 9001:2015 certified and exports across several continents. The minimum order quantity is 20 pieces. Special seat and disc materials, stainless bodies and complete pneumatic or electric actuated assemblies are built to order.