Wafer Butterfly Valve
Valves Only is a leading Wafer Butterfly Valve Supplier in USA, designing valve to control and isolate flow in pipelines without taking up much space. The wafer body fits neatly between two flanges, making installation simple and cost-efficient. These valves are used in water treatment plants, power stations, chemical facilities, and marine systems where lightweight construction, quick operation, and easy maintenance are important. Each valve is built to handle a wide range of fluids while maintaining reliable operation over many cycles.
How Wafer Butterfly Valves Work
A wafer butterfly valve controls flow using a circular disc fixed to a central shaft. Turning the disc a quarter of a turn allows or blocks flow through the pipeline. The wafer design is clamped between flanges with bolts that pass around the body, which keeps the valve centered and secure. This structure makes the valve lighter than flanged types and reduces the need for additional fittings. It can be operated manually with a lever or gearbox, or automatically using pneumatic or electric actuators.
Benefits
- Compact and lightweight construction that fits easily into existing lines
- Quick quarter-turn operation for opening and closing
- Simple design with fewer parts, reducing maintenance needs
- Minimal pressure drop when the valve is fully open
- Suitable for both isolation and flow regulation tasks
- Available in different materials to match service conditions
Design Standards
- Manufacture & Design: API 609, ASME B16.34, ISO 5752
- Face-to-Face Dimensions: EN 558, ASME B16.10
- Flange Drilling: ASME B16.5, EN 1092
- Testing Standards: API 598, ISO 5208
Inspection & Testing Standards
- API 598 – Hydrostatic and seat leakage testing
- ISO 5208 – Pressure and sealing verification
- MSS SP-67 – Construction and testing of butterfly valves
- EN 12266-1 – Strength and leakage checks for metallic valves
Body & Trim Material Compatibility
| Category | Material / Grade | Standards / Specifications | Typical Applications |
|---|---|---|---|
| Cast Iron | GGG40, GGG50 | EN 1563 | Water distribution and low-pressure service |
| Ductile Iron | ASTM A536 | ASTM | Wastewater, power, and general industrial systems |
| Carbon Steel | WCB, LCC | ASTM A216 / ASTM A352 | Oil, gas, and high-pressure water lines |
| Stainless Steel | CF8, CF8M, CF3M | ASTM A351 | Chemical plants and seawater systems |
| Duplex Steel | F51 (2205), F60 | ASTM A182 | Offshore and desalination applications |
| Super Duplex | F55 (2507) | ASTM A182 / ASTM A890 | High-chloride and corrosive environments |
| Aluminium Bronze | C95400, C95800 | ASTM B148 | Brackish water and marine cooling systems |
| Alloy 20 | CN7M | ASTM B462 | Acidic and chemical process pipelines |
| Hastelloy | C22, C276 | ASTM B574 / ASTM B564 | Corrosive and high-temperature chemical service |
Industries Served
- Water & Wastewater Treatment – Used for controlling flow in treatment and distribution systems.
- Power Generation – Handles cooling water, condensate, and auxiliary process lines.
- Oil & Gas – Installed in pipelines for isolation and line control.
- Chemical & Petrochemical – Manages corrosive or high-temperature media.
- Marine & Offshore – Used in ballast systems, seawater lines, and cargo operations.
- Steel & Mining – Service in cooling water and gas handling lines.
- Pulp & Paper – Regulates process water and pulp slurry circulation.
Special Features
- Slim wafer body fits between standard flanges without alignment issues
- Low-torque design reduces operator effort
- Choice of soft or metal seats based on service fluid and pressure
- Can be supplied with lever, gearbox, pneumatic, or electric actuators
- Bi-directional sealing suitable for both vacuum and pressure service
- Customisation available in materials, seat type, and actuation for plant-specific applications
