Wafer-Type Butterfly Valve
The Test Torque for a Wafer-type Butterfly Valve depends on the Nominal Diameter (DN) and the Pressure Rating (PN). Below is a typical torque chart that provides approximate values for opening torque at various valve sizes. These values can vary depending on the valve design, material, and application.
Wafer-Type Butterfly Valve
The Wafer-Type Butterfly Valve is a compact, lightweight, and versatile quarter-turn valve designed for regulating, throttling, and isolating fluid flow in pipelines. Its wafer-style design allows the valve to be sandwiched between two flanges, minimizing space requirements and simplifying installation.
Featuring a resilient or high-performance disc seal, the wafer-type butterfly valve provides reliable bi-directional shut-off, low operating torque, and long service life. The valve is suitable for water, wastewater, chemicals, gases, and other industrial media. Its cost-effective design, ease of operation, and low maintenance make it ideal for municipal, industrial, and chemical process systems.
Body Materials
Disc Materials
Seat Materials
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | Wafer-Type Butterfly Valve |
| Valve Type | Wafer Butterfly Valve, Resilient or High-Performance Seated |
| Nominal Size | DN50–DN2000 (2"–80") |
| Pressure Rating | PN10–PN25 / ANSI Class 150–300 |
| Body Material | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Disc Material | Stainless Steel, Ductile Iron, Alloy Steel |
| Seat Material | EPDM, NBR, Viton, PTFE, RPTFE |
| Connection Type | Wafer (Sandwiched between flanges) |
| Flange Standard | ANSI, DIN, EN, JIS, GB |
| Operating Temperature | -20°C to +180°C (depending on seat material) |
| Maximum Working Pressure | Up to 2.5 MPa |
| Leakage Class | ISO 5208 Rate A / Zero Leakage (soft seat) |
| Operation Type | Manual Lever, Gearbox, Pneumatic, Electric |
| Stem Material | SS304, SS316 |
| Face-to-Face Standard | EN 558, API 609 |
| Design Standard | API 609, EN 593 |
| Inspection & Testing | ISO 5208, EN 12266, API 598 |
| Applicable Media | Water, Wastewater, Chemicals, Gases, Air, Neutral Liquids |
Industry Applications
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
