Product Name & StandardsWafer Ball ValveCompliant with API 608, ASME B16.34, ANSI B16.5, and MSS-SP-81 standards.
Core DefinitionA widely used flow control device for piping systems, engineered to regulate the flow of liquids and gases. It earns the name "wafer" due to its thin, disk-like profile, which enables a snug fit between two flanges without requiring an integral flange on the valve itself. The "ball" refers to the spherical disc at the valve’s core, which controls fluid flow through rotational movement.
Structure & Working Principle
- Key Components: Thin disk-shaped valve body, spherical flow-control disc (ball) with a central through bore, valve stem, and manual lever handle (or quarter-turn actuator).
- Operating Mechanism: Rotating the handle 90 degrees drives the valve stem and spherical disc—when the disc’s through bore aligns with the pipeline, fluid flows freely; when rotated to block the flow path, it shuts off or regulates flow. The wafer design allows the valve to be clamped directly between two pipe flanges, secured by bolts passing through the valve body’s bolt holes.
- Connection Method: Wafer-type installation – No integral flanges on the valve; relies on pipeline flanges and through-bolts for secure, leak-tight fixation.
Performance Advantages
- Compact design: Thin, disk-like profile saves installation space, ideal for piping systems with limited clearance.
- Lightweight & cost-effective: Simplified structure reduces material usage, lowering overall weight and procurement costs compared to flanged ball valves.
- Low flow resistance: Spherical disc and full-bore (or reduced-bore) design minimizes pressure loss, ensuring efficient fluid transmission.
- Easy installation: Clamps directly between flanges without additional flange alignment, streamlining on-site assembly.
- Reliable sealing: Precision-machined spherical disc and valve seat deliver consistent leak-proof performance in long-term operation.
Key Specifications
- Pressure Rating: PN10 – PN250 / Class 150 – 1500.
- Operating Temperature: -29℃ – 425℃ (carbon steel body) / -196℃ – 550℃ (stainless steel body).
- Body Materials: Carbon Steel (A216 WCB), Stainless Steel (A351 CF8/CF8M), Ductile Iron (ASTM A395).
- Ball Core Material: Stainless Steel (304L/316L), Alloy Steel (for high-pressure applications).
- Sealing Material: PTFE (Polytetrafluoroethylene), RPTFE (Reinforced PTFE) – ensures chemical resistance and tight sealing.
- Size Range: DN15 – DN300 (NPS 1/2" – 12") – compatible with standard flange sizes.
Application Fields
- Industrial Piping Systems: Oil & gas transmission, chemical processing, petrochemicals, power generation, water treatment, and metallurgy.
- Commercial & Infrastructure: HVAC systems, municipal water/gas supply networks, fire protection pipelines, and compressed air lines.
- Specialized Scenarios: Piping systems with space constraints, low-to-medium pressure fluid control, and applications requiring cost-effective, compact flow control solutions.