Dual Plate Wafer Check Valve Manufacturer in India

A dual plate wafer check valve uses two spring-assisted plates within a compact wafer body to provide automatic reverse-flow protection. The short closing travel and centrally supported plates make this arrangement suitable where installation space, closing response and pressure loss are important design considerations. Speciality Valve offers configurations for process, water, hydrocarbon, power and marine piping, with construction determined by pressure class, temperature, body material, seat arrangement and line size.

Dual Plate Wafer Check Valve Technical Specifications:

Materials Used for Body and Internal Parts:

Material suitability depends on temperature, fluid chemistry, pressure and the complete wetted construction.

Material Grades and Valve Components:

Plate and Spring Arrangement:

• Dual plates: Independent plates reduce the travel required for closure.

• Spring loading: Springs assist closure as forward flow velocity decreases.

• Central hinge: Supports plate movement within the body.

• Short stroke: Reduces the time required for the plates to return toward the seat.

• Non-slam response: Proper spring selection can reduce reverse-flow development.

• Seat contact: Closure performance depends on seat geometry, pressure differential and material compatibility.

• Flow passage: The open position provides a relatively direct flow path through the compact body.

Where This Configuration Is Applied?

• Pump Discharge: Prevents reverse flow after pump shutdown.

• Cooling-Water Lines: Maintains flow direction in circulating systems.

• Water Treatment: Protects pumps and equipment from backflow.

• Hydrocarbon Piping: Provides non-return protection in compatible services.

• Chemical Lines: Used where materials suit the process medium.

• Power Plant Utilities: Applied in suitable water and utility piping.

• Marine Piping: Suitable corrosion-resistant construction can be used for seawater service.

Wafer Dimensions and Pressure Arrangement:

Applicable Standards and Testing:

• API 594: Check valve requirements covering wafer and lug configurations.

• ASME B16.34: Pressure-temperature ratings, materials, testing and marking.

• ASME B16.10: Applicable face-to-face dimensions.

• API 598: Inspection and pressure testing.

• ISO 5208: Leakage-rate and pressure-testing requirements where specified.

For a project-specific configuration, provide the line size, pressure, temperature, medium, flange standard and required seat material so the appropriate plate, spring and body construction can be established.