Dual Plate Check Valve
Compact wafer-style check valve with twin spring-loaded plates for quick closure.
Technical Specifications
| Type | Dual Plate (Wafer) |
| Size Range | 2" to 48" (50 mm to 1200 mm) |
| Body Materials | Carbon Steel, Stainless Steel, Duplex |
| Disc Material | SS304, SS316, Duplex |
| Spring Material | SS316, Inconel |
| End Connections | Wafer (between flanges) |
| Pressure Rating | PN10 / PN16 / PN25, Class 150 / 300 / 600 |
| Standards | API 594, API 6D |
Applications
Compressor discharge, pipelines, high-velocity flow
About the Dual Plate Check Valve
The dual plate check valve - also known as double door check valve - is a compact, wafer-style non-return valve that uses two spring-loaded semicircular plates hinged on a central horizontal pin to prevent reverse flow. Unlike swing check valves where the disc must travel through a wide arc before closing, the dual plate check's plates only need to rotate 90 degrees from full-open to closed - a much faster closure stroke that dramatically reduces the water hammer transient on pump trip or compressor shutdown.
The spring loading in the dual plate check valve means the plates begin closing before flow reversal occurs - at zero velocity - rather than waiting for reverse flow to push them shut. This non-slam behaviour eliminates the pressure spike (water hammer) that damages pumps, pipelines, heat exchangers, and instrumentation. The wafer face-to-face dimension is typically 1/3 to 1/5 that of a comparable swing check, making dual plate checks the preferred choice wherever space or weight is a concern: offshore platforms, compressor stations, high-rise buildings, and FPSO vessels.
Vajra Industrial Solutions supplies dual plate check valves in 2" to 48" in body materials of Carbon Steel (WCB), Stainless Steel (CF8M), Duplex, and Super Duplex, with disc and spring materials to match. Pressure classes PN10 to PN40 (Class 150 to 600) are stocked in common sizes. All valves meet API 594 and API 6D.
Where It's Used
Key industries and applications for the Dual Plate Check Valve
Pump discharge headers
dual plate check valves sized for full pump flow velocity (2–4 m/s) prevent reverse rotation and water hammer on sudden pump trip; preferred over swing checks in multi-pump stations for faster closure
Compressor discharge lines
SS316 dual plate check valves with Inconel springs rated for high-cycle service in gas compression trains where pressure reversals occur frequently at start/stop
High-rise building and district cooling systems
compact wafer face-to-face dimensions make dual plate checks the preferred choice in plant rooms, risers, and congested mechanical cores
Offshore FPSOs and platforms
weight-critical applications benefit from the short face-to-face; Duplex 2205 construction for sour gas and seawater injection service with NACE MR0175
Pipeline and process headers
horizontal or vertical upward flow installation; provides reliable non-return service in oil, gas, water, and chemical pipeline systems
How to Choose the Right Dual Plate Check Valve
Select a dual plate check valve for pump or compressor discharge applications where water hammer risk is present, where space between flanges is limited, or where the piping system includes vertical upward flow segments. Size the valve based on actual flow velocity - not pipe bore - targeting 2–4 m/s through the valve. Avoid dual plate check valves on vertical downward flow; use a spring-assisted lift check or tilting disc check instead.
Popular Configurations
Most commonly ordered specifications for the Dual Plate Check Valve
Frequently Asked Questions
About Dual Plate Check Valve - ordering, specs, delivery & compliance
What standards does the Dual Plate Check Valve comply with?+
Our Dual Plate Check Valve complies with API 594, API 6D. All products are manufactured to international standards and come with full material test reports (MTR), dimensional inspection reports, and hydrostatic test certificates on request.
What materials are available for the Dual Plate Check Valve?+
The Dual Plate Check Valve is available in Carbon Steel, Stainless Steel, Duplex. Material selection depends on your process fluid, temperature, pressure, and corrosion requirements.
What is the delivery lead time for Dual Plate Check Valve?+
Standard stock sizes are available for immediate dispatch from our Vadodara warehouse. Custom sizes and special materials typically have a lead time of 2–6 weeks depending on specifications. We serve customers across India within 1–7 business days and export to the Middle East, Southeast Asia, Europe, and the Americas with full export documentation.
Can I get a custom Dual Plate Check Valve for a specific application?+
Yes. Vajra Industrial Solutions supplies custom-engineered check valves for specific process conditions. Submit your technical requirements - including pressure class, temperature range, fluid type, end connections, and any special trim or coating needs - via our RFQ form or WhatsApp, and our engineering team will respond within 24 hours.
What pressure ratings are available for the Dual Plate Check Valve?+
The Dual Plate Check Valve is available in pressure ratings of PN10 / PN16 / PN25, Class 150 / 300 / 600. Higher-pressure classes are available for critical service applications in oil & gas, power generation, and chemical processing.
How do I request a quote for the Dual Plate Check Valve?+
You can request a quote by clicking the "Request Quote" button on this page, filling out our RFQ form at vajravyuh.com/rfq, emailing us at sales@vajravyuh.com, or WhatsApping us directly at +91-9979774557. Please include quantity, size, pressure class, material grade, and end-connection type for the fastest response.
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Other Check Valves
Swing Check Valve
Traditional hinged disc design for horizontal or vertical upward flow applications.
View Details →
Lift Check Valve
Piston or ball type lift check for vertical flow and high-pressure applications.
View Details →
Spring Loaded Check Valve
Non-slam design with spring-assisted closure for water hammer prevention.
View Details →
Tilting Disc Check Valve
Pivoting disc design with low cracking pressure and near-silent non-slam closure for large pipelines.
View Details →