Swing Check Valve
Traditional hinged disc design for horizontal or vertical upward flow applications.
Technical Specifications
| Type | Swing (Top Hinged) |
| Size Range | 1/2" to 36" (15 mm to 900 mm) |
| Body Materials | CI, DI, Carbon Steel, Stainless Steel |
| Disc Material | Bronze, SS304, SS316, Stellite faced |
| Seat Material | Metal, Resilient (EPDM, NBR) |
| End Connections | Wafer, Flanged, Screwed |
| Pressure Rating | PN10 / PN16, Class 150 / 300 |
| Standards | API 6D, BS 1868, API 594 |
Applications
Pump discharge, backflow prevention, water systems
About the Swing Check Valve
The swing check valve is the most widely used non-return valve type in global industrial and municipal piping, valued for its simplicity, reliability, and low pressure drop in fully open position. The disc is hinged at the top of the body on a hinge pin and swings freely through an arc from the fully open (disc parallel to flow, pivoted back against the valve body) to the fully closed position (disc perpendicular to the seat face, blocking reverse flow). With no springs or external mechanisms, the swing check is extremely simple - only two moving parts (the disc and the hinge pin) - making it highly reliable in clean, non-pulsating flow service.
The main limitation of the swing check valve is its closure behaviour: the disc does not begin to close until the forward flow velocity drops to near-zero and then reverses direction momentarily. This means that on pump trip, the disc can swing through a large arc and impact the seat at high velocity - generating a loud "slam" and a water hammer pressure wave that can damage the valve, adjacent piping, and instrumentation. In applications where water hammer is a concern, spring-assisted or weighted-disc swing check valves, or dual plate check valves, are preferred. Vajra Industrial Solutions supplies swing check valves from 1/2" to 36" in Cast Iron, Ductile Iron, Carbon Steel WCB, and SS316 to API 6D, BS 1868, and API 594.
Where It's Used
Key industries and applications for the Swing Check Valve
Pump discharge
Cast Iron or Carbon Steel swing check valves on pump discharge in municipal water supply, irrigation pumping stations, and HVAC chiller plants; horizontal installation ensures gravity assists disc closure; resilient EPDM seat for water systems
Backflow prevention in water distribution
Ductile Iron swing check valves in potable water main connections, service entries, and hydrant feeds; WRAS-approved EPDM seat for drinking water compliance; tamper-resistant design for public infrastructure
Gravity drainage and sewer systems
large-bore Cast Iron swing check valves (12"–36") on stormwater drainage outfalls and sewage rising main terminals to prevent backflow during flood events; low cracking pressure critical for gravity-flow applications
Oil and gas production
Carbon Steel or SS316 swing check valves on wellhead production manifolds, test separator returns, and produced water reinjection; Stellite-faced seat and disc for erosive service with sand-laden crude
Chemical and industrial process lines
SS316 swing check valves on chemical make-up pump discharge, metering pump outlet, and process liquid transfers; full metal-to-metal seat for high-temperature service above 200°C where elastomers fail
How to Choose the Right Swing Check Valve
Swing check valves are the correct choice for horizontal or vertical upward pipe runs with steady, non-pulsating flow where water hammer on pump trip is not a critical concern. Do not install swing check valves in vertical downward flow - gravity prevents disc closure, allowing uncontrolled back-flow. For pump discharge with water hammer risk, use a dual plate check valve or spring-assisted swing check with controlled closure rate. Size the swing check so the forward flow velocity through the valve is at least 0.6 m/s to ensure the disc swings fully open and does not flutter at the hinge.
Popular Configurations
Most commonly ordered specifications for the Swing Check Valve
Frequently Asked Questions
About Swing Check Valve - ordering, specs, delivery & compliance
What standards does the Swing Check Valve comply with?+
Our Swing Check Valve complies with API 6D, BS 1868, API 594. 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 Swing Check Valve?+
The Swing Check Valve is available in CI, DI, Carbon Steel, Stainless Steel. Material selection depends on your process fluid, temperature, pressure, and corrosion requirements.
What is the delivery lead time for Swing 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 Swing 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 Swing Check Valve?+
The Swing Check Valve is available in pressure ratings of PN10 / PN16, Class 150 / 300. 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 Swing 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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Spring Loaded Check Valve
Non-slam design with spring-assisted closure for water hammer prevention.
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