Swing Check Valve Manufacturer in India – Speciality Valve

Speciality Valve is a Swing Check Valve Manufacturer in India, producing high-performance valves across all pressure classes and materials. Our swing check valves are engineered for reliable one-way flow, preventing reverse flow and protecting pumps, compressors, and critical equipment. Designed in accordance with API 594, API 6D, ASME B16.34, and BS 1868, they meet the most demanding industrial requirements.

Function & Working

Swing check valves operate using a hinged disc that swings open under forward flow and closes automatically when flow reverses. This mechanism ensures one-way flow, prevents reverse fluid movement, and reduces the risk of water hammer. The design offers minimal pressure drop and long service life, making it ideal for continuous operation.

Advantages of Speciality Valve Swing Check Valves

• Manufactured in ASME Class 150 to 4500 and PN 10 – PN 420

• Offered in bolted cover, pressure seal, non-slam, tilting disc, spring-assisted, and cryogenic configurations

• Top-entry options available for quick inline maintenance

• Designed for oil & gas, LNG, power, marine, and industrial pipelines

• Available in cast, forged, and exotic alloys for diverse service conditions

Types Offered

• Bolted Bonnet Swing Check Valve – reliable sealing for medium pressure classes

• Pressure Seal Swing Check Valve – compact design for high-pressure, high-temperature service

• Non-Slam Swing Check Valve – spring-assisted for preventing water hammer

• Tilting Disc Swing Check Valve – reduced slam effect, smoother closure

• Cryogenic Swing Check Valve – extended bonnet design for –196 °C LNG and cryogenic service

Industries Served

• Oil & Gas Pipelines

• Petrochemical and Refining Plants

• Power Generation (Thermal, Nuclear, Renewable)

• LNG Terminals and Cryogenic Applications

• Marine & Offshore Systems

• Water & Wastewater Treatment

• Pulp & Paper, Cement, Steel, HVAC

Technical Specifications

• Design Standards: API 594, API 6D, ASME B16.34, BS 1868, DIN EN 12334

• Pressure Class: ASME 150 – 4500, PN 10 – PN 420

• Size Range: DN 15 – DN 1200 (½” – 48”)

• End Connections: Flanged (RF, RTJ), Butt Weld (BW), Socket Weld (SW), Threaded (NPT, BSP)

• Seat Options: Metal-to-metal or resilient; hard-faced with Stellite or equivalent alloys

Body Materials Offered

Speciality Valve manufactures swing check valves in a full spectrum of materials:

• Carbon Steel: WCB, WCC, LCB, LCC, A105

• Low Alloy Steel: WC6, WC9, C12A, F11, F22

• Stainless Steel: CF8 (SS304), CF8M (SS316), CF3, CF3M, F304, F316, F321, F347

• Duplex & Super Duplex: F51, F53, F55, 2205, 2507

• Nickel Alloys: Inconel (600, 625, 800, 825), Monel (400, K500), Hastelloy (C22, C276, B2, B3)

• Special Alloys: Alloy 20, Titanium (Gr.2, Gr.5), Zirconium, Aluminium Bronze, Bronze, Brass

• Cryogenic Steels: 9% Nickel and special cryogenic stainless grades for –196 °C service

Standards & Testing

Every swing check valve is tested and certified to ensure long-term reliability and safety:

• Pressure Testing: Hydrostatic body test at 1.5 × rated pressure; seat leakage test at 1.1 × rated pressure as per API 598

• Non-Destructive Testing (NDE): Radiography (RT), Ultrasonic (UT), Magnetic Particle (MPI), and Dye Penetrant (LPT) available on request

• Material Traceability: Heat number traceability with EN 10204 3.1 / 3.2 certification

• Special Testing: Cryogenic testing (–196 °C), fire-safe testing, fugitive emission compliance (ISO 15848), and helium leak tests for critical applications