Check Valves
Check valves are engineered in strict accordance with BS 1868 and ASME B16.34 standards to provide reliable backflow prevention. These valves feature a bolted cover design and a swivel disc assembly, ensuring optimal sealing and structural integrity under high-pressure conditions. Available in different size and pressure class, they are constructed from premium materials like carbon steel, low-temperature alloys, and stainless steel to withstand diverse thermal environments. Designed for critical industrial infrastructure, our swing check valves deliver high-performance non-return functionality across the refinery, chemical, power, LNG, and pipeline sectors. Every unit undergoes rigorous testing per API 598 for global engineering compliance. This series is optimized for low pressure drop and long-term durability in severe process services, ensuring the protection of pumps and upstream equipment.
Design Features & Core Benefits
Non-Slam Swing Disc Design
Swing disc and guided hinge design provide stable seating, reduced water hammer and reliable non-return performance in horizontal and vertical (upward flow) lines.
Robust Body–Cover Sealing
Graphite or spiral-wound gaskets for Class 150–600 and ring-type joints for Class 900 and above provide reliable body–cover sealing at high temperature and pressure.
Stellite-Hardfaced Seats & Disc
Seat and disc hardfaced with Stellite 6 are standard, delivering long service life in severe non-return and isolation duties.
Hinge Pin & Boss Design
Internal hinge pin design with accessible bosses allows full disc movement, secure retention and easier inspection or maintenance.
Wide Material & Size Range
Covers 2"–64" (DN50–DN1600) in carbon steel, alloy and stainless materials for refinery, chemical, LNG and pipeline applications.
Serviceability & Testing
Renewable seats, accessible internals and testing per API 598 / EN 12266 support reliable operation and easier overhaul planning.
Technical Specifications
Size Range
2"–64" (DN50–DN1600) depending on class and type
Pressure Rating
ASME Class 150–4500 (PN16–PN760)
Temperature Range
Up to high-temperature service per material class (see GGC Neway catalog E-GGC-2025)
Body Materials
ASTM A216 WCB; A352 LCB/LCC; A217 WC6/WC9/C5/C12/C12A; ASTM A351 CF8/CF8M/CF3/CF3M; CN7M
Special Features
Swing, piston, tilting disc, dual-plate and axial flow designs available; Stellite hardfacing and low fugitive emission options.
End Connections
RF and RTJ flanges per ASME B16.5; Butt-weld ends per ASME B16.25; wafer and lug types for dual-plate designs.
Design Codes
BS 1868, API 6D, API 594, ASME B16.34; testing per API 598 / EN 12266
Applications
Refining, chemical, coal chemical, LNG, power, marine and pipeline services requiring reliable non-return and protection of upstream equipment.
Industrial Applications & Services
Refining & Petrochemical Units
Non-return protection for pumps, compressors and process lines in crude, vacuum, hydroprocessing and clean-fuel units.
Chemical & Coal Chemical Plants
Handles aggressive media and high-temperature services in chemical and coal chemical plants with carbon steel, alloy and stainless body options.
Power & Feedwater Systems
Check valves for boiler feedwater, condensate and auxiliary services in fossil and combined-cycle power plants.
LNG, Marine & Air Separation
Engineered for LNG, marine and air separation systems where reliable non-return and low pressure loss are critical.