Swing Check Valves sourcingAbout Swing Check Valves
Hinged-disc swing check valves for water, oil and process pipelines, DN40 to DN1200, in cast iron, ductile iron, WCB carbon steel and stainless grades to BS 1868 and IS 5312.
A swing check valve is a non-return valve in which a disc hinged at the top of the body swings open under forward flow and swings back onto an inclined seat when flow stops or reverses, preventing backflow through the line. It is the default check valve for waterworks, pump discharge, fire mains and general process pipework because it gives a full, unobstructed bore with very low pressure drop when open, and it tolerates water carrying silt or soft solids. Indian manufacturers commonly supply swing checks in cast iron and ductile iron for water service, WCB cast carbon steel for oil, gas and steam, and CF8 or CF8M stainless for corrosive duties, with flanged ends to ASME B16.5, IS 1538 or EN 1092 and sizes typically DN40 to DN1200. Steel valves are generally built to BS 1868 with face-to-face dimensions to ASME B16.10, pressure-temperature ratings to ASME B16.34 and testing to API 598; waterworks valves follow IS 5312 or AWWA C508, and cast iron valves may be ordered to EN 12334. Options include lever-and-weight or lever-and-spring assemblies for faster closure on pump discharge duty and multi-door designs for large bores. When enquiring, state size, pressure class or PN rating, body and trim materials, end connection, service medium and temperature, installation orientation and quantity.
