Check Valves – Petrochemical
Design: Swing Check, Piston Check, Nozzle Check and Wafer Single, Dual and Spring Check.
Typical Applications: Gas Processing, Petrochemical, Chemical, Power and Mining.
End Connections: Flanged (ANSI), Wafer, Socket Weld and Screwed (BSP or NPT).
Pressure Class Range: Class 150 to 1500.
Sizes: DN50 — DN1800 (2” to 72”).
Body Materials: Forged and Cast Carbon Steel and Stainless Steel, Cast Iron, Ductile Iron, PFA / PTFE Lined and Exotics.
Seat & Seal Materials: Virgin PTFE, Reinforced PTFE, PFA, Viton, NBR, EPDM and Metal.
Accessories: Lever Arm / Counter Weight and Special Adaptions.
Quality: Pressure Tests - API 598.
Standards: Design, Production and Testing: ASME, ANSI, API 6D, and ASTM. Quality System: EN ISO 9001:2008, EN ISO 14001:2004.
Brands: Brooks, Abacus, Bonney Forge, Velan and Kitz.
Design Details: A check valve or non-return valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction, minimising and preventing backflow.
Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.