A check valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. 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...
In China standard of GB/T 12229 General Purpose Industrial Valve Specification of Carbon Steel Casting. The chemistry and mechanical property are same as A216 WCB. It is same as Chinese casting material of ZG250-485 APPLICATIONS Valve bodies/bonnet. w w w . c a s t i n g q u a l ...