A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which 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 of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, and/or inexpensive. 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. The bodies (external shells) of most check valves are made of plastic or metal. We are one of the main Check valves manufacturers in China. We supplies: ball check valve, diaphragm check valve , swing check valve or tilting disc check valve, stop check valve, lift check valve or piston check valve, in-line check valve, duckbill valve and wafer check valve, stainless steel check valve etc；Size ranges from 1/2’’ to 24’’. We can manufacture and supply Check Valves according to your requirements，please feel free to contact us !
