Non-return valve

摘要

The sealing face (36) of the plug (32) moved by the pressure of the medium handled shuts off the opening (44) in the valve body (18), which forms a guide for it. The plug can consist of a domed disc concave towards the body, and which has an axial extension (38) through a hub (26) on the body. The extension can have a larger-diameter portion (40), forming a seat (42) against the hub. There can be a number of passages at intervals through the body and adjacent to the plug.