Directional seat valve with valve closure in axial housing bore

摘要

The valve closure has at least one valve plug (5a-c), a valve seat, and a thruster (5d-f) with a cylindrical and a conical part, the latter facing the valve plug for its compression against the seat. The plug and thruster form an integral part. The seat is an annular disc (6) with a centre aperture, through which the thruster passes. The inner annular edge (6a), of the disc, facing the valve plug is pressed into a dished shape, whose radius equal that (r5b) of the plug spherical part (5b). The inner dia. of the disc is larger than the outer dia. of the thruster cylindrical part (5f) by a specified amount.