Speed controller with pilot check valve

摘要

A speed controller has a pilot check valve (14) having a first body (12) which has a first fluid inlet/outlet port (64) defined in an end thereof and a pilot port (30) defined in an opposite end thereof. A flow control valve (20) has a second body (18) integral with the first body (12). A pipe joint (24) has a third body (22) which has a second fluid inlet/outlet port (94) defined in an end thereof and, the third body (22) being integral with the second body (18). A flow adjustment screw (74) is disposed in the flow control valve (20) and extends into a fluid passage (82) which interconnects the first fluid inlet/outlet port (64) and the second fluid inlet/outlet port (94), for adjusting a rate of flow of a fluid under pressure in the fluid passage (82). A valve body (58) is disposed in the pilot check valve (14) for opening a fluid passage (40) which interconnects the first fluid inlet/outlet port (64) and the second fluid inlet/outlet port (94) in response to a pilot fluid pressure supplied from the pilot port (30).