Title: Push-type control valve for fluid actuator

• Summary
• Claims
• Description
• View all

Abstract: A pilot line-operated control valve (32) for an actuator (14) that operates a gate valve (12) in the main flowline (10). A slide valve (70) having a piston (76) on its inner end is mounted in a longitudinal bore (46) of the elongate valve body (40) for movement between an open position in which fluid is directed to actuator (14), and a closed position in which fluid is prevented from flowing to actuator (14). A fluid isolated pilot blocking portion (98) of slide valve (70) is oriented such that once slide valve (70) moves to the closed position, pilot blocking portion (98) abuts pilot port (56) so as to block pilot line fluid pressure from acting on slide valve (70) under any operating conditions, including even a resumption of fluid pressure in the pilot line (30), when slide valve (70) is in the closed position. The so-called push-type control valve (32) is reset by manually pushing slide valve (70) inwardly.


Do you think this is a good invention? Vote now: