초록 ▼

A flapper control valve having a valve housing and at least one valve port plate sealably secured to the valve housing. Each valve port plate has at least one valve port plate through hole. At least one back plate is mounted downstream from the valve port plate and in an open position at a distance

A flapper control valve having a valve housing and at least one valve port plate sealably secured to the valve housing. Each valve port plate has at least one valve port plate through hole. At least one back plate is mounted downstream from the valve port plate and in an open position at a distance from the valve port plate. Each back plate has at least one back plate through hole. In the open position, at least one valve port plate through hole is in communication with at least one back plate through hole. The distance between the back plate and the valve port plate in the open position can be closed thus sealing the communication between at least one valve port plate through hole and at least one back plate through hole.

대표청구항 ▼

A one-directional flapper control valve comprising: a valve housing having at least one inlet fitting and at least one flat side, at least one valve port plate sealably secured to said at least one flat side of said valve housing, each said valve port plate having at least one valve port plate throu

A one-directional flapper control valve comprising: a valve housing having at least one inlet fitting and at least one flat side, at least one valve port plate sealably secured to said at least one flat side of said valve housing, each said valve port plate having at least one valve port plate through hole; at least one back plate, each said back plate having at least one back plate through hole, said back plate mounted in an open position relative to and at a distance from said valve port plate, in said open position said at least one valve port plate through hole in communication with said at least one back plate through hole; and closing means for closing a gap between said back plate and said valve port plate thereby sealing the communication between said at least one valve port plate through hole and said at least one back plate through hole, said closing means further comprising a plurality of ring flappers mounted between each said valve port plate and a corresponding said back plate, in a closed position of said back plate with respect to said valve port plate each said ring flapper seating against and between said valve port plate and said back plate closing communication between each said back plate through hole and each said valve port plate through hole, solenoid means and control means for switching the flapper control valve between said open position and said closed position.