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Negative pressure control valve 2011-12-19
A negative pressure control valve for generating a negative pressure has an inlet port communicating with a negative pressure source, an outlet port communicating with a negative pressure load, a diap
ELECTRIC PRESSURE-REDUCING VALVE 2011-12-16
A pressure reducing valve comprises a valve support member provided with a water passage, a valve seat fitting on the portion of the valve support member primary side relative to the secondary side en
Pressure-actuated circulation valve 2011-12-15
A circulation valve is disclosed for use in a tubing-conveyed tool string. The valve is adapted to be open as the tool string is run into the well, enabling circulation flow from the tubing into the w
Fail safe hydraulic piloted pressure reducing and regulating valve 2011-12-14
A hydraulic piloted pressure reducing and regulating valve which is fail safe for holding the valve at the last selected operating pressure in the event of the loss of control signals.
Direct acting pressure reducing valve 2011-12-13
A direct acting pressure reducing valve includes a valve-inlet pressure introduction port; a valve-outlet pressure output port; a main valve for opening and closing a communicating conduit.
Safety pressure reducing regulator 2011-12-12
A safety pressure reducing regulator for use in systems operable by pressurized gas incorporates multiple safety features which preclude excessive pressure buildup in the system and provide protection
Solenoid operated pressure balanced valve 2011-12-09
A pressure balanced gas control valve which uses a bellows to hermetically seal the solenoid from the valve. The gas valve has a valve housing which has an inlet port, an outlet port and a valve seat.
Master cylinder-reducing valve assembly 2011-12-08
A master cylinder-reducing valve assembly has a master cylinder and a reducing valve for transmitting output hydraulic pressure from the master cylinder to a rear wheel brake at a reduced level.
