Anti-whistling duckbill valve
Automatic back water valve system
Automatic pulsing valve
Breather valve
Bypass relief poppet valve
Control arrangement for actuating a shut-off valve and method of
Controlled high pressure relief for small volumes
Damper with blade for sensing pressure differential
Engine valve seating velocity hydraulic snubber
Exhaust reduction system for control valves
Flow compensated pressure control system
Flow control apparatus
Flow control weir valve
Flow loading unloader valve
Flow metering valve
Fluid flow control system
Fluid pressure relief system for pressure vessels
Fluid pressure relief system for pressure vessels
Fluid supply pressure control method and apparatus
Fuel equalizing system for plurality of fuel tanks