Well blowout preventer control pressure modulator
Wellbore valve having linear magnetically geared valve actuator
Whisker actuated faucet controller
Winch control valve
Wiper for a rotary disk valve
Wiper ring for a fluid system flow interrupting device
Wire cutting insert for gate valve
Wireline safety valve with split ball
Wireline safety valve with split ball
Z valve
Zero internal pressure cartridge
Zero lap valve