Double acting electromagnetic valve

Double acting pilot valve

Double acting solenoid and poppet valve servomechanism

Double actuator control valve that has a neutral position

Double angled-disc diverter valve or the like

Double diaphragm pump having a spool valve

Double diaphragm pump including spool valve air motor

Double solenoid latching ball valve with a hollow ball

Double solenoid type electromagnetic valve

Double valve

Double valve mechanism for an acoustic modulator

Double valve mechanism for controlling fluid flows

Double wall plug control valve

Double-seat electromagnetic valve

Double-solenoid single-stem four-way valve

Double-solenoid type electromagnetic valve

Drag ball valve

Drag ball valve including variable pressure reducing means

Drilling choke valve

Drive for an oscillatory mechanical system