DHQ modular units composed of one by-pass solenoid valve and one 2-way compensated pressure flow control valve, type QV-06. The flow control valve is provided with a built-in check valve to allow the free flow in the opposite direction.

The flow is adjustable by turning the graduated micrometer knob. Clockwise rotation decreases the throttle, thus reducing the passage.

Optional versions with locking key on the adjustment knob, are available on request.