Economically designed for effective control of hydraulic and pneumatic actuators where frequent adjustment is not required.

B at the end of the order number denotes that it is brass.

Provides metered flow in one direction and free-flow in the reverse

Designed for extremely precise control of hydraulic and pneumatic actuators.

S at the end of the order number denotes that it is made from steel.

The RD-100 & RD-1900 Valves are pressure compensated adjustable flow control valves. By rotating the handle the flow out the "CF" or controlled flow part can be varied within the range given in the chart below. Any remaining flow is by-passed to the "EF" or excess flow port. This flow can be used to power another circuit or can be returned to the tank. Once the controlled flow is set it will remain nearly constant with variations in blocked, the valve will compensate in such a way as to shut off flow to the excess port. These valves can also be used as a restrictive flow control by plugging the excess flow port. The RDRS-100 & RDRS-1900 have a built-in adjustable pressure relief. For these models the excess flow must be connected to the tank.

The Wolverine/Prince valve Model WR-1900 has a built in adjustable pressure relief.  For this model, the excess flow port must be connected to the tank.  It should be noted that whenever this or any valve is used to bypass or restrict flow, heat will be generated.  Steps may be required to keep oil temperature from becoming too high.