More from PRC Industrial Supply

PRC Industrial Supply offers a full range of services including:

  • In-house repairs of pumps, motors, valves and cylinders
  • Hose burst testing to 30,000 PSI
  • Custom power unit design and fabrication
  • Field-trouble shooting and hydraulic system design including incorporation of wireless radio remote controls into existing system

We also provide custom fabrication of hydraulic steel tubing, hydraulic hose and industrial hose assemblies using a wide variety of hose types and fittings configurations.

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RD-1900 Side Port

RD-1900 Side Port
Model Number Ports PSI GPM Size Weight
RD-1937-8 3/8 NPTF 3000 0-8 4.6"x4.9"x 3.7" 9
RD-1950-8 1/2 NPTF 3000 0-8 4.6"x4.9"x 3.7" 9
RD-1950-16 1/2 NPTF 3000 0-16 4.6"x4.9"x 3.7" 9
RD-1975-16 3/4 NPTF 3000 0-16 4.6"x4.9"x 3.7" 9
RD-1975-30 3/4 NPTF 3000 0-30 4.6"x4.9"x 3.7" 9
RD-1908-8 #8 SAE 3000 0-8 4.6"x4.9"x 3.7" 9
RD-1912-30 #12 SAE 3000 0-30 4.6"x4.9"x 3.7" 9
RDRS-1950-16 1/2 NPTF 3000 0-16 4.6"x4.9"x 3.7" 9
RDRS-1975-30 3/4 NPTF 3000 0-30 4.6"x4.9"x 3.7" 9


The PRINCE valve models RD-100 and RD-1900 are pressure compensated adjustable flow control valves. By rotating the handle, the flow out the "CF", or controlled flow port, can be varied from approximately 0 to the maximum controlled flow shown in the chart below. Any remaining flow is bypassed to the "EF"or excess flow port. This flow can be used to power another circuit or can be returned to tank. Once the controlled flow is set it will remain nearly constant with variations in pressure on either the controlled or excess flow ports. Please note: If during operation the controlled flow port is 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 PRINCE valve models RDRS-100 and RDRS-1900 have a built in adjustable pressure relief. For these models the excess flow port must be connected to tank.

It should be noted that whenever these 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.

Valve Specifications: Field Repair Kits

  • Capacity: 30 gpm max inlet flow
  • Pressure: 3000 psi max
  • Weight: RD-100 8 lbs.
  • RD-1900 9 lbs.

Field Repair Kits

  • Handle hardware 660301002
  • Seal Kit 660501001

See PDF for complete specifications

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