Gorman-Rupp RD4A31-BAR

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Size: 6” x 4” (152mm x 102 mm) Flanged.
Casing: (RD4A31‐BAR) Ductile Iron 65‐45‐12.
(RD4A32‐BAR) Cast Steel 70‐36.
Maximum Operating Pressure 203 psi (1386 kPa).*
Enclosed Type, Five Vane Impeller: Aluminum 356‐T6.
Handles 1/2” (12,7 mm) Diameter Spherical Solids.
Impeller Shaft: Steel 1045.
Rotor: Copper Alloy C93400.
Bearing Housing: Ductile Iron 65‐45‐12.
Body Cover: (RD4A31‐BAR) Ductile Iron 65‐45‐12.
(RD4A32‐BAR) Cast Steel 70‐36.
Center/Spacer Plate: (RD4A31‐BAR) Ductile Iron 65‐45‐12.
(RD4A32‐BAR) Cast Steel 70‐36.
Radial Bearing: Open Double Row Ball.
Thrust Bearing: Open Single Row Ball.
Bearing Lubrication: SAE 30 Non‐Detergent Oil.
Gaskets: Vegetable Fiber, PTFE and Cork.
Priming: Rotary Vane Type Priming Pump.
Air Release Valve : Cast Iron/Stainless Steel.
Optional Equipment: Stainless Steel Fitted Air Release Valve.
Stainless Steel 416 Impeller Shaft, PTFE Seal with Fluorocarbon
O‐Ring, PTFE Seal with Buna‐N O‐Ring, Standard 4” Check Valve (Required for Priming).
*Consult Factory for Applications Exceeding Maximum Pressure and/or Temperature Indicated.


Suction 6" (152 mm)
Discharge 4" (102 mm)
Solids Handling 0.5" (13 mm)
Material Ductile Iron
Impeller Material Aluminum
Seal Material Carbon/Ni-Resist
Flange ASA
Drive Type Basic