Gorman-Rupp GMC1DE3 1″ Internal Gear Positive Displacement Pump


Internal gear pumps are high quality units capable of 15 ft. (5 m.) of lift and smooth, consistent flow. Models feature a type 21 seal for pressures up to 200 psi (13,8 Bar). With flow up to 12 gpm (0.8 lps) and a maximum viscosity of 1500 SSU, these units are available with either a 1-1/2 H.P. totally enclosed fan cooled (TEFC) or explosion_proof motor. These cast iron gear pumps are reliable, cost_effective and low maintenance.



Suction1″ (25 mm)
Discharge1″ (25 mm)
CasingCast Iron
Impeller/RotorDuctile Iron
Seal MaterialMechanical or Packing
Drive TypeElectric Motor
  • Basic Construction: Gray Iron.
  • Rotor and Idler: High Strength Iron.
  • Bushings: Carbon Graphite.
  • Idler Pin: Hardened Steel.
  • Seal: Type 21, Mechanical Self Lubricated. Carbon Rotating Face. Ceramic Stationary Face. Fluorocarbon elastomers (DuPont Viton or Equivalent).
  • Maximum Temperature of Liquid Pumped 300°F (149°C).
  • Gaskets: Synthetic Fiber w/Nitrile Binder.
  • O‐Rings: Fluorocarbon (DuPont Viton or Equivalent).
  • Pressure Relief Valve: Ductile Iron.
  • Pressure Setting: 75 PSI (5 BAR).
  • Motor Speed: 1750 RPM.
  • Rotation: Clockwise.

Additional information

Weight 59 lbs
Dimensions 24 × 12 × 10 in
Motor Type

Single Phase TEFC, 3 Phase TEFC, Single Phase Explosion Proof, 3 Phase Explosion Proof