- Compact close-coupled design connects directly to equipment.
- Suitable for intermittent or medium-duty applications.
- No couplings or outboard bearings needed at synchronous speeds.
- Available in six sizes, supporting a wide range of flow requirements.
- See GHC Series for continuous-duty or viscous fluid applications.
| Brand | Gorman-Rupp |
| Size | 1″ (25 mm), 1-1/2″ (40 mm), 2″ (50 mm) |
| Max Capacity | 38 GPM (2 lps) |
| Max Viscosity | 250000 SSU (53925 cST) |
| Max Pressure | 200 PSI (14 BAR) |
| Min Temperature | -60 F (-51 C) |
| Max Temperature | 300 F (149 C) |
| Materials of Construction | Cast Iron |
Models
| Item | Size | Casing | Impeller / Rotor | Drive | Flange | Seal |
| GMC1DC3-B | 1 x 1 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1DE3 /40C | 1 x 1 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1DE3-B | 1 x 1 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1DE3-E1.5 1P | 1 x 1 | Cast Iron | Ductile Iron | Electric Motor | NPT | Mechanical or Packing |
| GMC1DE3-E1.5 3P | 1 x 1 | Cast Iron | Ductile Iron | Electric Motor | NPT | Mechanical or Packing |
| GMC1DE3-X1.5 1P | 1 x 1 | Cast Iron | Ductile Iron | Electric Motor | NPT | Mechanical or Packing |
| GMC1DE3-X1.5 3P | 1 x 1 | Cast Iron | Ductile Iron | Electric Motor | NPT | Mechanical or Packing |
| GMC1 1/2GC3-B | 1.5 x 1.5 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1 1/2GF-B | 1.5 x 1.5 | Cast Iron | Ductile Iron | Basic | ASA | Buna-N |
| GMC1 1/2GF3-B | 1.5 x 1.5 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1 1/2GH3-B | 1.5 x 1.5 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC1 1/2GJ3-B | 1.5 x 1.5 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC2GC3-B | 2 x 2 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC2GF3-B | 2 x 2 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC2GH3-B | 2 x 2 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
| GMC2GJ3-B | 2 x 2 | Cast Iron | Ductile Iron | Basic | NPT | Mechanical or Packing |
The Gorman-Rupp GMC Series Rotary Gear Pumps are engineered for intermittent to medium-duty service, making them a perfect choice for OEMs and industrial setups requiring reliable gear pump performance within a compact footprint.
Key features include:
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Space-saving close-coupled design: Eliminates the need for separate coupling or outboard bearings when operating at synchronous speeds, simplifying installation and minimizing system size.
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Direct motor coupling: The six available GMC pump sizes are designed to mount directly to standard NEMA “C” flange motors, streamlining equipment integration.
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Versatile shaft bore options: The rotor shaft accepts standard motor shafts (5/8″ as default), with optional sizes (7/8″, 1 1/8″, and 1 3/8″) to suit various industrial setups. Metric couplings are also supported for global compatibility.
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Reliable performance for moderate loads: Suited for a range of liquid transfer needs in intermittent or medium-duty operations, such as lubrication systems, light chemical transfer, and OEM applications.
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Alternative for heavier demands: For continuous-duty operations or highly viscous liquids, the Gorman-Rupp GHC Series is recommended.
This series is an excellent choice for manufacturers and engineers seeking a durable rotary gear pump with easy integration, minimal space requirements, and proven mechanical simplicity.
