External Rotary Gear Pumps
Introduction
External Rotary Gear Pumps
Alpha Global is a leading manufacturer, supplier, and exporter of high-quality Positive
Displacement Bare Shaft External Gear Pumps. We produce these pumps in both Cast Iron (CI) and Stainless Steel (SS) variants to handle a diverse range of industrial liquids. Our pumps are engineered for precision, durability, and high-performance delivery, ensuring steady flow for both thin and highly viscous fluids in global markets.
Our Range of
External Rotary Gear Pumps
Alpha Global produces and supplies SS/CI External Gear Pumps featuring a twin rotary gear principle. The wetted parts are available in different grades of Stainless Steel or Cast Iron depending on the chemical compatibility required. These pumps use high-quality Nitrile Rubber oil seals or Mechanical Seals to prevent leakage. Designed for continuous duty, these pumps are widely used across the oil, chemical, and food processing industries for efficient liquid transfer.
Technical Specifications
| Component | Cast Iron (C.I.) | Stainless Steel (S.S.) |
| Pump Body | C.I. Gr. FG 200 | CF-8M/SS316/SS316L |
| Back Cover | C.I. Gr. FG 200 | CF-8M/SS316/SS316L |
| Gland Cover | C.I. Gr. FG 200 | SS316/SS316L |
| Rotor Assembly | Gear-SAE 8620, Shaft-EN – 8 | SS316/SS316L |
| Bush | Sintered Bonze | SS316/SS316L |
| Oil Seal | Nitrile Rubber | Viton |
| Rotor Shaft Key | MS | SS316 |
| Packing | Prespane Paper | Teflon |
Why Choose
Alpha Global's External Rotary Gear Pumps ?
Discharge
The discharge capacity ranges from 10 LPM to 500 LPM, with pipe sizes from 1/4" BSP to 3" BSP.
Pressure
They can handle pressure up to 10 kg/cm², with higher capacities available.
Materials
The pumps are available in C.I. and S.S. constructions. The C.I. version has a pump body, back cover, and gland cover made of C.I. Gr. FG 200, while the S.S. version uses CF-8M/SS316/SS316L for these parts.
Applications of
External Rotary Gear Pumps
External Rotary Gear Pumps are robust, positive displacement pumps that operate by trapping fluid between the teeth of two rotating, intermeshing external gears and forcing it out the discharge side. Characterized by high-pressure capability and non-pulsating, smooth flow, they are highly effective for pumping both thin and thick fluids with consistency and reliability. Specialized jacketed models are also available to handle fluids that require temperature regulation.
- Bitumen Pumping (using Jacketed Twin Rotary Gear Pump)
- Transferring High-Viscosity Fluids (e.g., Heavy Oils, Resins, Polymers)
- Lubrication Systems (for high-pressure machinery)
- Hydraulic Systems
- Transferring Oils, Diesel, and Fuel Oils
- Pumping Paints, Varnishes, and Coatings
- Transferring high-viscosity Chemicals