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Gear Pumps

High-Quality External And Internal Gear Pumps.

External Gear Pumps

External gear pumps are typically used as lubrication pumps in machine tools, oil pumps in engines and in fluid power transfer units. They can have one or two gears in the pump that drives the liquid. They are also used in the chemical industry for metering. As with all gear pumps, external gear pumps provide a relatively smooth flow of liquid.

External gear pumps run with close tolerances, allowing them to pump to pressures beyond 3,000 PSI, making them well suited for hydraulic systems. Their tight internal clearances also provide a more reliable measure of liquid passing through a pump and greater flow control, making them a pump of choice for precise transfer and metering applications requiring the flow of fuels, chemical additives and polymers. They are available in single and double sealed versions or magnetically driven sealless versions.

Internal Gear Pumps

Internal gear pumps are very versatile and have a high viscosity and temperature range. They can be used for a variety of materials ranging from thin liquids like chemicals or even thicker liquids like mud, asphalt, sewage and even chocolate.

Some of the advantages of internal gear pumps is their simplicity, they have only two moving parts and only one stuffing box. They are easy to maintain, create an even and consistent discharge rate and they can operate in either direction. These pumps are available in a wide range of metallurgies from iron to stainless steel or hastelloy. There are also composite options available. They are available in sealed versions or magnetically driven sealless versions.

Gear Pumps Brands

BSM Pump
Envirogear
Haight Pump
Liquiflo
Tuthill
Viking Pumps
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