Blackmer Internal Gear Pumps

Blackmer internal gear pumps transfer compatible process liquids, including viscous fluids. Selection depends on viscosity, lubricity, temperature, chemical compatibility, and required pressure.

An outer rotor and an internal idler gear create spaces that carry liquid around the casing. The gears mesh near the outlet, displacing liquid into the discharge.

Yes. Blackmer lists G Series internal gear pumps and other gear-pump families. Compare the available designs and construction against the specific fluid and operating duty.

Internal gear pumps move liquid in spaces between gear teeth. Sliding vane pumps use moving vanes in a rotor, with different wear characteristics and fluid-handling capabilities.

Internal gear designs are commonly considered for viscous transfer. The selected speed, suction piping, clearances, and motor torque must allow the liquid to enter and move through the pump.

A suitable configuration can handle compatible oils and lubricants. Provide viscosity across the operating temperature range, particularly when cold startup conditions differ substantially from normal operation.

Yes. Blackmer lists E Series magnetic-drive gear pumps. Magnetic coupling eliminates a conventional rotating shaft seal, while material compatibility and operating limits still require application-specific review.

Temperature changes viscosity, clearances, seal conditions, and material limits. Selection should include startup, normal operation, and cleaning temperatures rather than a single nominal value.

Abrasive particles can damage close-clearance surfaces and bearings. Identify particle size, hardness, and concentration so the suitability of a gear pump can be evaluated before selection.

Changing speed generally changes displacement rate. Actual delivery also depends on internal slip, viscosity, and pressure, so use performance information for the selected operating conditions.

Some liquid can move backward through internal clearances as pressure rises. Slip affects delivered flow and efficiency, especially with thin liquids or worn components.

A blocked discharge can cause excessive pressure in a positive displacement system. Properly selected relief or other protective arrangements must account for all components and the process.

Dry-running limits vary by design and materials. Confirm the manufacturer's requirements because some internal components rely on the liquid for lubrication and cooling.

Inspect applicable seals, bearings, gears, clearances, and drive components. Record flow and pressure trends, and follow the specific manual for lubrication, adjustment, and replacement intervals.

A replacement must match duty, materials, seals, speed, torque, mounting, and connections. Compare the complete installation rather than selecting solely from horsepower or port size.

Contact Industrial Air Services at (615) 641-3100 with the liquid, viscosity, temperature, required duty, and existing nameplate to discuss an appropriate gear-pump configuration.