Pumps and Motors

Overview

Selecting a pump/motor combination should be based on fluid viscosity, power source, and reservoir size. Due to the damage caused by cross contamination we recommend that you use a different filter cart for each type of oil. Using a filter cart for similar oils (hydraulic, gear, etc.) is second best and should include a filter change-out for each type used.

Fluid Viscosity:

For viscosity < ISO 68 (325 SUS) use any of the motor/pump options. Many hydraulic oils will fall within this viscosity.
For viscosity = or > ISO 68 (325 SUS) use: 2 GPM air or electric options. These include most gear oils.
* SUS @ 100°F
Note: Viscosities increase dramatically at lower temperatures.

Power Source:

If electric power is readily available the following should be considered:
Our standard motors are 115/230 VAC, single phase, 60 Hz. Please see the section “Electric Motors” below for specifics and other options.

Air motors were selected to drive our hydraulic pumps because they do not create pulsing as seen on diaphragm pumps. Our air motor/pump combinations deliver a constant flow and thus better filtration. Please see the section “Air Motors” below for specifics.

Reservoir size:

The amount of time it takes to filter or transfer an oil should be considered when selecting a pump. When filtering the fluid inside a reservoir allow enough time for the fluid to circulate seven times.

Example 1: A 100 GAL reservoir will take 140 minutes to adequately filter at 5 GPM (100 GAL X 7, divided by 5 GPM).
Example 2: 1000 GAL reservoir would take 50 minutes to transfer with a 20 GPM pump.

Electric Motors

* Click here to download a table provided for guidance in selecting FlowGuard™ products. Des-Case Corporation makes no guarantee that the information is accurate. Please use it at your own discretion.

Air Motors

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