Page 11 - Coolant - Houghton Training

The Mechanics of Metalworking Fluids

Keep the Fluids Moving

Circulation of the sump is as important as any other mechanical method since it keeps

things moving, forcing oxygen into the system. Oils have a harder time pooling on the
surface, which helps to prevent bacterial biofilms. If you have any doubt about this

strategy, think about how an aquarium works, and why ponds can go stagnant.

It may not be feasible to leave the coolant pump on at all times, so instead, a small

centrifugal pump can be introduced to the sump to keep the coolant from remaining

in a static state. If the machine sump is divided, all baffles should be agitated. Small
aerators can also perform this function if the sump holds 50 gallons or less.

Keep in mind any coolant that pools in the lines is affected by the same forces in play.

When machine sumps are emptied, cleaned, and recharged, these lines are usually
overlooked, and bacterial contamination still exists within the system