Feb 01, 2020 - 04:08 AM
The good news is that you can use just about any centrifugal pump that has FMK / Viton O-Rings, this means that you do not have to use specialty chemical pumps. Our Coolants are very pump friendly in terms of lubrication and materials and most centrifugal water pumps will work fine as long as they have the correct gasket and O-ring materials.
Because SLIC open tank systems do not generally need high pressure, but rather high volume, you'll want to use the largest impeller possible and have that impeller turn as slow as possible (1800 RPM is a common rotational speed we like to use), this creates less cavitation and provides greater overall flow.
We've had great success with Grundfos CR and CRE pumps.vertical multi-stage centrifugal pumps.
Other pumps we use are Bell and Gossett pumps, and March pumps.
In almost all cases we use a VFD - variable frequency drive, which enables a 3phase pump to change rotational speed based on user input or temperature feedback. We like this feature as it allows us to dial in the pump speed and thus coolant flow based on the the temperature of the devices and the coolant return temperature.