FOR TOUGH TASKS

There are many reasons why some liquids need to be pumped at higher temperatures. However, this can cause problems for pumps designed to operate at ambient temperatures and which are reliant on close tolerances for operational efficiency. Differential thermal expansion can also cause fit problems with bearings, bushes and dynamic seals.

Hydra-Cell pumps from Wanner are able to handle liquids to 120°C with ease. There are no dynamic seals and no bearings or bushes, operating within the pumped liquid, to be affected by thermal expansion or corrosion. Pumped liquid is isolated from the fully lubricated drive end of the pump and selection of appropriate pump head material ensures that corrosion is not a problem.

Where even higher operating temperatures are encountered, Wanner says it can supply compatible oil coolers to maintain the pump's hydraulic liquid at optimum viscosity.