Fahrenheit™ High Temperature
Finding the right submersible pump isn’t always easy. If you’re dealing with high temperature liquids, you may experience the frustration of a premature pump failure. Let’s review possible causes.
But first, here are the basics. A submersible pump’s electric motor generates heat that if not dissipated properly can damage the pump. In most applications, the cooler pumped liquid transfers heat away from the motor to maintain the pump within safe operating parameters.Pumping High Temperature Liquids
Pumping liquids that are hotter than room temperature with a regular submersible pump (or a “high temperature” pump that doesn’t have a high enough temperature rating) can cause a series of issues that may result in catastrophic pump failure, including the following scenario:
- The hotter water limits heat transfer cooling of the motor
- As the motor runs hotter, the seal oil breaks down
- Broken down seal oil doesn’t cool the seal components properly
- As the seals heat up, the seal elastomers break down and cause fluid to leak into the motor chamber
- Fluid in the motor chamber causes the electric motor to short and the pump to fail
High duty cycles can also cause premature failures with submersible pumps.