FAQ

Question: What is a cooling jacket and when should it be used for submersibles?

Answer:

A cooling jacket, also referred to as a flow generator or flow sleeve ensures that there is always sufficient water flow across the motor surface in order to cool the motor.

In a typical well installation, the pump is surrounded by the walls of the well. The motor is installed below the pump. Because the pump draws in water from below, the water flows along the well walls and over the surface of the motor, cooling the motor in so doing.

If the pump is installed in open water, there will be no well walls to guide the water flow over the surface of the motor, thus necessitating a cooling jacket. Please enquire with your Grundfos dealer for more information about cooling jackets.

Additional information:

Enhance your knowledge

Find out how to get reduced energy consumption, increased comfort and unsurpassed operational reliability for your application. Read our customers' stories about how they benefit from the Grundfos approach to intelligence, water and energy, or search Grundfos research & insights for more learning materials, articles, white papers, videos and much more that benefit your solution.