Failed mechanical seal due to dry running in an E-Tech pump.

Dry running is the operation of a pump without liquid flow. This situation is extremely undesirable for the working elements of the pump, in particular the mechanical seal. When working in the "dry run" mode, even for 20 seconds. friction pairs "sinter", the sealing elements are deformed. To prevent the pump from running dry, automation is used: dry running sensors, dry running relays, float sensors, etc.