Dry-running protection for water pumps is one of the most important monitoring functions, as the bearings and shaft seal may be damaged if the booster pumps run dry. It is thus always recommended to install dry-running protection on your booster pump if it does not feature built-in protections.
There are three different methods for the detection of water shortage: Pressure switch on the suction manifold or float switch/electrode relay in the supply tank: Dry-running protection with pressure/level switch. Measuring the inlet pressure in the suction manifold using an analogue pressure transmitter: Dry-running protection with pressure transmitter. Measuring the water level in the supply tank using an analogue level transmitter: Dry-running protection with level transmitter.
The SCALA2 and many other Grundfos pumps come equipped with dry-running protection as standard.
