Pump Guardian, Standard on all Refrigerant Liquid Pumps

The Pump Guardian is now standard and required on all Hermetic refrigerant liquid pumps. Hansen’s Pump Guardian is an easy to understand controller designed to protect pumps from improper or harmful operating conditions. The Pump Guardian helps to ensure effective pump protection and offers a degree of protecton greater than other commonly-used protective electrical and computer controlled circuits.

When the Pump Guardian shuts down the pump due to cavitation, this device automatically resets the pump up to 6 times in an hour, avoiding nuisance shut-downs. If the pump cavitates more than 6 times in an hour, the pump shuts down in order to prevent unnecessary pump damage due to excess on/off cycling, and must be manually reset. A pump cavitating at this rate indicates a system problem, and a thorough examination of the system is required.

Electrical circuits and computer-controlled devices can ignore the condition of pump equipment for the sake of keeping the system running, making plant operators unaware of a potentially more serious condition affecting the pump.

The Pump Guardian provides a centralized point for monitoring and protection of pumps.This controller displays pump status such as running, cavitating, off due to low liquid level, loss of pump pressure, and pump motor overtemperature. It is suitable with Hansen Hermetic pumps as well as pumps from other manufacturers, whether of open or sealless design.

Another feature of the Pump Guardian is that the operating functions of the pump are stored in an RS232 accessible memory. Running hours, number of cavitations, low liquid level, or motor overtemperature are displayed through standard communications software.

It is a good idea to consider adding the Pump Guardian to existing systems or when replacing or repairing a pump. The Pump Guardian is added insurance for pumps operating under less than optimum conditions.