Where should the circulation relief valve on a fire pump be installed?

The circulation relief valve on a fire pump should be installed on the suction side to effectively manage the system's pressure and ensure proper operation. When the pump is running, the suction side experiences negative pressure during normal operation, and the circulation relief valve helps to prevent cavitation by allowing excess fluid to recirculate back to the supply, thereby maintaining a consistent pressure that keeps the pump operating efficiently.

Installing the circulation relief valve on the suction side protects the pump from issues like overheating and damage due to insufficient fluid entering the impeller. This placement is critical for maintaining the hydraulic balance and prolonging the lifespan of the pump. Proper installation on the suction side allows the valve to automatically relieve excess pressure by redirecting flow when necessary, which is essential in preventing problems that could arise from pressure spikes or fluctuations in the system.