Surge Control System Operation
The principal components of the system are the hydropneumatic tank, an ASME pressure vessel, and the automatic level control system (control panel, valves, level transmitter, air compressor, and sight glass). The standard hydropneumatic tank contains no moving parts to wear out.
The surge control system controls the energy and thus minimizes transient pressure from the shock waves. Since the pressure condition in the pipeline is sensed automatically, the surge arrestor reacts immediately to a pressure decrease by discharging water to the pipeline before column separation occurs. Complete protection of the fluid system may require two surge control systems; one on the discharge side of the pump to protect the pipeline from sudden valve closure and pump start-up/shutdown, and one on the suction side of the pump to prevent cavitation on pump start-up/shutdown and eliminate surges caused by pump shutdown.