Pump control-surge reliever system.

摘要

A surge control system for a liquid-transporting pipeline including a pump. A two-way surge reliever valve, preferably of the expansible tube type, is located in a by-pass line around the pump and the jacket or control pressure is maintained at the level of an accumulator connected to the pipeline downstream of the pump. The inlet line to the accumulator has a restriction so that when the pump starts, pressure build-up in the accumulator and control jacket is retarded, allowing by-pass flow from the downstream side of the pump back to the upstream side. The discharge from the accumulator is full capacity with a one-way check valve so that when the pump is stopped, liquid is drawn from the accumulator first to alleviate column separation in the downstream pipeline and then to draw down the jacket pressure to allow by-pass flow around the pump to further alleviate column separation.