SurgeGuard surge alleviators prevent water hammer produced by fast valve closure.

When the valve is closed too quickly, normally all the liquid would have to suddenly stop.

SurgeGuard surge alleviators provides a space into which the liquid can flow.

As it flow into the space, it compresses a gas-filled bladder, so as the space fills, the bladder provides an increasing resistance.

In this way, the liquid can be decelerated more slowly, preventing the formation of a shockwave.

The same process happens when the pump is started up too quickly.