Maximum Surge Pressure

One of the most destructive application conditions for a pressure switch is hydraulic surge. A surge is a high rate of rise in pressure, normally of short duration, caused by starting a pump or by opening and closing a valve. Extremely high rates of rise in pressure can be damaging even if they are within the limits of maximum allowable pressure.

Maximum surge pressure is the safe pressure for the switch housing but which may damage the mechanism by continuous or repetitive application.