FAQ: What is hydraulic shock?

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Hydraulic shock occurs when a fluid in motion is forced to stop or change direction suddenly, often due to a valve closing or opening quickly, causing a pressure surge or wave. Hydraulic shock can generate a transient pressure spike many times higher than the normal pressure, enough to overpressure and damage a gauge.

If your application experiences hydraulic shock:

install a pressure gauge snubber on the gauge, or
install a mini needle valve to isolate the gauge from the pressurized system except when needed (i.e. when checking fuel pressure).

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