I've been running into situations where a relief valve is
being used to protect a regulator. Is this common? And,
is this a proper use of a relief valve?



I've been running into situations where a relief valve is being used to protect a regulator. ..

Answer / Pushkar Gupta

Using a relief valve to protect a regulator is not a typical application, but it can be done if the regulator has no built-in overpressure protection. However, a pressure reducing valve would be more suitable for maintaining a constant outlet pressure.

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