The pressure gauge behind the nitrogen seal valve was damaged during suppression
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When we applied pressure, we failed to install a blind plate behind the nitrogen seal valve (self-acting control valve), which resulted in the pressure gauge located behind that valve being damaged. I want to know whether this self-acting control valve is still functional ? ?
It can be checked; it should work.
First, check the engineering pressure rating of the self-acting valve and compare it with the pressure applied during testing; this will allow you to assess the degree of damage to the valve. Then, the self-acting valve is set according to the required value for the pressure at the outlet behind the valve; a pressure gauge with the same range is installed, and a varying pressure is applied in front of the valve. It can be determined whether the self-acting valve can remain stable at the set pressure by observing this behavior. Furthermore, the range of pressure gauges used for nitrogen sealing is very small, ranging from a few dozen to a few hundred millimeters of water column, making them prone to damage. But the pressure regulation capability of the self-acting valve is stronger. I hope it helps a bit.