What must be installed on the low-pressure side of a Pressure Relief Valve (PRV)?

A pressure relief valve (PRV) is a critical safety device designed to prevent overpressure in piping systems. Installing a pressure gauge on the low-pressure side of a PRV is essential for several reasons.

First, the pressure gauge provides real-time monitoring of the pressure downstream of the PRV. This allows operators to ensure that the system is operating within safe pressure limits and can immediately identify any changes in pressure that may indicate malfunction or the need for maintenance.

Second, detecting the pressure on the low side aids in assessing the performance of the PRV itself. If the pressure consistently approaches the PRV setting, it can signal that the valve is either functioning correctly or may require adjustments or service if it remains too close to the relief setting.

Moreover, having a pressure gauge helps ensure compliance with safety regulations, as it allows for efficient inspection and testing of the pressure relief system as per applicable codes and standards relevant to high-pressure piping systems in Minnesota.

In summary, installing a pressure gauge on the low-pressure side of a pressure relief valve is vital for monitoring, safety, and maintenance purposes.