When testing a safety valve manually on a low-pressure boiler, how long do you hold it open?

Holding a safety valve open for 5-10 seconds during manual testing is essential to ensure that the valve operates correctly under controlled conditions. This duration allows sufficient time for the valve to fully open and release pressure, confirming that it can perform its primary function of relieving excessive pressure within the boiler system. It also provides enough time to observe whether the valve reseats properly once released, ensuring that no leaks occur, which indicates the valve is functioning safely and effectively.

This specific time frame balances the need for thorough testing without exceeding typical operational protocols, which could potentially create undue stress on the valve or the system. Testing for too short a period may not reveal failures in operation adequately, while testing for a longer period might introduce unnecessary risks or complications. Focusing on the recommended duration contributes to overall boiler safety and compliance with industry standards.