Where is the safety valve/pop-off valve typically located?

The safety valve, also known as the pop-off valve, is typically located on or near the top of the steam boiler. This positioning is crucial for its function, as it is designed to release excess pressure that can build up within the boiler system. By being located at or near the top, the safety valve can effectively vent steam and prevent potential over-pressurization, which could lead to hazardous conditions or a boiler explosion. This strategic placement allows for immediate response to high-pressure scenarios, maintaining safe operational conditions in the heating system.

In other locations, such as the base of the steam boiler or inside the boiler itself, the safety valve would be less effective in performing its function. A valve at the base may not adequately respond to increasing pressure, and one located inside the boiler could be compromised by the very conditions it is meant to monitor. Similarly, placing the valve in the oil supply line is not appropriate, as it needs to monitor and release steam pressure specifically related to the boiler’s operation.