What’s a thermal relief valve and knowing its uses When you see in lots of industries and factories you will find a Thermal Relief Valve being put to use. Well, as far as concerned the thermal relief valve is a valve or a regulating outlet that lets hot air or any other type of gas come out of the pipes and chambers. It is a device that is often controlled mechanically through a set of switches. This device is connected to tubes and connecting sections of tubes within which some type of gas is flowing at high pressure or heat. You can think of a Back Pressure Regulating Valve as a safety device more so because it prevents the gas flowing inside the pipes from overheating which can result in a catastrophe in the industry or factory premises. With the inclusion of these valves, you can say that the temperature and the pressure of the gas flowing inside are controlled to some extent. The basic use of a relief valve It is mostly used as a safety device onboard the pipe systems. It prevents overheating of the gas beyond a preset level. Even in case of any emergency if the gas pressure exceeds the preset pressure on the relief valve this will automatically open up the mouth of the relief valve causing it to open up and relieve the extra pressure.