Safety valves are used on boilers with compressible gases, particularly liquid systems such as steam. Pressure excess can be generated in a number of different situations, including: sudden pressure surges, exposure to a fire, cooling system failure, instrumentation failure, heat exchanger tube failure, unbalanced fluid flow rate, and fluctuations in temperature. They are also categorized as Water Tube Boilers and Fire Tube Boilers. It is essential that fail safe mechanisms such as safety valves and safety relief valves are installed in boilers and other devices that maintain pressure in order to prevent the pressure from accumulating to dangerous levels. A safety valve should be in operation at all times. Therefore, boilers are categorized based on the following factors: type of fuel used, firing type, type of heating method such as steam, circulation method, and type of construction. In a boiler, when the maximum pressure is reached, the safety valve will kick in by releasing a certain amount of fluid such as steam from within the boiler unit. Hot water boilers are often used commercial buildings, manufacturers, and businesses.

It is then used as a source of heat for residential, commercial, and industrial hearing.The two most common types of boilers that require safety valves are steam boilers and hot water boilers. Water is heated to temperatures that will permit distribution with some boilers heating the steam even hotter than the boiling point temperature. The steam from the boiler is used for such applications as generating power or heating a building. All of these different boilers that maintain high pressure and temperature require safety valves. Other types of boilers that require a safety valve include: Natural circulation boiler, Forced Circulation Boilers, and Super Critical Pressure Boilers. These valves should be installed wherever there is a risk of too much pressure building up in a boiler. Fire tube boilers include: Domestic Use Boilers, Locomotive Boilers, ball valve true union and Industrial Boilers. Boiler categorization is based on a number of factors such as how much it is used and the type of system such as a fuel firing or fuel fired system.A safety valve or safety relief valve is designed to prevent too much pressure build up in a boiler.

A boiler is an enclosed mechanical unit that provides a way for combustion heat to be transferred into water until it becomes heated water or steam.The two main types of boilers that require a safety relief valve are Power Generation Boilers and Industrial Steam Generators. Therefore, a safety relief valve is needed in case of an emergency where the pressure becomes dangerously too high. That is, boiler types such as critical boilers, oil fired boilers, gas fired boilers coal fired boilers, fluidized bed boilers etc. These types of boilers are used in industrial power generation.

When the water or other fluid is heated in a boiler, it is under pressure. When a boiler is under pressure, measures have to be implemented to make sure too much pressure accumulates that cause an explosion. Based on the type of fuel used, boilers can be categorized as multi-fuel fired, gas fired boilers, coal fired boilers, oil fired boilers, biomass fired boilers, and industrial waste fired boilers. The main type of device used to prevent overpressure is the safety valve or safety relief valve. As well, they are used in pressure pumped systems such as pressurized water tanks. As it relates to generating steam for power, the steam is removed from the steam boiler at an extremely high temperature and pressure. The release will reduce the excess pressure thereby preventing dangerous results such as an explosion.