In the most basic terms, the difference is that pressure control valves are the first line of defence and is therefore used for primary safety, 

The first difference between the two lies in their purpose. The purpose of a relief valve is to keep the pressure in a system within set limits to prevent overpressure. Relief valves are

A thermal relief valve is designed to allow a small flow of liquid to. escape from a pipeline. Typically, one will be used on every section of. line beween valves that is exposed to heat - maybe solar if the line is. above ground. A pressure safety valve is designed to pass large quantities of liquid to. avoid overpressurising.

Thermal safety valves work in an automatic manner and when the temperature falls below the set point it automatically reset. Thermal relief valves are usually placed in a remote location without easy access. Also, normally temperature sensors, processors, or solenoid-type sensors are not used to control TRV systems.

Pressure relief valves are a type of safety valve that are commonly used to protect a system and the people operating it.

Safety relief valve - A pressure relief valve characterised by rapid opening or pop action, or by opening in proportion to the increase in pressure over the 

8/19 · Difference between Safety valves & Relief valve: The names “safety” and “relief” are often used interchangeably but are not supposed to be. For compressible fluids, safety valves are: steam and other gases. Compressible fluids need quick pressure relief.

A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance 

When the capacity of the safety valve is equal to the flow rate to be discharged, the pressure inside the protected equipment remains constant. Otherwise, if 

The main difference between Relief Valve and Safety Valve is that Relief Valve helps in maintaining the right amount of pressure in a system so that it does 

As a result, many problems have arisen. (1) Safety Valve is an automatic pressure relief device driven by the static pressure of the medium in front of the valve. It is characterized by a protruding full opening action. For use with gas or steam. (2) Relief Valve, also known as overflow valve, is an automatic pressure relief device driven by