What's The Difference Between Safety Valve And A Relief Valve?

1. Simply say that the safety valve is to avoid the system pressure beyond a certain value, is mainly used to maintain the system, pressure relief valve is to reduce the system pressure from high pressure to a required appropriate value, its outlet pressure is a scale, only within this scale can be.

2. Safety valve: the safety valve is a special valve whose opening and closing parts are normally closed under the effect of external forces. When the medium pressure in the equipment or pipeline increases beyond the regular value, it will discharge the medium outside the system to avoid the medium pressure in the pipeline or equipment exceeding the regular value.Safety valve belongs to the automatic valve class, mainly used in boilers, pressure vessels and pipelines, control pressure does not exceed the rule value, for personal safety and equipment operation plays an important maintenance effect.It is necessary to use the injection safety valve after pressure test.

3. Pressure relief valve: the pressure relief valve is adjusted to reduce the inlet pressure to a certain demand of the outlet pressure, and rely on the energy of the medium itself, so that the outlet pressure automatically adhere to the stability of the valve.From the concept of fluid mechanics, pressure relief valve is a part of the resistance can be changed to save the element, that is, through changes to save area, so that the flow rate and fluid kinetic energy changes, the formation of different pressure loss, and then to the intention of decompression.Then, depending on the control and conditioning system, make the pressure behind the valve shake and spring force balance, make the pressure behind the valve in a certain error scale adhere to the stability.