What is Difference between relief valve and safety valve?

Relief valve always position in the suction line in oreder to relief the extra pressure, while safety valve is always placed at discharge line to release excess pressure.

I would take that one step further by stating that a " RELIEF VALVE" is one that is "meant" to be lifted off its seat, as opposed to a "SAFETY RELIEF VALVE" which is not!

DIFFERENCE BETWEEN RELIEF VALVE AND SAFETY VALVE:

1. Releif valve is applicable in the fluid system.

safety valve is applicable in the gaseous system.

2.Relief valve opening is directly proportional to the pressure rise.

Safety valve opening is will happen at after reaching the set

pressure.

3.Mode of relif vlave line is again connected to the suction.

But in the safety valve is just vent-out there is no connection to

suction.