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What is Difference between relief valve and safety valve?
Ranveersingh
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.
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∙ 13y ago
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Part I-Sizing and Selection Downstream Segment API STANDARD 520 EIGHTH EDITION, DECEMBER 2008 huddling chamber: An annular chamber located downstream of the seat of a pressure relief valve for the purpose of assisting the valve to achieve lift.
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the safety valve is mounted on the top of drum because, if the water level in boiler decreases a certain value, the temperature gets increased in water drum because of lack of water. So, increase in temperature result in high pressure in steam drum, as the safety valve is designed to withstand a certain pressure, after a cetain pressure, the safety valve is removed by high pressure of steam. this is why the safety valve is mounted on top of boiler drum. +++ Shall we sort out that lot? That answer is wrong. Its only link with water-level is that the valve has to be above the water anyway. If the boiler runs dry the safety-valve will not protect it. The safety-valve is there to prevent the steam pressure rising to a potentially a dangerous level. It is set to open at the boiler's designed working pressure.
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Can use rupture disk at the place of pressure safety valve at WikiAnswers?
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