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a brief overview of pressure relief valves

by:Sino Valves     2021-02-21
The pressure relief valve is the key equipment used in storage tanks or other applications and can prevent damage caused by excessive pressure accumulation.
Pressure relief valves are used to limit or in some cases control the amount of pressure that may accumulate in the system (
Water tanks, pumps, etc. )over time.
When this pressure is out of control, it can lead to process interruption, equipment failure, and even fire.
These devices usually work by allowing pressurized liquids or gases to flow out of the tank or pump through additional channels.
Once a certain amount of pressure has accumulated, these safety valves can be set to open.
This protects the system.
When the pressure reaches too high, the pressure relief valve in these systems becomes the path with the least resistance.
This causes it to be forced to open so that enough liquid or gas can be removed in order to restore the system to a more acceptable level, at which point the valve will be closed again.
The liquid taken out of the system is usually brought to the burning central gas torch through the decompression head.
The resulting gas will then be released into the atmosphere.
If you have a gas system instead of a liquid, it is generally recommended that your safety valve exit be in the open air.
When the outlet is connected to the pipe, the opening of the valve will accumulate pressure downstream of the decompression device in the pipe system.
This may cause the valve not to be re-plugged when the system reaches optimal pressure.
If this sounds like the type of system you have installed, then it is recommended that you install the differential pressure relief valve.
This concentrates the pressure on an area much smaller than the opening in the valve.
This forces the pressure to drop significantly before the valve allows to close.
Sometimes, the bypass valve will be used in a system that can also help to decompress the reservoir by returning some or all of the fluid removed from the pump or compressor to the inlet or storage area of the pump.
This ultimately protects the compressor or pump and any other related equipment from excessive pressure.
Bypass equipment can be located inside the system, built directly as part of the pump, or can be installed as an external device, usually as part of the fluid path.
To prevent excessive hose pressure, these hoses are often found by fire engines.
Of course, high pressure is not the only reason the pressure relief valve must.
The pressure is too small to create a vacuum that is lower than the system\'s capacity.
Therefore, the valve sometimes opens when the pressure reaches too low.
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