Pressure reducing valve: Difference between revisions
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A pressure reducing valve (PRV) is a device for reducing the input pressure of a gas or liquid to a predetermined output pressure. |
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#REDIRECT [[Safety valve]] |
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Domestic water PRV's are generally found between the mains water supply and a sealed water heating system, typically a space heating system or a sealed hot water system. Gas Pressure Reducing Valves are found in the connection to all domestice gas cylinders; this is essential as the liquid gas in the cylinder is at a very high pressure. |
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Pressure reducing valves should not be confused with [[Safely Valves]]; the latter are valves which usually open at a pre-set critical pressure or temperature which is higher than permitted by the system, and they allow the gas or liquid to escape, usually to the atmosphere. Some [[Safely Valves]], for example on an oil boiler, will shut off the oil supply in the event of a rise above a certain temperature, for example if a fire were to occur. |
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Most safety valves are factory pre-set and normally should not be tampered with. |
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Revision as of 20:06, 1 June 2007
A pressure reducing valve (PRV) is a device for reducing the input pressure of a gas or liquid to a predetermined output pressure.
Domestic water PRV's are generally found between the mains water supply and a sealed water heating system, typically a space heating system or a sealed hot water system. Gas Pressure Reducing Valves are found in the connection to all domestice gas cylinders; this is essential as the liquid gas in the cylinder is at a very high pressure.
Pressure reducing valves should not be confused with Safely Valves; the latter are valves which usually open at a pre-set critical pressure or temperature which is higher than permitted by the system, and they allow the gas or liquid to escape, usually to the atmosphere. Some Safely Valves, for example on an oil boiler, will shut off the oil supply in the event of a rise above a certain temperature, for example if a fire were to occur.
Most safety valves are factory pre-set and normally should not be tampered with.