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‎References

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:Slovak term: [[Slovenský termín]]
# A device that controls both temperature and pressure, releasing water to atmosphere at predetermined settings (WHO 2006).
# Temperature and pressure relief valve is an automatic safety control valve fitted to a pressurised unvented hot water heater system to protect it from over temperature and/or over pressure failure (Councils of Standards Australia and New Zealand 2003).

==Explanation==
Temperature and pressure relief valve ensures that the temperature of the water in a
pressurised unvented water heater cannot exceed 99°C. Over heating will take place if the
normal heater thermostat controls fail. These valves guard against both over-temperature
and over-pressure hazards wherever water is stored in unvented containers. They can also
incorporate a vacuum breaking (air-inlet) device to protect the cylinder against implosion
during the contraction cycle in lower working pressure hot water cylinders. The pressure
relief setting should be not more than 20% greater than the input water supply pressure.
The pressure relief setting should rated at the same working pressure of the heat
(American Society of Sanitary Engineering 2007).

==Example==
Temperature and pressure relief valve will discharge at predetermined temperature and/or
pressures when the temperature of the water in a pressurised unvented water heater
exceeds 99°C, or the pre-set pressure exceeds its set pressure level. The valve will
discharge to ensure the unvented cylinder remains in a safe state (World Plumbing Council
Working Group 2008).

==References==
* American Society of Sanitary Engineering (2007) Plumbing Dictionary, Sixth Edition
* Councils of Standards Australia and New Zealand (2003). Plumbing and Drainage. Part 0.
* Glossary of terms. Australian /New Zealand Standards
* WHO (2006) [http://www.who.int/water_sanitation_health/publications/plumbinghealthasp/en/index.html Health aspects of plumbing]

==Links==
* [http://apps.who.int/thelexicon/ WHO — The Health and Environment Lexicon]

[[Category:EN]]

@@ Riadok 23: / Riadok 23: @@
 ==References==
 * American Society of Sanitary Engineering (2007) Plumbing Dictionary, Sixth Edition
-* Councils of Standards Australia and New Zealand (2003). Plumbing and Drainage. Part 0.
+* Councils of Standards Australia and New Zealand (2003). Plumbing and Drainage. Part 0. Glossary of terms. Australian /New Zealand Standards
 * WHO (2006) [http://www.who.int/water_sanitation_health/publications/plumbinghealthasp/en/index.html Health aspects of plumbing]

Temperature and pressure relief valve - História úprav

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