https://geonika.agis.uniba.sk/tsenz/index.php?action=history&feed=atom&title=Back_pressure 2026-04-09T17:56:50Z História úprav pre túto stránku na wiki MediaWiki 1.31.1 https://geonika.agis.uniba.sk/tsenz/index.php?title=Back_pressure&diff=196&oldid=prev 2014-07-21T10:32:11Z

<p>Importing text file</p> <p><b>Nová stránka</b></p><div>:Slovak term: [[Slovenský termín]]<br /> # Back Pressure is the resistance against the flow of a fluid caused by the down stream pressure or resistance becoming greater than the supply pressure. (WHO et al. 2006).<br /> # The reversing of normal flow resulting from a pressure downstream that is higher than the supply pressure in the distribution piping of a drinking-water supply system (WHOet al. 2006).<br /> <br /> ==Explanation==<br /> Back Pressure is the resistance to the movement of a fluid in a piped system. It can be<br /> generated by gravity or head pressure, or the resistance force against a moving fluid by<br /> obstructions such as changes of direction in piping systems. The expansion of a liquid in a<br /> plumbing system due to a temperature rise can also generate a back pressure. (ASSE<br /> 2007).<br /> <br /> Pressure is defined as force per unit area. It is usually more convenient to use pressure<br /> rather than force to describe the influences upon fluid behaviour. The standard unit for<br /> pressure is the Pascal, which is a Newton per square meter (World Plumbing Council<br /> Working Group 2008).<br /> <br /> A pressure difference that can cause water to backflow into the water supply when a user's<br /> water system is at a higher pressure than the public water system (Symons et al. 2000).<br /> <br /> ==Example==<br /> Back pressure can be found where a pump, pumping fluid through a pipe meets a<br /> resistance force, as this force increases there is a corresponding decrease in the capacity<br /> of the pump to function as designed, thus reducing the pump performance (World Plumbing<br /> Council Working Group 2008).<br /> <br /> ==References==<br /> * National Plumbing Regulators Forum (2004) Plumbing code of Australia.<br /> * Symons JM, Bradley LC Jr and Cleveland TC (2000) The Drinking Water Dictionary.<br /> * WHO and the World Plumbing Council (2006) [http://www.who.int/water_sanitation_health/publications/plumbinghealthasp/en/index.html Health aspects of plumbing].<br /> * American Society of Sanitary Engineering (ASSE) (2007) Plumbing Dictionary, Sixth<br /> * Edition.<br /> <br /> ==Links==<br /> * [http://apps.who.int/thelexicon/ WHO — The Health and Environment Lexicon]<br /> <br /> [[Category:EN]]</div>

Vrut