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Sprinkler

636 bytes added, 01:12, 30 May 2012
→‎Construction, operations and maintenance
==Construction, operations and maintenance==
[[Image:microsprinkler.jpg|thumb|right|300px|Microsprinklers. These emitters are low capacity rotary sprinklers designed for low discharges uniformly distributed over the irrigated area in a rainfall pattern. Made of durable plastic, they have various operating mechanisms, and are usually compact without external moving parts. Photo: FAO, [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CFQQFjAB&url=ftp%3A%2F%2Fftp.fao.org%2Fagl%2Faglw%2Fdocs%2Fpressirrig.pdf&ei=IXLFT-uSFMilsAKz6bynBg&usg=AFQjCNHeWvjBA4utqA--phzVhehEaf6zBA&sig2=7GcZPFMRxGrtH17V11Kkog TECHNICAL HANDBOOK ON PRESSURIZED IRRIGATION TECHNIQUES.]
 
Pressure is an important factor in successful sprinkler operation. Typical operating pressures range from 2 to 6 bar, and so energy requirements can be much greater than for surface irrigation. If sprinklers are working at the pressure recommended by the manufacturer then the distribution will be good. If the pressure is above or below this value then the distribution will be adversely affected. The most common problem is when pressure is too low and this happens when pump and pipes wear, increasing friction and so reducing pressure.
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