Irrigation Pumps and Sand Filters

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flower Active Contributor Join Date: Aug 2008 Posts: 23	Irrigation Pumps and Sand Filters 10/30/2008 10:24 AM
	Hi there.. i want to ask the capacity of the sand filters should be the same the pumps??if the flter's capacity is bigger is it ok?? If the filter is 550gpm and the pump 425 is it ok?? System is Suction from water tanks after to pumps after to filters for cleaning and after to irrigation discharge system.. Thanks!!
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DVader1000 Guru Join Date: May 2007 Location: Anywhere Emperor Palpatine assigns me Posts: 2774 Good Answers: 101	#1 Re: Irrigation Pumps - Sand filters.. 10/30/2008 12:59 PM
	It's okay for the filter to have a larger capacity: it'll just cost more and the filtration rate will be slower, though more effective. As long as there is sufficient applied pressure, the water will flow; in fact, it will even flow by gravity. The reverse is not true however: if the pump capacity is larger than the filter capacity, the filtration rate will be too fast to be effective. __________________ If only you knew the power of the Dark Side of the Force
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flower Active Contributor Join Date: Aug 2008 Posts: 23	#4 In reply to #1 Re: Irrigation Pumps - Sand filters.. 11/02/2008 1:08 AM
	Hi!!!! Thank you for your answer.. i want to ask smth else.. the filters should be installed on the suction pipe ( suction water from irrigation water tanks) or on the discharge pipe?? ( to the irrigation system)???
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DVader1000 Guru Join Date: May 2007 Location: Anywhere Emperor Palpatine assigns me Posts: 2774 Good Answers: 101	#5 In reply to #4 Re: Irrigation Pumps - Sand filters.. 11/02/2008 6:53 AM
	Usually on the discharge side of the pump to prevent ingestion of fine particles by the pump. __________________ If only you knew the power of the Dark Side of the Force
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Hendrik Guru Join Date: Jan 2007 Location: Centurion, South Africa Posts: 3921 Good Answers: 97	#2 Re: Irrigation Pumps - Sand filters.. 10/30/2008 2:59 PM
	One item to check - A filter will cause less back pressure at the reduced flow and as a centrifugal pump will deliver more at the lower head the power requirements may rise. Another concern is the backwash volume required. __________________ Never do today what you can put of until tomorrow - Student motto
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Anonymous Poster	#3 In reply to #2 Re: Irrigation Pumps - Sand filters.. 10/31/2008 11:44 AM
	The slower filtration through a sand filter can actually reduce the head loss across the filter substantially, reducing the energy required to pump water through the unit cross section of sand, though you will have a larger cross section of sand if the filter is oversized. Also, the slower pore velocities will increase the removal efficinecies for smaller particles.
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Anonymous Poster (1); DVader1000 (2); flower (1); Hendrik (1)

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