SPIS Toolbox - Irrigation Head - Revision history

Ranisha at 19:26, 21 July 2020

2020-07-21T19:26:54Z

Ranisha at 15:19, 21 July 2020

2020-07-21T15:19:09Z

Stefan Eibisch at 07:54, 7 May 2018

2018-05-07T07:54:42Z

Ranisha at 10:48, 22 March 2018

2018-03-22T10:48:53Z

Ranisha at 10:48, 22 March 2018

2018-03-22T10:48:32Z

Ranisha at 10:56, 14 November 2017

2017-11-14T10:56:49Z

Ranisha at 10:56, 14 November 2017

2017-11-14T10:56:27Z

Ranisha at 13:23, 13 November 2017

2017-11-13T13:23:16Z

Ranisha at 10:34, 13 November 2017

2017-11-13T10:34:38Z

Ranisha at 11:52, 21 September 2017

2017-09-21T11:52:43Z

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-| style="width: 150px; background-color: rgb(111, 142, 43);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;"><span class="link2">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
+| {{Next Chapter}}[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
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-| style="width: 150px; background-color: rgb(111, 142, 43);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;"><span class="link2">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
+| {{Next Chapter}}[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
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 <br/>{{SPIS Reference}}

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-| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span>
+| style="width: 150px; background-color: rgb(111, 142, 43);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;"><span class="link2">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
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-| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span>
+| style="width: 150px; background-color: rgb(111, 142, 43);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;"><span class="link2">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span></span>
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-| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color:#000000;"><span style="font-size: 90%">'''[[SPIS_Toolbox_-_Fertigation_System|►Go to the Next Chapter]]</span></span>
+| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span>
 |}
-=== '''<span style="color:#879637;">8. Irrigation Head</span>''' ===
+=== '''<span style="color: rgb(135, 150, 55);">8. Irrigation Head</span>''' ===
 The irrigation head is the part of the irrigation system where the water quantity, quality and pressure are managed. It is indispensable in irrigation systems that operate under pressure such as sprinkler and drip irrigation.
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 ===== '''Valves''' =====
-[[File:IrriHead.jpg|thumb|right|300pxpx|Irrigation head with a disc filter and multiple valves that guide the water to different sections of the irrigation system (Source: Lennart Woltering)]]
+[[File:IrriHead.jpg|thumb|right|300px|Irrigation head with a disc filter and multiple valves that guide the water to different sections of the irrigation system (Source: Lennart Woltering)]] The irrigation system is usually divided into several sections to improve the control of the quantity and pressure of water in the field. The water flowing in each section is controlled by manual or automatic valves. Automatic valves can be volume- or time-controlled. The producer determines the required irrigation volume per section, and the automatic valve closes as soon as the target value is reached. It is recommended to use volumetric valves especially in cases where water is directly pumped to the irrigation system without passing through a reservoir. The disadvantages of automatic valves include high costs and regular replacement, and it requires electricity to operate the device.<br/>
 ===== '''Filter''' =====
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 #Granulate/sand filter: these filters have a large capacity to remove particulates from water. Water is routed through a sand-filled metal tank where the sand traps large and small particles. Eventually the dirt accumulates in the space between the sand particles, requiring a backflushing with clean water. The sand filter requires high pressures for operating and backflushing, which makes it less suitable for SPIS.
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-| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color:#000000;"><span style="font-size: 90%">'''[[SPIS_Toolbox_-_Fertigation_System|►Go to the Next Chapter]]</span></span>
+| style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color: rgb(0, 0, 0);"><span style="font-size: 90%;">'''[[SPIS Toolbox - Fertigation System|►Go to the Next Chapter]]'''</span></span>
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+<br/>{{SPIS Reference}}

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 #disc filter: a disc filter element contains a stack of compressed discs with an overlapping series of grooves. Unfiltered water passes through the stack of tightly compressed discs and the water is forced to flow through the interlocking grooves of the disc rings where debris is trapped. Dirt particles are caught on a very large surface, which is the reason for the comparatively low pressure loss. For manual cleaning, the filter rings have to be taken out of the enclosure and rinsed with clean water. When using disc filters for SPIS, it is advisable to install the next larger model to reduce the characteristic pressure drop, which is proportional to the flow rate, or to install two filters working in parallel. The maintenance intervals should be short so as to significantly reduce the accumulated pressure loss. Automatic backflush systems work with considerably higher pressure and therefore do not suit the pressure minimizing concept of SPIS.
 #Granulate/sand filter: these filters have a large capacity to remove particulates from water. Water is routed through a sand-filled metal tank where the sand traps large and small particles. Eventually the dirt accumulates in the space between the sand particles, requiring a backflushing with clean water. The sand filter requires high pressures for operating and backflushing, which makes it less suitable for SPIS.
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 | style="width: 150px; background-color: rgb(222, 226, 192);" | <span style="color:#000000;"><span style="font-size: 90%">'''[[SPIS_Toolbox_-_Fertigation_System|►Go to the Next Chapter]]</span></span>
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 {{SPIS Reference}}

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 [[File:IrriHead.jpg|thumb|right|300pxpx|Irrigation head with a disc filter and multiple valves that guide the water to different sections of the irrigation system (Source: Lennart Woltering)]]
 The irrigation system is usually divided into several sections to improve the control of the quantity and pressure of water in the field. The water flowing in each section is controlled by manual or automatic valves. Automatic valves can be volume- or time-controlled. The producer determines the required irrigation volume per section, and the automatic valve closes as soon as the target value is reached. It is recommended to use volumetric valves especially in cases where water is directly pumped to the irrigation system without passing through a reservoir. The disadvantages of automatic valves include high costs and regular replacement, and they inhibit pressure loss through the device.
@@ Line 50: / Line 50: @@
 #disc filter: a disc filter element contains a stack of compressed discs with an overlapping series of grooves. Unfiltered water passes through the stack of tightly compressed discs and the water is forced to flow through the interlocking grooves of the disc rings where debris is trapped. Dirt particles are caught on a very large surface, which is the reason for the comparatively low pressure loss. For manual cleaning, the filter rings have to be taken out of the enclosure and rinsed with clean water. When using disc filters for SPIS, it is advisable to install the next larger model to reduce the characteristic pressure drop, which is proportional to the flow rate, or to install two filters working in parallel. The maintenance intervals should be short so as to significantly reduce the accumulated pressure loss. Automatic backflush systems work with considerably higher pressure and therefore do not suit the pressure minimizing concept of SPIS.
 #Granulate/sand filter: these filters have a large capacity to remove particulates from water. Water is routed through a sand-filled metal tank where the sand traps large and small particles. Eventually the dirt accumulates in the space between the sand particles, requiring a backflushing with clean water. The sand filter requires high pressures for operating and backflushing, which makes it less suitable for SPIS.
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← Older revision		Revision as of 13:23, 13 November 2017
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		+	\| {{Back to SPIS Toolbox 2}}
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		+	\| {{Back to Get Informed}}
		+	\|
		+	\| style="width: 150px; background-color: rgb(222, 226, 192);" \| <span style="color:#000000;"><span style="font-size: 90%">'''[[SPIS_Toolbox_-_Fertigation_System\|►Go to the Next Chapter]]</span></span>
		+	\|}

	=== '''<span style="color:#879637;">8. Irrigation Head</span>''' ===		=== '''<span style="color:#879637;">8. Irrigation Head</span>''' ===

← Older revision		Revision as of 11:52, 21 September 2017
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−	{{~~SPIS Banner~~}}{{Back to ~~Get Informed~~}}	+	{{Get Informed}}{{Back to SPIS Toolbox}}

	=== '''<span style="color:#879637;">Irrigation Head</span>''' ===		=== '''<span style="color:#879637;">Irrigation Head</span>''' ===