Netafim NETAFLEX 3G, Руководство по установке

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14 NETAFLEX™ 3G INSTALLATION MANUAL
ON-SITE PREPARATIONS
The water distribution system
For the setup of the water distribution system the following components should be installed:
Components of the water distribution system
Component Specifications
Filling pump
Suitable for flow rate satisfying the maximum field requirement
(Ensure stable pressure).
Filling line filter ≤ 130 µm (≥ 120 mesh).
Pressure reducing valve
(PRV)
Should be installed on the filling line, downstream from the filling line filter
and be able to supply suitable pressure as specified for the NetaFlex™ 3G.
Fertilizer/acid stock tank Between 1 and 6 fertilizer/acid solution stock tanks
Manual valve (fertilizer) A manual ball valve on each fertilizer/acid line at the stock tank outlet
Fertilizer/acid filter ≤ 130 µm (≥ 120 mesh)
Water meter
With electrical pulses. The pulse should be as short as possible according
to the output line diameter and the controller's limitations.
(See the Recommended flow meter pulse rate table below.)
CAUTION
EC and pH sensors must never be exposed to pressure greater than 6 bars (87 PSI).
Recommended flow meter pulse rate
Flow rate
m
3
/hr
Flow meter output
l/pulse
Up to 6 1
6 - 60 10
Flow rate
GPM
Flow meter output
US gal/pulse
Up to 88 1
88 - 1000 10
The fertilizer/acid tanks and lines
For the setup of the fertilizer/acid tanks and lines, the following components should be installed:
Components of the fertilizer/acid tanks and lines
Component Specifications
Fertilizer/acid stock tank Between 1 and 6 fertilizer/acid solution stock tanks
Manual valve (fertilizer) A manual ball valve on each fertilizer/acid line at the stock tank outlet
Fertilizer/acid filter ≤ 130 µm (≥ 120 mesh)
The following aspects should be taken into account:
• Ensure the stock tanks are of sufficient size for storage of at least one day's consumption .
• Sufficient space should be available between the fertilizer/acid tanks and the NetaFlex™ 3G,
to enable inspection and maintenance operations.
• Fertilizer/acid pipe diameter: 32 mm (1¼") for dosing channels of up to 400 l/hr (106 GPH)
40 mm (1½") for dosing channels of over 400 l/hr (106 GPH)
• For the connection of fertilizer supply lines to the NetaFlex™ 3G, use a transparent, chemical-resistant,
reinforced PVC water hose with an internal diameter of 16 mm that will not contract when there is
a vacuum in the system.
• Use properly sealing stainless steel band clamps for the fertilizer/acid hose connection, type SS 316.