TEFEN
TEFEN Advanced Plastic Solutions.
Connection to the Fertilizer Tank
Connect the suction tube to the fertilizer tank (preferably about 5cm (2") above the bottom). The
liquid fertilizer must be passed through a filter with at least a 120 mesh (130 micron).
If the fertilizer is drawn from an open tank, a heavy weight should be placed at the end of the
suction tube that will keep the opening of the suction tube inside the additive liquid and prevent
the tube from floating and failing outside the tank. Make sure that the level of the fertilizer is
always below the injector. Otherwise uncontrolled flow of the fertilizer may occur.
When connecting to a large fertilizer tank use a valve that is not affected by the fertilizer and an
N.C. valve to prevent the siphon effect. The valve will only open when there is water pressure
irrigation line.
Adjustment of Metering
On the metering cylinder there is a scale indicating the percentage of additives. When the entry
valve is closed and there is no water pressure in the injector, turn the adjustment control nut and
set its upper edge on the percentage required. Turning it counterclockwise increases the amount of
fertilizer metered. Turning it clockwise decreases the amount of fertilizer metered. The actual
fertilizer metering rate should be checked. If necessary, adjust by increasing or decreasing the
adjustment control nut.
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