tefen MixRite TF5 Manual Del Usuario página 4

TEFEN
TEFEN Advanced Plastic Solutions.
Water with high particle content
(ex.: 120 mesh - 130 microns depending on your water quality) water filter must
be installed prior to the injector (see accessories), if a filter is not installed abrasive substances will
cause the injector to deteriorate prematurely.
Installing the injector on an irrigation line
It is recommended to fit a main valve (1) at the beginning of the line as well as a backflow
prevention valve (3). On a drinking water line, according to local regulations, it is obligatory to
install a backflow prevention valve to prevent entry of chemicals into the drinking water. Then as
shown in the diagram the following have to be installed: A pressure reducer (4) to protect the
injector from excess pressure, a filter (2) of at least 120 mesh (130 micron), a valve (6) before
entry to the injector, vacuum valve (7) to prevent siphoning when the injector is not operating, and
valves to the feed lines have then to be installed. It is advisable to add a bypass pipe through
which the water can flow to irrigation without fertilizer or when it is required to dismantle the
injector.
Installation of the injector on a bypass line
It is necessary to fit the proportional dosing injector to a bypass line when irrigation with a flow
rate higher than the maximum recommended for the injector. The bypass enables only part of the
water flow to pass through the bypass and activate the injector, while the reminder passes through
the main line. Using the choke valve (7) on the main line, the flow of water passing through the
main line is regulated so that the rest of the flow passes through the bypass and activates the
injector.
The metering must be calculated in accordance with the flow rate passing through both lines.
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