7
Installation of two injectors in parallel
When the water flow rate in the irrigation line is higher than the maximum nominal flow rate of
the injectors, the water may be divided between two units. If the 2 injectors are used for
pumping the same type of additive the scales should be adjusted in an identical manner to the
same level of metering. Two different additives may be metered at different levels. The metering
in each unit must be calculated for each flow rate passing through the two injectors.
It is necessary to fit a main valve at
the beginning of the line (1), water
filter of 200 mesh (2), backflow
prevention valve (3) must be fitted to
a drinking water line, according to
local regulations, in order to prevent
entry of chemicals to the drinking
water. A pressure reducer (4), a T
junction from the main line into 2
lines (5). On each branch there
should be fitted a regulation valve
(6), the injector, a non-return valve
(7) after the outlet from the injector
and a return connection to the main
line (8) anti vacuum valve (9).
Both sides of the instillation
must
be
identical.
Connection to the additive tank
The suction tube should be connected to the additive tank (preferably about 5cm above the
bottom) – diagram A. The liquid additive must pass through a chemical resistant filter of 200
mesh, which must be cleaned regularly.
When making the connection to a large additive tank, use a chemical resistant valve and a
normally closed hydraulic valve to prevent a siphon effect.
The normally closed hydraulic valve should be connected to a hydraulic command tube.
If the additive is pumped from inside
an open tank (diagram B) a heavy
weight should be attached to the end
of the suction tube that will keep the
opening of the suction tube inside
the additive and prevent the tube
from floating and falling outside the
tank.
Make sure that the level of the
additive is always below the injector.
Otherwise uncontrolled flow of the
additive may occur.
Summary of Contents for MixRite TF-25
Page 1: ...MixRite TF 25 ...
