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3.1 Chemical Injection Flow Rate Adjustment
There are two ways of adjusting the injection flow rate, 1) electronic variable flow and 2) stroke
length adjustment .
The two methods can be used together to finely tune the flow rate.
Depending on the type of electric motor selected, two types of electric variable flow control can
be achieved. The cycles per minute (cpm) can be altered from maximum by either slowing the
electric motor with an electronic variable speed control device or preferably by using a Cycle Timer
to ‘start’, ‘stop’ and vary the ‘stop’ time of the electric motor. We recommend using a cycle timer
as it is simpler, more cost effective, robust, capable of operating at more extreme ambients and
has been found to use less energy per volume of chemical injected.
Solar Injection Australia manufactures a range of DC Timers, please contact us or an SiA Distributor
for details.
3.11 Electronic Variable Flow Adjustment
All drives, except those with a Duplex Liquid End configuration (ie 2 liquid ends on the 1 drive),
are fitted with a mechanical stroke length adjustor that allows the operator to adjust the length
of the stroke and therefore the output per cycle infinitely between 0% and 100% while the pump
is running.
Simply twist the adjustor until the desired flow is achieved. The lock nut provided will hold the
chosen setting.
An optional micrometer stroke adjustor is available on request.
3.12 Stroke Length Adjustment
Manual Stroke
Length Adjustor
Lock Nut