Pulsafeeder PULSAtron Series HV EN - Manual (Page 9)

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5.3.2 Stroke Length Adjustment
Stroke length can be controlled within 0 to 100% of the diaphragm displacement. It
should be controlled within 20 to 100% for practical use.
Stroke length can be set by means of the stroke length adjusting knob while the
pump is in operation. Do not turn the knob while the pump is stopped.
5.3.3 Controlling Procedure
Proper set points for stoke length and stroke frequency should be determined after
consideration of the pump and characteristics of the fluid. The following procedure is
recommended from the viewpoint of pump performance. Note: The closer the
stroke length is to 100%, the better the pump performance will be.
Set the stroke length to 100% then adjust the stroke frequency for coarse capacity
control.
Measure the capacity.
When the measured capacity is less than the required value, increase the stroke
frequency and measure the capacity again.
Then, adjust the stroke length for fine capacity control.
Finally, measure the capacity and make sure that the required value is obtained.
Example Selected Model = LPD4
Set Stroke Length = 100%
Set Stroke Rate = 100%
Output Capacity = 21 gallons per day (GPD)*
(Rated Pressure)
Desired Flow = 15 GPD
Adjust Stroke Rate to 80%
Output Capacity = 0.80 x 21 = 16.8 GPD*
Stroke Length Setting = 15 x 100 = 90% approximate
16.8
Thus to obtain the desired flow, stroke length is set at 90% and stroke rate is set at 80% i.e. output capacity = 0.90 x 0.80
x 21 = 15.12 GPD*
*IMPORTANT!
Check these values by measurement. Output capacity is higher when feeding against less than rated pressure
5.4 Control Panel Symbols
The pumps come with universally accepted symbols, the following is provided for your convenience.