-
31
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2. Adjustment of stroke rate
Stroke rate is adjusted by keys operation on the control unit. Stroke rate is adjusted from 1 to 360 spm.
Stroke rate fixed
100
%
75
50
25
0
25
20
50
75
100
%
Stroke length is adjusted.
360spm
270spm
180spm
Disch. capacity
Stroke length fixed
100
%
75
50
25
0
180
360
spm
Disch. capacity
Stroke rate
1-2. Adjustment of Discharge Capacity
Adjustment of the discharge capacity can be done by adjusting the stroke length and by adjusting the stroke
rate but basically it is done by adjusting the stroke rate. Stroke length adjustment is an auxiliary way when
the stroke rate adjustment is not enough.
Pay attention to the followings for the correct adjustment.
1) For the gaseous liquid such as sodium hypochlorite and hydragine solution, set the stroke length at 100 %
or near. Discharge flow may be reduced if the stroke length is short.
2) When the back pressure is high at discharge side, set the stroke length at 100 % or near.
1. Procedure to adjust the discharge capacity
Appropriate stroke length and stroke rate are decided considering the pump operating condition and liq-
uid characteristics or so. Following ways are recommended for proper calibration.
(1) Set the stroke length at 100 % to roughly adjust the discharge capacity by adjusting the stroke rate.
(2) Measure the discharge capacity.
(3) If the measured capacity is below the wanted value, increase the stroke rate and measure again the dis-
charge capacity.
(4) Adjust the stroke length to do the fine adjustment of the capacity.
(5) Measure again the discharge capacity to confirm the wanted capacity is discharged.
