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Adjustment of Discharge
The set values of the stroke length and stroke rate should be determined with full consideration of the operating
conditions of the pump and the properties of the liquid to be handled. Adjust the discharge.
•
There are two ways of adjusting the discharge: adjustment of stroke rate and adjustment of stroke length.
•
The former is generally used. Adjustment of stroke length is done for the range that cannot be covered adjustment
of stroke rate.
Adjustment of stroke rate (For reference only)
The discharge should be adjusted properly, referring to the following description.
q
If the liquid tends to generate air bubbles (sodium hypochlorite (NaOC1), hydrazine solution (N
2
H
2
H
2
O), etc.), keep
the stroke length at around 100% and adjust the stroke rate.
•
When the stroke length is set at a very low level, the discharge may gradually decrease.
w
When the back pressure on the discharge side is high, keep the stroke length at around 100% and adjust the stroke
rate.
e
If the reaction to a discharge per shot fluctuates violently due to neutralization or titration, shorten the stroke length
to reduce the discharge and use the stroke rate for further adjustment.
z
Procedure for Discharge Adjustment Viewed from the
angle of pump performance, the following is the best
way.
q
Set the stroke length at 100% and roughly adjust the
discharge by the stroke rate.
w
Measure the discharge.
e
If the discharge is less than the required amount, increase the stroke rate and measure the discharge again.
r
Fine-turn the discharge by adjusting the stroke length.
t
Measure the discharge for the last time to confirm that the required amount is discharged.
- 30 -
360spm
(Storke length fixed at 100%)
270spm
(Storke length fixed at 75%)
180spm
(Storke length fixed at 50%)
Discharge
Adjusted stroke length
Fixed stroke rate
