ENCORE
®
700 METERING PUMP
the stroke length. Numbers on the scale represent percent stroke.
Each full turn of the knob will result in a 10% change of the stroke
length. Each graduation on the circular scale on the knob is equal to
0.25%.
•
Automatic Positioning: Pump can be equipped with an electric stroke
positioner. If applicable, refer to the separate instruction manual
provided with the equipment.
Strength of the Solution
Appropriate dilution of the solution will modify the concentration and,
therefore, the feed rate. This will increase or decrease the amount of
solution to be pumped per unit time. Adjusting the solution concentra-
tion can match the feed rate with the pump's capabilities and enhance
the metering repeatability.
WARNING
: TO AVOID POSSIBLE SEVERE PERSONAL INJURY, USE EX-
TREME CARE TO AVOID CONTACT WITH THE MATERIAL. CONSULT
YOUR CHEMICAL SUPPLIER FOR INSTRUCTIONS IN THE PREPARATION
OF SOLUTIONS AND THE HANDLING OF CHEMICALS.
Calibrating the Pump
Perform calibration on the suction side of the pump against actual
back pressure, so that piping will not have to be disturbed nor the
pumping process interrupted. Refer to Dwgs. 440.400.110.030 and
440.400.110.040.
To calibrate the pump, proceed as follows:
a.
Close the chamber valve of the calibration chamber and fill the cham-
ber to the top.
b.
With the pump running, close the in-line valve upstream of the cham-
ber and, at the same time, open the chamber valve.
c.
Using a stopwatch, note the length of time required to drop the cali-
bration chamber contents from the uppermost graduated line to a
suitable graduated line lower on the chamber. Open the in-line valve
and close the chamber valve to prevent air from being sucked into
the suction line and interrupting the pumping cycle.
d.
Divide the quantity withdrawn from the chamber in cc by the elapsed
time in minutes to obtain the pump rate in cc/minute.
(cc
/
minute) x 0.38 = gallons per day (gpd)
or
(cc
/
minute) x 1.44 = liters per day
WT.440.400.001.UA.IM.1012
28
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