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V.
Start-Up
A.
Priming the pump
Plug in pump, set stroke to 100% and strokes per minute to maximum speed. While pump
is operating, if fluid begins moving, no further priming is required. If fluid is not moving, open
bleed valve approximately one turn until fluid begins to move. When suction line fills, close
bleed valve. Do not over tighten bleed valve. Damage may occur.
B.
Adjusting feed rate
The standard FlexFlow allows for the exact setting of the pumps stroking rate (speed) on the
pump's control panel. Standard strokes per minute settings available are: 1, 2, 3, 4, 5, 6, 7,
10, 15 and increase by 5 thereafter up to the maximum of 125 (B-155 models have a max
speed of 160 strokes/minutes).
C.
Stroke length
The stroke length can be adjusted on all FlexFlow™ pumps. This adjustment is a
mechanical adjustment made using the large knob on the control panel. To avoid damage to
the pump, this adjustment should only be made while the pump is running at a high stroking
rate.
D.
Calculating Output
A pump's output per minute can be determined by dividing the maximum rated gallons per
day by 1440 (minutes per day). For example, a 30 gallons per day (gpd) pump at a maximum
stroke length and speed setting of 125 strokes per minute (spm) will pump 0.000167 gallons
per stroke (gps).
With this value and the pump's speed setting (strokes per minute) you can calculate your
pump's output at it's rated pressure. A 30 gpd pump set at 50 strokes per minute:
Reducing the stroke length will reduce the pump's output again. If the example pump above
had it's stroke length reduced to 50% the 12.02 gallons per day output is reduced to 6.01.
(example: 12.02 gpd x 0.50 = 6.01 gpd)
A higher product viscosity will reduce the output. Pressures lower than the pump's rating can
increase the output.
E.
Optional Features
A pump's output per minute can be determined by dividing the maximum rated gallons per
day by 1440 (minutes per day). For example, a 30 gallons per day (gpd) pump at a maximum
stroke length and speed setting of 125 strokes per minute (spm) will pump 0.000167 gallons
1. External Pacing
The external pacing option allows the speed of the pump to be controlled by an external
device like a flow meter that gives dry contact switch closures. The pump sends out a 5 volt
D.C. current to read a switch closure. Each time the pump sees the switch closure it strokes
once, up to its maximum strokes per minute rate.
30 ÷ 1440 = 0.0208 gpm ÷ 125 spm = 0.000167
50spm x .000167gps x 1440 (minutes per day) = 12.02 gallons per day
7
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