Adjust Feed Rate; Adjust Stroke Length; Calculate Output - Graco Mongoose Series Instructions - Parts Manual

Operation

Adjust Feed Rate

The Mongoose pump allows for the exact setting of the
pump's SPEED knob (H) on the pump's control panel.
See F . 5.
IG
H
F . 5: Mongoose Control Panel
IG
NOTE: Standard cycles per minute settings available
are: 1, 2, 3, 4, 5, 6, 7, 8, 10, and increase by 5 thereafter
up to the maximum of 125.
10

Adjust Stroke Length

The stroke length can be adjusted on the Mongoose
pump. This is a mechanical adjustment made using
STROKE % knob (J) 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.

Calculate Output

J
A pump's output per minute can be determined by divid-
ing the maximum rated gallons per day by 1440 (min-
utes per day).
For example, a 30 gallons per day (gpd) pump at a max-
imum stroke length and speed setting of 125 cycles per
minute (cpm) will pump 0.000167 gallons per stroke
(gps).
30 gpd ÷ 1440 min/day = 0.0208 gpm ÷ 125 spm =
With this value and the pump's speed setting (cycles per
minute) you can calculate your pump's output at it's
rated pressure.
A 30 gpd pump set at 50 cycles per minute:
50 cpm x .000167 gps x 1440 min/day = 12.02 gpd
Reducing the stroke length will reduce the pump's out-
put 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. Pres-
sures lower than the pump's rating can increase the out-
put.
NOTICE
0.000167 gal/stroke
3A4131H