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NOTES:
In order to drive the pump from the side opposite the present shaft
extension, simply remove the valve casing from the crankcase and
rotate the pumps 180 degrees to the desired position. Be certain to
rotate the seal case (item #20) as well, so that the weep holes are
down at the six o'clock position. Exchange the oil fill and the oil
drain plugs, also. Refer to the repair instructions as necessary for
the proper assembly sequence.
HORSEPOWER RATINGS:
The rating shown are the power
requirements for the
pump. Gas
engine power outputs must be
approximately twice the pump
power requirements shown above.
We recommend a 1.15 service factor
be specified when selecting an
electric motor as the power source.
To compute specific pump horse
power requirements, use the
following formula:
HP = (GPM X PSI) / 1450
Consult the factory for special requirements that must be met if the pump is
to operate beyond one or more of the limits specified above.
SPECIAL NOTE:
The theoretical gallons per revolution
(gal/rev) is 0.0089.
To find specific outputs at various RPM,
use the formula: GPM = 0.0089 x RPM
U.S. (Metric)
Volume................................................................ Up to 12.9 GPM ................. (48.8 LPM)
Discharge Pressure.............................................. Up to 2175 PSI ................... (150 bar)
Inlet Pressure....................................................... -4.35 to 145 PSI.................. (-.3 to 10 bar)
Stroke .................................................................. 0.945” ................................. (24mm)
RPM .................................................................................................................. Up to 1450 RPM
Plunger Diameter ................................................ 0.98” ................................... (25mm)
Temperature of Pumped Fluids........................... Up to 160
o
F........................ (71
o
C)
Inlet Ports .......................................................................................................... (2) 1" NPT
Discharge Ports ................................................................................................. (2) 3/4" NPT
Shaft Rotation ..................................................... Top of pulley towards fluid end
Crankshaft Diameter ........................................... 1.1” ..................................... (28mm)
Key Width ........................................................... 0.315” ................................. (8mm)
Shaft Mounting ................................................................................................. Either side
1
Weight................................................................. 36 lbs. 11oz......................... (16.6 kg)
Crankcase Capacity............................................. 27 fl.oz. ............................... (0.8 liters)
Volumetric Efficiency @ 1450 ......................................................................... (0.95)
Mechanical Efficiency @ 1450......................................................................... (0.86)
Specifications
ModelS P420A, P420A-0011, P420A-0021
P420 HORSEPOWER REQUIREMENTS
RPM GPM 1000 PSI 1500 PSI 1700 PSI 2175 PSI
785 7.0 4.8 7.2 8.2 10.4
900 8.0 5.5 8.3 9.3 12.0
1010 9.0 6.2 9.3 10.5 13.4
1120 9.9 6.8 10.2 11.7 14.9
1240 11.0 7.6 11.4 12.8 16.5
1450 12.9 9.0 13.3 15.1 19.3