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GP7128 HORSEPOWER REQUIREMENTS
RPM GPM 3000 PSI 4000 PSI 5000 PSI 5800 PSI
300 7.2 15.4 20.6 25.7 29.8
400 9.5 20.4 27.1 33.9 39.4
550 13.1 28.1 37.4 46.8 54.3
600 14.3 30.6 40.9 51.1 59.2
650 15.5 33.2 44.3 55.4 64.2
700 16.7 35.8 47.7 59.6 69.2
750 17.9 38.4 51.1 63.9 74.2
Flow ..................................................................... 17.9 GPM ..................... 67.7 Liters/minute
Discharge Pressure ............................................. 5800 PSI
1
......................................
400 Bar
1
Crankshaft Speed ....................................................................................... 750 RPM
Inlet Pressure (maximum) ................................... -4.35 to 145 PSI ........... -0.3 to 10 Bar
Plunger Diameter.................................................1.1”............................... 28 mm
Plunger Stroke ..................................................... 2.1”............................... 52 mm
Crankshaft Diameter ...........................................1.9”............................... 48 mm
Key Width ............................................................ 0.6”............................... 14 mm
Crankshaft Mounting .................................................................................. Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids............................140
o
F ........................... 60
o
C
Inlet Ports ................................................................................................... (2) 1-1/4" BSP
Discharge Ports .......................................................................................... (2) 3/4" BSP
Weight .................................................................. 375 lbs. ......................... 170 Kg
Crankcase Oil Capacity ....................................... 1.6 Gal. ......................... 6 Liters
Fluid End Material....................................................................................... Stainless Steel
Volumetric Efficiency @ 700 RPM ............................................................ 89%
Mechanical Efficiency @ 700 RPM .......................................................... 83%
Specifications
Model GP7128
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 1.1 service factor be specified
when selecting an electric motor as the power
source.
To compute specific pump horsepower requirements,
use the following formula:
GPM X PSI
1400
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.
NOTES:
1
This specification for maximum pressure and maximum speed apply to
intermittent duty. When the pump is used for continuous duty and/or with
water warmer than 100
o
F, these values must be reduced by 10%.
= hp
3