3
U.S. ......................... (Metric)
Volume.......................................................... 20.6 GPM .............. 78.0 LPM
Discharge Pressure ......................................4060 PSI ................. 280 bar
Power Required ............................................56.0 BHP ................. 41.8 kW
Speed (Continuous)...................................... ................................ 1000 RPM
Inlet Pressure (maximum) ............................
-4.35 to145 PSI
......
-0.3 to 10 bar
Plunger Diameter..........................................1.1” .......................... 28 mm
Crankshft Stroke ...........................................1.81” ........................ 46 mm
Crankshaft Diameter.....................................
1.38”
........................
35 mm
Crankshaft Mounting ..................................................................... Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids ....................Up to 140
o
F ............. (60
o
C)
Inlet Ports ......................................................................................
(3) 1-1/2” NPT
Discharge Ports ............................................................................. (2) 1” NPT
Weight ..........................................................179 lbs. ................... (81 kg)
Crankcase Oil Capacity ................................1.2 Gal. ................... (4.6 liter)
Fluid End Material......................................... ................................ Nickel-Plated Spheroidical Cast Iron
Specifications
Model GP5128
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.
PULLEY INFORMATION
Pulley selection and pump speed are based on
a 1725 RPM motor and “B” section belts. When
selecting desired GPM, allow for a ±5% tolerance
on pumps output due to variations in pulleys, belts
and motors among manufacturers.
1. Select GPM required, then select appropriate
motor and pump pulley from the same line.
2. The desired pressure is achieved by selecting
the correct nozzle size that corresponds with the
pump GPM.
HORSEPOWER INFORMATION
Horsepower ratings shown are the power re-
quirements for the pump. Gas engine power
outputs must be approximately twice the pump
power requirements shown above.
We recommend that a 1.15 service factor be speci-
fied when selecting an electric motor as the power
source. To compute specific pump horsepower
requirements, use the following formula:
(GPM X PSI) / 1450 = HP
GP5128 Horsepower Requirements
RPM
GPM
1000 PSI
2000 PSI
3000 PSI
4060 PSI
600
12.4
8.6
17.1
25.7
34.7
700
14.4
9.9
19.9
29.8
40.3
800
16.5
11.4
22.8
34.1
46.2
900
18.5
12.8
25.5
38.3
51.8
1000
20.6
14.2
28.4
42.6
57.7
Summary of Contents for GP5128
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