4
P56W/P56W-HK PULLEY SELECTION & HORSEPOWER
REQUIREMENTS
PUMP
PULLEY
MOTOR
PULLEY
RPM GPM 500 PSI 1000 PSI 1500 PSI 1900 PSI 2200* PSI
7.75"
4.00"
851
3.7
1.3
2.5
3.8
4.8
5.6
7.75"
4.50"
967
4.2
1.4
2.9
4.3
5.5
6.3
7.75"
5.00"
1084
4.7
1.6
3.2
4.8
6.1
7.1
7.75"
5.50"
1201
5.2
1.8
3.6
5.3
6.8
7.8
7.75"
6.00"
1317
5.7
2.0
3.9
5.9
7.4
8.6
7.75"
6.45"
1420
6.1
2.1
4.2
6.3
7.9
9.2
7.75"
7.75
1750*
7.5
2.6
5.1
Ratings (Continuous) ................................ 6.1 GPM ( 23 lm) @ 1900 PSI (131 bar) @ 1420 RPM
Ratings (Intermittent) ................................ 6.0 GPM (23 lm) @ 2200 PSI (152 bar) @ 1750 RPM
Ratings (Intermittent) .................................. 7.5 GPM (28 lm) @ 1000 PSI (69 bar) @ 1750 RPM
Inlet Pressure .......................................................................................... Up to 90 PSI
Plunger Diameter .................................................................................... 20mm
Stroke ..................................................................................................... 18.1mm
Crankcase Oil Capacity .......................................................................... 14 fl.oz. (414 ml)
Temperature of Pumped Fluids ....................................................... Up to 160
o
F ( 71
o
C)(P56W)
................................................................................................ Up to 190
o
F ( 88
o
C)(P56W-HK)
Inlet Ports ............................................................................................... (2) 1/2" BSPP
Discharge Ports ...................................................................................... (2) 3/8" BSPP
Crankshaft Mounting .............................................................................. Either
Shaft Rotation ............................................................................Top of Pulley Towards Fluid End
Weight .................................................................................................... 18 lbs. (8.16 kg)
Crankshaft Diameter ............................................................................... 24mm
Volumetric Efficiency @ 1420 RPM ....................................................... 0.94
Mechanical Efficiency @ 1420 RPM ...................................................... 0.86
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.
Specifications
Models P56W / P56W-HK
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 require-
ments for the pump. Gas engine power outputs
must be approximately twice the pump power
requirements shown above.
We recommend that 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
=hp
1460
*Intermittent Duty Only
