8
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:
In order to drive the pump from the side opposite the present shaft exten-
sion, 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 fac-
tor be specified when selecting
an electric motor as the power
source. To compute specific pump
horsepower requirements, use the
following formula:
HP = (GPM X PSI) / 1450
SPECIAL NOTE:
The theoretical gallons per revolution
(gal/rev) is 0.00738. To find specific
outputs at various RPM, use the
formula: GPM = 0.00738 x RPM
Specifications
Model P425
U.S. (Metric)
Volume
..........................................................
Up to 10.7 GPM
.............
(40.4 LPM)
Discharge Pressure ......................................
Up to 2465 PSI
...............
(170 bar)
Maximum Power Consumption
.....................
18.1 BHP
.........................
(13.5 kW)
Inlet Pressure ................................................
-4.35 to 145 PSI
..............
(-.3 to 10 bar)
Stroke ...........................................................
0.787”
..............................
(20mm)
RPM
.......................................................................................................
Up to 1450 RPM
Plunger Diameter ..........................................
0.98”
................................
(25mm)
Temperature of Pumped Fluids
.....................
Up to 160
o
F
...................
(70
o
C)
Inlet Ports ...............................................................................................
(2) 1” NPT
Discharge Ports .....................................................................................
(2) 3/4” NPT
Shaft Rotation ...............................................
Top of pulley towards manifold
Crankshaft Diameter .....................................
1.102”
..............................
(28mm)
Key Width
.....................................................
315”
.................................
(8mm)
Shaft Mounting
.......................................................................................
Either side
1
Weight ...........................................................
38.3 lbs.
...........................
(17.4 kg)
CrankcaseCapacity .......................................
30.4 fl.oz.
........................
(0.9 liters)
Volumetric Efficiency @ 1450
................................................................
(0.95)
Mechanical Efficiency @ 1450
...............................................................
(0.83)
NPSHR
.........................................................
26.2 foot of Head
.............
(8.0 meters of Head)
P425 HORSEPOWER REQUIREMENTS
RPM GPM 1000 PSI 1500 PSI 2000 PSI 2465 PSI
750 5.6
3.8
5.7
7.6
9.4
900 6.7
4.6
6.9
9.1
11.3
1010 7.5
5.2
7.7
10.2
12.7
1120 8.3
5.7
8.6
11.4
14.1
1240
9.2
6.3
9.5
12.6
15.6
1450 10.7
7.4
11.1
14.7
18.2
