Giant GP7150A, GP7255A, GP7155A User Manual
Triplex Ceramic
Plunger Pump Manual
Models
GP7150A, GP7155A, GP7255A
Updated 03/06
Contents:
Installation Instructions
GP7155A/GP7255A: page 2
Pump Specifications: page 3
Parts List/Exploded View: pages 4-5
Pump Specifications
GP7150A: page 6
Recommended Spare
Parts List: page 7
Repair Instructions: page 7
Dimensions: back page
Warranty Information back page
INSTALLATION INSTRUCTIONS
Installation of the Giant Industries, Inc., pump is
not a complicated procedure, but there are some
basic steps common to all pumps. The following
information is to be considered as a general
outline for installation. If you have unique
requirements, please contact Giant Industries,
Inc. or your local distributor for assistance.
1. The pump should be installed flat on a base to a
maximum of a 15 degree angle of inclination to
ensure optimum lubrication.
2. The inlet to the pump should be sized for the
flow rate of the pump with no unnecessary restrictions that can cause cavitation. Teflon tape should
be used to seal all joints. If pumps are to be operated at temperatures in excess of 140
tant to insure a positive head to the pump to prevent
cavitation.
3. The discharge plumbing from the pump should be
properly sized to the flow rate to prevent line
pressure loss to the work area. It is essential to
provide a safety bypass valve between the pump and
the work area to protect the pump from pressure
spikes in the event of a blockage or the use of a shutoff gun.
4. Use of a dampener is necessary to minimize
pulsation at drive elements, plumbing, connections,
and other system areas. The use of a dampener with
Giant Industries, Inc. pumps is optional, although
recommended by Giant Industries, Inc. to further
o
F, it is impor-
reduce system pulsation. Dampeners can also
reduce the severity of pressure spikes that occur
in systems using a shut-off gun. A dampener
must be positioned downstream from the unloader.
5. Crankshaft rotation on Giant Industries, Inc.
pumps should be made in the direction designated by the arrows on the pump crankcase.
Reverse rotation may be safely achieved by
following a few guidelines available upon
request from Giant Industries, Inc. Required
horsepower for system
from the charts on pages 3 & 6.
6. Before beginning operation of your pumping
system, remember: Check that the crankcase
and seal areas have been properly lubricated per
recommended schedules. Do not run the pump
dry for extended periods of time. Cavitation
will result in severe damage. Always remember
to check that all plumbing valves are open and
that pumped media can flow freely to the inlet of
the pump.
Finally, remember that high pres
sure operation in a pump system has many
advantages. But, ifit is used carelessly
and without regard to its potential hazard,
it can cause serious injury.
operation can be obtained
IMPORTANT OPERATING CONDITIONS
Failure to comply with any of these conditions invalidates the warranty
1. Prior to initial operation, add oil to crankcase so
that oil level is between the two lines on the oil
dipstick. DO NOT OVERFILL. Use Giant
Recommended Oil (p/n 01154), which is equivalent to SAE 85-90W Industrial Grear Lube. Crankcase oil should be changed after the first 50 hours
of operation, then at regular intervals of 500 hours
or less depending on operating conditions.
2. Pump operation must not exceed rated
pressure, volume, or RPM.
device must be installed in the discharge of the
system.
3. Acids, alkalines, or abrasive fluids cannot be
pumped unless approval in writing is obtained
before operation from Giant Industries, Inc.
4. Run the pump dry approximately 10 seconds
to drain the water before exposure to freezing
temperatures.
A pressure relief
NOTE: Contact Giant Industries for Service School Information. Phone: (419)-531-4600.
2
Specifications
Model GP7155A, GP7255A
................................................................U.S. ........................ Metric
Volume.................................................... 65.8 GPM .............. 250 LPM
Discharge Pressure .................................1500 PSI ................. 100 Bar
Speed ......................................................2000 PSI ................. 138 Bar
Inlet Pressure ........................................................................... Up to 700 RPM
Plunger Diameter....................................2.17” ....................... 55mm
Plunger Stroke ........................................2.05”....................... 52mm
Crankshaft Diameter...............................1.89”....................... 48mm
Key Width...............................................0.55”....................... 14mm
Crankshaft Mounting............................................................... Either side
Shaft Rotation.......................................................................... Top of pulley towards manifold
Max.Temperature of Pumped Fluids ......140
Inlet Ports ................................................................................ (2) 2-1/2" NPT
Discharge Ports........................................................................ (2) 1-1/4" NPT
Weight.....................................................374 lbs. ................... 170 kg
Crankcase Oil Capacity ..........................1.6 Gal. ................... 6.0 liters
Fluid End Material GP7155A.................................................. Bronze
Fluid End Material GP7255A.................................................. Nickle Plated Spheroidical Cast Iron
Mechanical Effecency @ 700 RPM ........................................ 0.83
Volumetric Effecency @ 700 RPM ......................................... 0.96
o
F ..................... 60 oC
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.
GP7155A, GP7255A PULLEY SELECTION & HORSEPOWER
REQUIREMENTS
PUMP
PULLEY
12.75 9.00
12.75 9.75
12.75 10.75
12.75 11.70
12.75 12.75
MOTOR
PULLEY
RPM GPM 800 PSI 1000 PSI 1300 PSI 1500 PSI 2000 PSI
479 45.0 25.7 32.1 41.8 48.2 64.3
531 49.9 28.5 35.6 46.3 53.5 71.3
585 55.0 31.4 39.3 51.1 58.9 78.6
638 60.0 34.3 42.9 55.7 64.3 85.7
700 65.8 37.6 47.0 61.1 70.5 94.0
HORSEPOWER INFORMATION
Horsepower ratings shown are the power requirements 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:
(GPH X PSI) / 1450 = HP
3
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