Giant GP7124A User Manual
Model
GP7124A
Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service
Manual
Updated 5/98
Contents:
Installation Instructions: page 2
Pump Specifications: page 3
Parts List/Exploded View: pages 4-5
Repair & Service: pages 6-7
Torque Specifications: 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 F, it is important 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 shut-off
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 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 operation can be obtained from the
chart on page 3.
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 pressure
operation in a pump system has many
advantages. But, if it is used carelessly
and without regard to its potential hazard,
it can cause serious injury.
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 the oil level is between the two lines on the oil
dipstick. DO NOT OVERFILL. SAE 80 Indus-
trial Gear oil may be used. 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
2
Specifications
Model GP7124A
Volume ........................................................................................................ Up to 12.7 GPM
Discharge Pressure .................................................................................... Up to 10000 PSI
1
Speed .......................................................................................................... Up to 750 RPM
Inlet Pressure .............................................................................................. Up to 90 PSI
2
Plunger Diameter ........................................................................................ 24mm
Plunger Stroke ............................................................................................ 48mm
Crankshaft Diameter .................................................................................. 48mm
Key Width ................................................................................................... 14mm
Crankshaft Mounting .................................................................................. Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids................................................................... Up to 140
o
F
Inlet Ports ................................................................................................... (2) 1 1/4" NPT
Discharge Ports .......................................................................................... (2) 3/4" NPT
Weight......................................................................................................... 374 lbs.
Crankcase Oil Capacity .............................................................................. 1.6 Gal.
Fluid End Material....................................................................................... Stainless Steel
Volumetric Efficiency @ 700 RPM ............................................................ 89%
Mechanical Efficiency @ 700 RPM .......................................................... 83%
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:1Intermittent Duty 10.1 GPM @ 10,000 PSI. System Requirements:
No Unloader or Regulator allowed. Must use a safety valve and dump gun.
2
Positive inlet pressures are recommended!
GP7124A HORSEPOWER REQUIRMENTS
RPM GPM 3000 PSI 5000 PSI 6000 PSI 7250 PSI
300 5.1 10.9 18.1 21.7 26.3
400 6.8 14.5 24.2 29.0 35.0
550 9.3 19.9 33.2 39.9 48.2
600 10.1 21.7 36.2 43.5 52.5
650 11.0 23.6 39.3 47.1 56.9
700 11.8 25.4 42.3 50.7 61.3
750 12.7 27.2 45.3 54.3 65.7
RPM GPM 10000 PSI*
600 10.1 71.4
*FOR INTERMITTENT DUTY ONLY!
MUST RUN PUMP WITH A DUMP GUN AND SAFETY VALVE!
AN UNLOADER AND REGULATOR MUST NOT BE USED!
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
= hp
1400
3
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