Giant GP7122 User Manual
Model
GP7122
Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service
Manual
Contents:
Installation Instructions: page 2
Pump Specifications: page 3
Exploded View: page 4
Parts List: page 5
Kits: page 6
Torque Specifications: page 6
Repair Instructions: pages 7-10
Dimensions: page 11
Warranty Information: back page
INST ALLATION 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 140o F, it is important to insure a positive head to the pump to prevent
cavitation.
IMPORTANT! To guarantee weep return, it is
essential that the inlet line is fitted to the support
screw (#62). If the inlet line is mounted to the
other side of the pump, then the whole connection
part (#s 62-62B, 64, 69-71) must be fitted to the
same inlet side.
3. A tube fitting on the side of the pumphead which
allows the circulation of water between the valve
casing and seal sleeves to take place. The tube fitting
must always be mounted on the same side as the
suction line.
4. 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.
5. 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.
6. 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.
7 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 GP7122
30
26
23
0 500 600 700
RPM
NPSHR Chart
NPSHR(FT-HEAD) Viscosity = 1 Centipoise
Volume ........................................................................................................ Up to 9.9 GPM
Discharge Pressure ..................................................................................... Up to 10,000 PSI
Speed .......................................................................................................... Up to 750 RPM
Inlet Pressure .............................................................................................. Up to 90 PSI
Plunger Diameter ........................................................................................ 22mm
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 oF
Inlet Ports ................................................................................................... (2) 1 1/4" BSP
Discharge Ports........................................................................................... (2) 3/4" BSP
Weight......................................................................................................... 374 lbs.
Crankcase Oil Capacity .............................................................................. 1.6 Gal.
Fluid End Material ..................................................................................... Stainless Steel
Volumetric Efficiency @ 750 RPM............................................................ 89%
Mechanical Efficiency @ 750 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.
1
Positive inlet pressures are recommended!
2
To convert to FNPT threads, add 13377-0100 (Adapter) and 13376-0100 (Seal)
3
To convert to FNPT threads, add 14081-0100 (Adapter) and 14082 (Seal)
1
2
3
System Requirements: No Unloader or Regulator allowed. Must use a safety valve and dump gun.
90
85
750 RPM
80
Decibels
75
70
0 2900 5800 8700 11,600
RPM GPM 3000 PSI 5000 PSI 6000 PSI 7250 PSI 10000 PSI
500 RPM
Pressure (PSI)
GP7122 HORSEPOWER REQUIREMENTS
300 4.0 8.6 14.3 17.1 20.7 28.6
400 5.3 11.4 18.9 22.7 27.4 37.9
550 7.3 15.6 26.1 31.3 37.8 52.1
600 7.9 16.9 28.2 33.9 40.9 56.4
650 8.6 18.4 30.7 36.9 44.5 61.4
700 9.2 19.7 32.9 39.4 47.6 65.7
750 9.9 21.2 35.4 42.4 51.3 70.7
90
85
80
Decibels
75
70
0 2900 5800 8700 11,600
Pressure (PSI)
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
Exploded View - GP7122
4
Must be on inlet connection
side. See note on pg. 2.
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