Giant GP6124, GP6128 User Manual

Triplex Ceramic
Plunger Pump
Operating Instructions/
Manual

Model
GP6124 & GP6128

Updated 3/98

Contents:

Installation Instructions: page 2
Pump Specs.(GP6124): page 3
Exploded View: page 4
Parts List / Kits: page 5
Pump Specs.(GP6128): page 6
Repair Instructions: page 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

0

F, it is important to insure a positive head

140
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
charts on pages 3 and 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 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 the crank­case so that oil level is between the two lines on
the oil dipstick. DO NOT OVERFILL.

2. Pump operation must not exceed rated
pressure, volume, or RPM.

A pressure relief
device must be installed in the discharge of the
system.

SAE 80 Industrial Gear oil may be used.

3. Acids, alkalines, or abrasive fluids cannot be

Crankcase oil should be changed after the

first 50 hours of operation, then at regular

pumped unless approval in writing is obtained
before operation from Giant Industries, Inc.

intervals of 500 hours or less depending on
operating conditions.

4. Run the pump dry approximately 10 seconds
to drain the water before exposure to freezing
temperatures.

NOTE: Contact Giant Industries for Service School Information. Phone: [phone]

2

Specifications

Volume ........................................................................................................ Up to 12.8 GPM

Model GP6124

Discharge Pressure .................................................................................... Up to 5800 PSI

Speed .......................................................................................................... Up to 800 RPM

Inlet Pressure .............................................................................................. Up to 90 PSI

Plunger Diameter ........................................................................................ 24mm

Plunger Stroke ............................................................................................ 48mm

Crankshaft Diameter .................................................................................. 42mm

Key Width ................................................................................................... 12mm

Crankshaft Mounting .................................................................................. Either side

Shaft Rotation ................................................................................ Top of pulley towards manifold

Temperature of Pumped Fluids ................................................................... Up to 140

Inlet Ports ................................................................................................... (2) 1 1/2" NPT

Discharge Ports .......................................................................................... (2) 1" NPT

Weight......................................................................................................... 309 lbs.

Crankcase Oil Capacity .............................................................................. 1.9 Gal.

Fluid End Material....................................................................................... Stainless Steel

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

o

F

NOTES: 1 Positive inlet pressures are recommended!

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 factor 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) / 1400

GP6124 HORSEPOWER REQUIRMENTS

RPM GPM 1000 PSI 2500 PSI 4000 PS I 5800 P SI

400 6.4 4. 6 11.4 18.3 26.5
500 8.0 5. 7 14.3 22.9 33.2
600 9.6 6. 9 17.2 27.5 39.8
700 11.2 8.0 20.0 32.0 46.4
800 12.8 9.2 22.9 36.6 53.1

3