Giant LP 122A User Manual

Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service

Models

Manual

LP122A Series/LP123

For Models

LP122A
LP122A-3100
LP122A-4000
LP123

Updated 6/00

Contents:

Installation Instructions: page 2
Pump Specifications: page 3
Exploded View: page 4
Parts List: page 5
Kit List/Torque
Specifications: page 6
Trouble Shooting: page 7
Repair Instructions: pages 8-10
Dimensions: page 11
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 1600 F, it is important to insure a positive head
to the pump to prevent cavitation. See NPSH curve.

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.

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.

Use SAE 90 Industrial gear oil

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.
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 device must be installed in the

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

2

Specifications

Models LP122A Series/LP123

Volume ............................................................................................... Up to 39.0 GPM (147.6 l/m)

Discharge Pressure ........................................................................... Up to 2000* PSI (138* Bar)

Inlet Pressure ..................................................................................... Up to 90 PSI (6.2 Bar)

Speed ................................................................................................. Up to 885 RPM

Plunger Diameter ............................................................................... 42 mm

Stroke ................................................................................................. 42 mm

Crankcase Oil Capacity ..................................................................... 116 fl.oz.

Temperature of Pumped Fluids .......................................................... Up to 160

Inlet Port ............................................................................................ 1-1/2" NPT

Discharge Port ................................................................................... 1" NPT

Crankshaft Mounting ......................................................................... Either Side

Shaft Rotation .................................................................................... Top of Pulley Towards Fluid End

Weight................................................................................................ 116 lbs.

Crankshaft Diameter ......................................................................... 35 mm

Valve Casing - LP122A ..................................................................... Aluminum Bronze

Valve Casing - LP123 ........................................................................ Brass

Valve Casing - LP122A-4000 ............................................................ 303 S.S.

Valve Casing - LP122A-3100 ............................................................ Aluminum Bronze-Nickle

Volumetric Efficiency @ 800 RPM ................................................... 0.96

Mechanical Efficiency @ 800 RPM ................................................. 0.85

o

F (71oC)

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

We recommend that a 1.1 service factor be specified
when s electing an electric motor as the power source.
To compute specific pump horsepower requirements,
use the following formula:

HORSEPOWER INFORMATION

among manufacturers.

1. Select GPM required, then select appropriate

HP = (GPM X PSI) / 1440

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.

Pump speeds of 640 RPM and above require a minimum inlet pressure of 12 psig.
Pump speeds of 805 RPM and above require a minimum inlet pressure of 14 psig.

LP122A SERIES/LP1 23 PULLEY SELECTI ON AND HORSEPOWER

REQUIREMENTS

GPM

22.3 12.75" 3.95" 500 9.6 12.7 15.9 20.7 31.9

24.7 12.75" 4.35" 555 10.6 14.1 17.6 22.9 35.3

28.5 12.75" 4.95" 640 12.2 16.3 20.4 26.5 40.7

30.9 12.75" 5.35" 695 13.2 17.7 22.1 28.7 44.1

33.4 12.75" 5.75" 750 14.3 19.1 23.9 31.0 47.7

35.6 12.75" 6.15" 800 15.3 20.3 25.4 33.1 50.9

39.4 12.75" 6.50" 885 16.9 22.5 28.1 36.6 56.3

PUMP

PULLEY

*

MOTOR
PULLEY

RPM 600 PSI 800 PSI 1000 PSI 1300 PSI 2000 PSI

*Intermittent duty only! - Consult factory!

3

Exploded View - LP122A Series/LP123

LP123

LP122A-3100

*LP122A-3100 Only!

LP122A-4000)

31 (LP122A and

*

*

4