Giant LP 122A service manual Specifications Models LP122A Series/LP123

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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 160oF (71oC)

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

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.

HORSEPOWER INFORMATION

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:

HP = (GPM X PSI) / 1440

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/LP123 PULLEY SELECTION AND HORSEPOWER

REQUIREMENTS

GPM

PUMP

MOTOR

RPM

600 PSI

800 PSI

1000 PSI

1300 PSI

2000 PSI

PULLEY

PULLEY

 

 

 

 

 

 

 

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

*Intermittent duty only! - Consult factory!

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Contents Updated 6/00 LP122A LP122A-3100 LP122A-4000 LP123 ContentsImportant Operating Conditions Installation InstructionsSpecifications Models LP122A Series/LP123 Exploded View LP122A Series/LP123 = LP122A = LP123 = LP122-4000 = LP122A-3100 LP122A SERIES/LP123 Parts ListLP122A SERIES/LP123 Pump Repair Kits LP122A SERIES/LP123 Torque SpecificationsPumpsystemmalfunction LP122A Series/LP123 Repair Instructions To Reassemble Proceed AS Follows Place support ring 41 and v-sleeves 40 into valve casing Page Giant Industries Limited Warranty