Giant LP121A-5100, LP200-5100, LP250-5100 Operating Instructions/ Repair And Service Manual

Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service

Models

Manual

LP121A-5100/LP200-5100/LP250-5100

updated 02/19

Contents:

Installation Instructions: page 2
LP200-5100/LP121A-5100 Specs: page 3
Exploded View / Kits: page 4
Parts List: page 5
LP250-5100 Specs: page 6
Repair Instructions: page 7-9

Torque Specications: page 9

Pump Mounting Selection Guide: page 9
Troubleshooting: page 10
Recommended Spare Parts List: page 10
Dimensions: page 11
Warranty Information: back page

INSTALLATION INSTRUCTIONS

Operation and Maintenance

Check oil level prior to starting and ensure
trouble free water supply.

IMPORTANT! If there is a danger of frost,

the water in the pump and in the pump ttings

(particularly the unloader valve) must be emp­tied. The second discharge port can also be
used and the pump run “dry” for 1-2 minutes
for this purpose.

Oil: Use only 118 uid ounces (3.5 L) of SAE

90 Industrial gear lube oil. (Giant’s p/n 01154)

Initial change after 50 operating hours and
then every 1000 operating hours, or after one
year if used less.

Caution! When operating in damp places or
with high temperature uctuations, conden­sate (frothy oil) might occur in the gear box.
In this situation, change the oil immediately.

Keep NPSH under control.

Maximum input pressure is 145 PSI (10 bar),
the maximun suction head is -4.35 PSI (-0.3
bar). Make sure that suction pulsation is suf-

ciently dampened. Water column resonance

must be avoided.

Safety Rules

Pump operation without safety valve as well
as any excess in temperature or speed limits
automatically voids the warranty. The safety
valve must be regulated in accordance with
the guidelines for liquid spraying units so that
the admissible operating pressure can not be
exceeded by more than 10%.

When the pump is in operation, the open shaft
end must be covered up by a shaft protector
(21). For direct drive operations, the driven
shaft side and coupling must have a guard
over the connected area.

Pressure in discharge line and in pump must
be at zero before any maintenance to the

pump takes place. Close the uid supply to

the inlet port(s). Disconnect fuses to ensure
that the driving motor does not accidentally get
switched on. Make sure that all parts on the
pressure side of the unit are vented and re-

lled, with pressure at zero, before starting the

pump.

In order to prevent air, or air/water mixture
being absorbed and to prevent cavitation oc­curring, the pump-npshr, positive suction head
and water temperature must be kept under
control.

Required NPSH refers to water: Specic

weight 0.0624 lb/ft3 (1kg/dm3), viscosity 1°E at
maximum permissible revolutions.

Cavitation and/or compression of gases
lead to uncontrollable pressure kicks which
can ruin pump and unit parts and also be
dangerous to the operator or anyone stand­ing nearby.

Giant pumps are suitable for pumping clean
water and other non-aggressive or abrasive

media with a specic weight similar to water.

Before pumping other liquids - especially

inammable, explosive and toxic media -

the pump manufacturer must under all cir­cumstances be consulted with regard to the
resistance of the pump material. It is the re­sponsibility of the equipment manufacturer
and/or operator to ensure that all pertinent
safety regulations are adhered to.

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

2

Model LP200-5100 Specications

U.S Metric

Volume ..........................................................................................19.1 GPM ..................................... 72.2 LPM

Discharge Pressure ...................................................................... 3000 PSI ......................................... 200 Bar

Inlet Pressure ............................................................................... -4.35 to 87 PSI ...................... -0.3 to 6.0 Bar

Speed ...................................................................................................................................... Up to 1000 RPM

Plunger Diameter .......................................................................... 1.10” .................................................. 28 mm

Stroke ............................................................................................ 1.65” .................................................. 42 mm

Crankcase Oil Capacity ................................................................ 118 .oz. ................................................ 3.5 L

Temperature of Pumped Fluids @ 1000 RPM ............................... 140 o F ................................................. 60 oC

Temperature of Pumped Fluids @ 500 RPM ................................. 160 o F ..................................................70 oC

Inlet Port .................................................................................................................................... (3) x 1-1/2” BSP

Discharge Port ................................................................................................................................. (3) x 1” BSP

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

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

Weight .......................................................................................... 119 lbs. ................................................ 54 kg

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

Model LP121A-5100 Specications

U.S Metric

Volume ..........................................................................................32.5 GPM ................................... 123.1 LPM

Discharge Pressure ...................................................................... 1740 PSI .......................................... 120 Bar

Inlet Pressure ............................................................................... -4.35 to 87 PSI .......................-0.3 to 6.0 Bar

Speed ...................................................................................................................................... Up to 1000 RPM

Plunger Diameter .......................................................................... 1.42” .................................................. 36 mm

Stroke ............................................................................................ 1.65” .................................................. 42 mm

Crankcase Oil Capacity ................................................................ 118 .oz. ................................................ 3.5 L

Temperature of Pumped Fluids @ 1000 RPM ............................... 140 o F ................................................. 60 oC

Temperature of Pumped Fluids @ 500 RPM ................................. 160 o F ..................................................70 oC

Inlet Port .................................................................................................................................... (3) x 1-1/2” BSP

Discharge Port ................................................................................................................................. (3) x 1” BSP

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

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

Weight .......................................................................................... 119 lbs. ................................................ 54 kg

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

LP200 HORSEPOWER REQUIREMENTS

RPM GPM 1000 PSI 1500 PSI 2000 PSI 3000 PSI

500 9.6 6.6 9.9 13.2 19.9

640 12.2 8.4 12.6 16.8 25.2

750 14.3 9.9 14.8 19.7 29.6

805 15.4 10.6 15.9 21.2 31.9

865 16.5 11.4 17.1 22.8 34.1

920 17.6 12.1 18.2 24.3 36.4

1000 19.1 13.2 19.8 26.3 39.5

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.

LP121A HORSEPOWER REQUIREMENTS

RPM GPM 500 PSI 1000 PSI 1500 PSI 1740 PSI

500 16.3 5.6 11.2 16.9 19.6

640 20.8 7.2 14.4 21.5 25.0

750 24.4 8.4 16.8 25.2 29.3

805 26.2 9.0 18.1 27.1 31.4

865 28.1 9.7 19.4 29.1 33.7

920 29.9 10.3 20.6 30.9 35.9

1000 32.5 11.2 22.4 33.6 39.0

HORSEPOWER INFORMATION

We recommend that a 1.1 service factor be speci-

ed when selecting an electric motor as the power
source. To compute specic pump horsepower

requirements, use the following formula:

HP = (GPM X PSI) / 1450

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Exploded View - LP121A-5100, LP200-5100, and LP250-5100

Important! The stainless steel valve plugs (48) can seize when being screwed out of the casing.
To release tension beforehand, strike the plugs 1-2 times with a steel hammer on the top before
screwing them out. Coat threads with antiseize (e.g. Fel-Pro Nickel Anti-Seize 51119)

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