Giant MP4124-SWS, MP4120-SWS Operating Instructions/ Repair And Service Manual

Triplex Ceramic Plunger Pump

Operating Instructions/

Models

Repair and Service Manual

MP4120-SWS and
MP4124-SWS

Updated 07/18

Contents:

Installation Instructions: page 2

Pump Specications: page 3

Exploded View: page 4
Parts List / Repair Kits: page 5
Trouble Shooting: page 6
Repair Instructions: page 7-11

Torque Specications: page 11

Dimensions: page 11
Warranty Information: back page

INSTALLATION INSTRUCTIONS

Required NPSH refers to water: Specic

weight 1kg/dm3, viscosity 1 °E at max. per­missible revolutions.

Operation and Maintenance

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

Oil: Use 33.8 . ounces (1.0 liters) of Giant’s
part number 01154 or ISO VG 220 GL4 (e.g.
Aral Degol BG220) or SAE 90 GL4 gear oil.

Initial change after 50 operating hours and
then every 500 hours, after 6 months opera­tion in any case.

Caution when operating in damp places or

with high temperature uctuations. Oil must
be changed immediately, should condensate
(frothy oil) occur in the gear box.

Keep NPSH under control.

Max. input pressure 145 PSI (10 bar), max.
suction head -4.35 (-0.3 bar).

Pressure in discharge line and in pump must
be at zero before any maintenance to the
pump takes place. Close up suction line. Dis­connect fuses to ensure that the driving motor
does not get switched on accidentally.

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 an air/water-mixture

being absorbed and to prevent cavitation oc-

curring, the pump-NPSHR, positive suction

head and water temperature must be kept
under control.

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

abrasive media with a specic weight similar to

water.

Safety Rules

Before pumping other liquids - especially

inammable, explosive and toxic media

Pump operation without safety valve as well
as any excess in the 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

- 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.

not be exceeded by more than 10%.

When the pump is in operation, the open

shaft end must be covered up by shaft pro-

tector (21), the driven shaft side and coupling

by a contact protector.

Preventative Maintenance Check-List & Recommended Spare Parts List

Check Daily Weekly 50hrs Every Every Every
500 hrs 1500 hrs 3000 hrs

Oil Level/Quality X
Oil Leaks X
Water Leaks X

Belts, Pulley X

Plumbing X

Recommended Spare Parts

Oil Change (1 Quart) X X

Seal Kit (1 kit/pump) X
(See page 6 for kit lit)

Valve Spare Parts (1 kit/pump)

(See page 6 for kit list)

X

MP4120-SWS/MP4124-SWS PUMP SPECIFICATIONS

U.S. Measurements

Max.
Flow

Model GPM PSI RPM HP °F in Ft-Head

MP4120-SWS 8.9 3625 1450 23.1 160 0.787 24.6

MP4124-SWS 12.8 2610 1450 24 160 0.945 27.9

Metric Measurements

Max.
Flow

Model L/min bar RPM kW °C mm mWs

MP4120-SWS 33.8 250 1450 17.2 70 20 7.5

MP4124-SWS 48.6 180 1450 17.9 70 24 8.5

Consult the factory for special requirements that must be met if the

pump is to operate beyond one or more of the limits specied above.

Horsepower Ratings:

We recommend a 1.15 service factor be specied when selecting an electric motor as the power source.
To compute electric motor horsepower required, use the following formula: HP = (GPM X PSI) / 1450.
The formula to determine the horsepower required for a gas engine is: HP = (GPM X PSI) / 1150.

For the Application of a Hydraulic Motor:
To Determine the Torque of a Hydraulic Motor -- (GPM x PSI x 36.77) / RPM = Torque (in-lbs)

Max. Pres-

sure

Max. Pres-

sure

Max.

Speed

Max.

Speed

Power

Required

Power

Required

Max.

Temperature

Max.

Temperature

Plunger

Diameter

Plunger

Diameter

NPSH Re-

quired

NPSH Re-

quired

Calculating RPM / GPM of Pump:

A pump must be connected to an electric motor or gas or diesel engine with the correct ratio of pulleys

and belts to attain the required speed and GPM. The use of a Variable Frequency Drive (VFD) may also
be used to control the RPM of a properly sized electric motor when variable ows are required.

(Max. Pump RPM / Rated Pump GPM) x Required Pump GPM = Required Pump RPM

To calculate a pulley diameter one (1) pulley diameter and the required pump RPM must be known:

(Pump RPM x Pump Pulley Diameter) / Motor RPM = Motor Pulley Diameter
(Motor RPM x Motor Pulley Diameter) / Pump RPM = Pump Pulley Diameter

Common Specications:

Inlet Pressure ........................ 145 PSI (10 Bar)

Crankshaft Diameter.............. 1.10” (28 mm)

Crankcase Oil Capacity ......... 33.8 . oz. (1 L)

Inlet Ports .............................. (2) 1” NPT

Discharge Ports ..................... (2) 3/4” NPT

Materials Used for MP Pumps:

Manifold ........ Aluminum Bronze

Plungers ....... Solid Ceramic Oxide

Valves ........... High Grade Stainless Steel

Seals............. Nitrile with Fabric Reinforcing

Gear End ...... Spheroidal Cast Iron

Stroke (except MP4126) ........ 1.02” (26 mm)

Stroke (MP4126 only) ............ 1.18” (30 mm)

Weight ...................................66 lbs (30 kg)

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

Exploded View - MP4120-SWS/MP4124-SWS

4