Submersible General Dewatering High Head Pumps

LH/LH-WGSZ-4

Printed on recycled paper with soy ink -Evidence of our commitment to the environment

Amenities from Technologyfor People and the Earth

Extra endurable to high water pressure.

Ideal for high-head pumping operations.

1

Oil Lifter (Patented)

Seal pressure relief system (Except 3.0kW models)

In stoppage On startup During operationOil Lifter Motor

shaft

Oil

This Oil Lifter was developed to improve quality and reliability of our submersible pump by enhancing sealing performance of the mechanical seal.

* The Oil Lifter is a lubrication device for the mechanical seal that is the heart of the submersible pump.* The Oil Lifter stabilizes and enhances mechanical seal lubrication and cooling effect. * Offers stable sealing performances even if the oil level drops. Facilitates periodic inspection.

Guide vaneOil suction port

This design features an independent pump casing built separately from the oil casing which incorporates the mechanical seal. An intermediate chamber, opened to the outside, is installed between the pump casing and the oil casing.

Thanks to this configuration, the mechanical seal is exposed to the static (submergence) pressure only without the pumping pressure operating on it. This prevents the mechanical seal from premature wear under the high-head pumping condition.

Oil Chamber

Mechanical Seal

Labyrinth Ring

Flow Path

Specification Table

The entirely cylindrical drive channel maintains the motor cooling efficiency adequately high even during operations at a low water level. Also, with the discharge port on its top (sketch), the pump can be installed in a narrow place.

Enables the pump to be lifted up/down without disconnecting it from piping and stably installed true to the center of gravity.

The dual impeller (photo) remarkably increases the power of pumping up water from a great depth.

Part of pumped fluid flows in between the outer cover and the motor housing before discharge and thus cools the motor on its way. This allows the pump to operate long and continuously even if it is exposed to the air.

Cylindrical channel (LH, LH-W)

Center-flange construction (LH, LH-W)

Dual impeller (LH-W)

Forced motor cooling (GSZ-4)

2

ApplicationSeriesDischarge bore (mm)Output (kW)Poles (p)Center-flange specsCylindrical channelDual impellerForced motor cooling

LH100~20015~110

2

LH-W50~1003.0~30

2

High-head & High-volumeGSZ-4

150~25037~75

4

Deep wellSubmersible pumps

Standard equipment

◎

◎

◎◎◎

◎ ◎ (Except 3.0kW)

LH

Performance Curves Specifications 50/60Hz

Dimensions

JIS 10/20K Flange

D

B

W1

JIS 10/20K FlangeJIS 10K Flange

ddJIS 10K Flange

d

D

B

W1

C.W.L.C.W.L.

Major Standard Specifications

ItemDischarge size

mm 100 150 200

Pumpingfluid

Pump

Motor

Discharge connection

Type of fluid

Liquid temperature

Compo-nents

Materials

Type, poles

Insulation

Phase / Voltage

Motor protector(built-in)

Leakage sensor(built-in)Lubricant

Materials

Impeller

Shaft seal

BearingImpeller

Casing

Mouth ringShaft seal

FrameShaftCable

Rain water, Ground water, Sand laden water0~40˚CClosedDouble mechanical sealWater pressure enduranceShielded ball bearingChromium iron castingGray iron casting,Ductile iron castingChromium iron castingSilicon carbideDry-type submersibleinduction motor, 2 polesClass B (15~22kW), Class F (30~110kW)Three-phase /220V, 380V, 400V, 415V,440V, 460V, 525V, 575VCircle thermal protector(15~22kW), Miniatureprotector (30kW or over)Electrode type (55kW or over)Turbine oil (ISO VG32)Gray iron casting420 stainless steelChloroprene rubberJIS10K FlangeJIS20K Flange

• Cabtyre cable 1 pc (2 pcs for 90 kW version or up)• Discharge pipe 1 pc (on JIS10K flange specs; accompanying 422, 430, 615, 619, 622, 637, 645, 837, 845, 855, 875, 890 and 8110 types)• Discharge pipe 1 pc (on JIS20K flange specs; accompanying 675, 690 and 6110 types)• Electrode-type leakage sensor 1 set (55 kW or over)• Cathodic protection anodes

• Extended cable• Special paint

Standard Accessories

Optional Specifications

100100150150150150150150150150200200200200200200

Discharge Boremm Model

LH422LH430LH615LH619LH622LH637LH645LH675LH690LH6110LH837LH845LH855LH875LH890LH8110

Motor OutputkW

223015192237457590

1103745557590

110

Phase

Three-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phaseThree-phase

Total Headm

6070/75

3530358080

120120160353550607090

Capacitym3/min

1.01.01.52.02.01.01.41.52.02.03.64.54.04.54.54.5

StartingMethod

D.O.L.Star-Delta

D.O.L.D.O.L.D.O.L.

Star-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-DeltaStar-Delta

3503552133503604955108501100120049551081085011501250

Dry Weight kgs

10101010101010102020101010102020

Length ofCabtyre Cable

m

•Dry weight of the pump excluding cable.

For deep-well pre-dewatering or high-head dewatering in civil engineering and construction works.

Unit :mm C.W.L.: Continuous Running Water Level

LH422LH430LH615LH619LH622LH637LH645LH675LH690LH6110LH837LH845LH855LH875LH890LH8110

d100100150150150150150150150150200200200200200200

B1352135210141423142314481448167617871787148814881716171617871787

D420420330420420530530563592592530530563563592592

W1250250185270270180180200200200180180200200200200

Model

15kW 37~75kW19~30kW 90~110kW

3 4

W1

C.W.L.

B

W1

B

D

C.W.L.

D

15kW~37kW

0 1 2 3 4 5 6 7

200

150

50

100

0

LH6110

LH690LH675

LH8110

LH645

LH890LH875LH855

LH845

50Hz

Capacity(m3/min)

Tota

l hea

d(m

)

45kW~110kW

S.S. Revolution 3000min-1

0 1 2 3 4 5 6 7Capacity(m3/min)

100

50

0

Tota

l hea

d(m

)

60Hz LH430

LH637

LH422

LH619

LH622

LH837LH615

0 1 2 3 4 5 6 7

100

50

0

Capacity(m3/min)

Tota

l hea

d(m

)

50Hz

LH430

LH637

LH837

LH422

LH619

LH622

LH615

S.S. Revolution 3000min-1 S.S. Revolution 3600min-1

0 1 2 3 4 5 6 7

200

150

50

100

0

LH6110LH690LH675

LH8110

LH645

LH890LH875

LH855LH845

60Hz

Capacity(m3/min)

Tota

l hea

d(m

)S.S. Revolution 3600min-1

LH-W

5

Performance Curves

Major Standard Specifications

Standard Accessories

Dimensions

Unit :mmModel d

50508080100

B630750102412351375

D185244270330365

W1200170200300300

LH23.0WLH25.5WLH311WLH322WLH430W

C.W.L.: Continuous Running Water Level

W1

B

C.W.L.

dJIS 10/20K Flange

The slim pumps that can be installed in a smaller pipe. Ideal for deep-well pre-dewatering. A dual impeller has greatly increased the pumping power to realize high-head specifications. (Model LH33.0 is a single impeller pump.)

LH23.0W

• One 20m Long Power Cable• Discharge Connection (Thread Connection or Flange)• Galvanized Corrosion Protection Anodes (except 3kW

models)

B

W1

D

2"(3")d

C.W.L.

Single-Stage ModelLH33.0 80 645 185 150

Specifications 50/60HzModel Motor Output

(kW) Phase Total Head(m)

Capacity(m3/min.)

DischargeBore(mm)

Length ofCable (m)

StartingMethod

Dry Weight(kg)

•Dry weight of the pump excluding cable.

Single-Stage Model

50

80

100

80

LH23.0WLH25.5WLH311WLH322WLH430W

LH33.0

35.5112230

3.0

32 / 3546

59 / 6182

102 / 105

12 / 15

0.20.30.50.60.7

0.5

DOL

Star-Delta

DOL

4680

130304324

20

2042

3-phase

3-phase

Pump

PumpingLiquid

Motor

Compo-nents

Item Outlet Bore(mm) 50 80Type of LiquidLiquid Temperature

Rain Water, Ground Water, Sand Laden Water0~40˚CLH23.0W & LH33.0 - Semi-openOther Models - ClosedDouble Mechanical SealWater Pressure EnduranceDouble Shielded Pre-Lubricated Ball BearingChromium Iron Casting

LH23.0W & LH33.0 - Ductile Iron Casting Other Models - Gray Iron Casting

Silcon CarbideDry Type, Induction Motor, 2-poleLH23.0W, LH33.0, LH430W - class FLH25.5W, LH311W, LH322W - class B3-phase, 220V, 380V, 400V, 415V, 440V, 460V, 525V, 575VCircle Thermal Protector (excl. LH430W)LH430W - Miniature Thermal ProtectorTurbine Oil ISO VG32Gray Iron Casting420 stainless SteelChloroprene Rubber

LH23.0W - Threaded Hose Connection (BSPT or NPT )LH25.5W, LH311W - JIS 10K FlangeLH322W, LH430W - JIS 20K Flange

Impeller

Shaft Seal

BearingImpeller

Pump Casing

Shaft Seal

Material

Type, poles

Class of Insulation

Phase / Voltage

Motor Protector (Built in)

Lubricant

MaterialFrameShaftCable

Discharge Connection

When ordering, please specify BSPT or NPT.

100

Optional Accessories• Extended Cable• Cathodic Protection Plates (3.0kW models only)• Centered Discharge (JIS 10K) Flange (3.0kW models

only)• Special Paint

D

( ):LH33.0 Version

GSZ-4

A1A

DH

W1

BB1

C.W.L.

d

6

Performance Curves

Major Standard Specifications

ItemDischarge size

mm 150 200 250

Pumpingfluid

Pump

Motor

Discharge connection

Type of fluid

Liquid temperature

Compo-nents

Materials

Type, poles

Insulation

Phase / Voltage

Motor protector(built-in)Lubricant

Materials

ImpellerShaft sealBearing

Impeller

CasingSuction coverShaft seal

FrameShaftCable

Rain water, Ground water, Sand laden water0~40˚CClosedDouble mechanical sealShielded ball bearingChromium iron casting,Stainless steel casting(GSZ5-37-4H & GSZ-75-4)Gray iron castingGray iron castingSilicon carbideDry-type submersibleinduction motor, 4 polesClass F (37~45kW)Class E (55~75kW)Three-phase /220V, 380V, 400V, 415V,440V, 460V, 525V, 575VMiniature protectorTurbine oil (ISO VG32)Gray iron casting420 stainless steelChloroprene rubberJIS10K Flange

• Cabtyre cable 2 pc• Discharge pipe (JIS10K Flange) 1pc

• Extended cable• Special paint

Standard Accessories

Optional Specifications

Equipped with a 4-pole motor, the pumps in this series display their true virtues where a massive amount of watermust be drained in a very short period of time.

Specifications 50/60Hz

Dimensions

Length ofCabtyreCable

m

DischargeBoremm

150200200250250

Model

GSZ5-37-4HGSZ5-37-4GSZ4-45-4GSZ-55-4GSZ-75-4

MotorOutput

kW

3737455575

Phase

Three-phaseThree-phaseThree-phaseThree-phaseThree-phase

TotalHead

m

4535353540

Capacitym3/min

2.04.05.06.06.0

StartingMethod

Star-DeltaStar-DeltaStar-DeltaStar-DeltaStar-Delta

DryWeight

kgs

62560577011501200

1010101010

•Dry weight of the pump excluding cable.

Unit :mmModel d

150200200250250

A900915915

10501050

A1760750750850850

B14001403140315001500

B1520550600655655

D700660660708708

H15531583159117331733

W1440480460510510

GSZ5-37-4HGSZ5-37-4GSZ4-45-4GSZ-55-4GSZ-75-4

C.W.L.: Continuous Running Water Level

S.S. Revolution 1500min-1 S.S. Revolution 1800min-1

Tota

l hea

d(m

)

Capacity (m3/min)

Tota

l hea

d(m

)

Capacity (m3/min)0 5 10 15 0 5 10 15

0

10

20

30

40

50

6065

0

10

20

30

40

50

6065

GSZ-75-4GSZ5-37-4

GSZ5-37-4H

GSZ-55-4

GSZ4-45-4

GSZ-75-4

GSZ5-37-4

GSZ5-37-4H

GSZ-55-4

GSZ4-45-4

S.S. Revolution 3000min-1

LH430WLH322W

LH311WLH25.5W

0 0.2 0.4 0.6 0.8 1.0 1.2 1.40

20

40

60

80

100

120

130

Tota

l hea

d(m

)

Capacity (m3/min)

LH23.0W

LH33.0

S.S. Revolution 3600min-1

LH430WLH322W

LH311WLH25.5W

0 0.2 0.4 0.6 0.8 1.0 1.2 1.40

20

40

60

80

100

120

130

Tota

l hea

d(m

)

Capacity (m3/min)

LH23.0WLH33.0

Printed in Japan CAT. IB105-G HB-E-D-Q

We reserve the right to change the specifications and designs for improvement without prior notice.

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