Manual GIW

A KSB Company.GIW Industries Inc. • 5000 Wrightsboro Road, Grovetown • GA 30813-9750 USA • Telephone (706) 863-1011 • Fax (706) 860-5897

www.giwindustries.com

GIW LSA Slurry Pump

1/01

When you need the best, put GIW to the test!

If you have questions regarding this product improvement, please contact the

GIW marketing department at ([email protected]).

Premium design hard iron pumps

for long wear life pumping severe

slurries.

Click here for more information.

“Section 9 - LSA Series Slurry Pump”

6/2003 Page

OVERVIEW

LSA Slurry Pumps are designed for severe duties with operating

flows from 100 gallons per minute (25 cubic meters per hour) to

more than 60,000 gpm (14,000 m3/hr).

These high performance, low maintenance slurry pumps are used

in applications such as ore transport, mill discharge, cyclone feed,

tailings, plant process and dredging. A wide range of sizes is

available to handle virtually any slurry transport application.

The LSA’s rugged design features a shell, impeller and liner of

Gasite® white iron. GIW’s Gasite white iron alloys are recognized

worldwide for superior abrasion resistance.

LSA Series Slurry Pumps are constructed with a single wall,

heavy section, and a hard metal wet end for maximum reliability

and ease of maintenance.

The LSA features a split cartridge bearing assembly with spherical

roller bearings and a separate steep angle thrust bearing. Different

hydraulic designs of the impellers and shells are available to

optimize performance for any system and duty requirement.

The standard LSA “S” range consists of single wall, hard metal

pumps. Custom produced (CP) and custom engineered (CE)

configurations are available upon request. These include high

pressure and vertical designs, elastomer linings (vulcanized rubber

or polyurethane), and discharge sizes up to 44 inch (1100 mm).

SHELL HYDRAULIC SHAPESLSA Pumps feature both Annular (A) and Semi-Volute (C) hydraulic

shapes. These may be selected to minimize wear due to

recirculation at the duty point and to optimize efficiency.

IMPELLER TYPESRadial Vane (RV) or conventional warped vane (ME) can be

selected to optimize parameters such as solids passage, suction

performance and efficiency.

WET END CONSTRUCTIONLSA Pumps are low speed, horizontal, end suction pumps with

heavy section thickness. Three and four vane impeller designs

provide optimum solids passage, efficiency and wear

characteristics over a broad operating range.

1


Page 6/2003

The pump features all metal, hydraulic wet end components for long,

predictable wear life. The hydraulic wet end normally consists of a

single shell, an impeller and a suction liner. The suction plate and

liner can be removed without disturbing the discharge piping. The

metal pump design does not require a separate outer shell.

LSA Standard Material Combinations**

2

**Other material options available upon request.

Several wet end constructions are offered. The LSA shell is normally

furnished with an integral hub liner. This is designated as

construction “H”.

The WSO and WBC constructions feature a special wet end fastener

arrangement, which offer higher working pressures and greater

resistance to damage by water hammer.

The TBC and WBC constructions feature a through bolt fastener

arrangement to further increase working pressure ratings.

WSO, WBC and TBC arrangements are particularly favored for

multistage slurry transport systems.

The LSA HP features a shell reinforced with ribs and a plate to

achieve high pressure ratings.

HARD METAL, SEMI-VOLUTE, SINGLE WALL SHELLThe standard wet end configuration for the LSA is a hard metal,

semi-volute, single wall shell. All major wear parts, including the

impeller and suction liner, are cast of high chromium or Gasite®

nickel-chromium white iron.

The CH/ME (semi-volute shell, warped vane impeller) hydraulic

design is standard for the LSA S group and represents the most

common and versatile hydraulic configuration for good wear and

efficiency over a range of operating duties.

Part Name Standard Material

Shell Gasite WD28G

Impeller Gasite WD28G

Suction Plate Fab Steel, Ductile Iron

Suction Liner Gasite 18G

Pedestal Fab Steel

Shaft 4150 Steel

Stuffing Box Gray Iron 35C

Shaft Sleeve Carbide Coated Steel

Gland Gray Iron 35C

Lantern Ring Teflon

Bearing Housing Gray Iron 35C


6/2003 Page

Other custom produced hydraulics, including different shell

shapes and impeller vane designs, are available to address wear

caused by unusual operating conditions.

WET END MATERIALSLSA Series Slurry Pumps are available in a variety of materials.

GIW’s hard metal white iron alloys for most pumping conditions

are Gasite 18G, Gasite 27G and Gasite WD28G. Other specialty

white irons are available. These include Gasite WD29G for

handling large rocks and Gasite 38G for extremely abrasive,

low stress conditions. Polyurethane and other elastomers are

also available as liners.

For more information or selection recommendations, call your

GIW representative.

Materials specifications are located after ”Section 2”.

BHN is the Brinell Hardness Number, and Rc is the Rockwell

“C” scale for hardness.

GASITE ® WD28G

The standard material for LSA “S” metal wear parts is a

proprietary high chromium white iron called Gasite WD28G. It

exceeds the requirements of ASTM specification A 532-93a,

Class III, Type A.

Gasite WD28G offers a material hardness of 600 BHN (58 Rc)

and tensile strength of 85-115 ksi. This high chromium material

offers excellent wear life along with resistance to moderate

chemical corrosion when applied in slurries with pH as low as

five.

The microstructure of Gasite WD28G is chromium carbides in a

chromium rich matrix of tempered martensite and some

austenite.

GASITE ® 18G

LSA metal wear parts are available in Gasite 18G, an abrasion

resistant, chromium-molybdenum white iron. Gasite 18G is a

proprietary material that conforms in chemistry and physical

properties to ASTM specification A 532-93a, Class I, Type D.

3


Page 6/2003

Gasite 18G offers 650 BHN (59 Rc) and a tensile strength of 80-

120 KSI. This premium material is either heat or cryogenically treated

to increase its hardness, for maximum wear resistance.

The microstructure of Gasite 18G consists of eutectic and secondary

carbides in a mostly martensitic matrix.

GASITE ® 27G

Gasite 27G, an abrasion resistant, high chromium white iron, is well

suited for the manufacture of wear parts in applications that require

abrasion resistance and some degree of corrosion and heat

resistance.

Gasite 27G is a proprietary metal that conforms in chemistry and

physical properties to ASTM specification A532-93a, Class III, Type

A. It offers a material hardness of 600 BHN (56.5 Rc) and a tensile

strength of 80-110 ksi.

POLYURETHANE

Polyurethane is a two part elastomer resin that has higher hardness

and strength than most rubbers. It is the standard material for LSA

elastomer lined impellers. Polyurethane exhibits excellent resistance

as an abrasion resistant material. It has been used mainly in

applications where particles are smaller than 0.04 inch (one

millimeter) or 16 mesh.

4

SHAFT SEAL DESIGN

The shaft seal design of slurry pumps is determined by the

presence of solids and the availability of purge water. The two

basic configurations for the LSA are the stuffing box and the

mechanical seal.

STUFFING BOXThe LSA stuffing box is designed to be operated with an external

water flush to prevent the solids from entering the sealing area where

they would cause premature damage to the shaft sleeve and

premature packing wear. This fluid also lubricates and cools the

packing.

Flush water is introduced forward of all packing to ensure only clear

water at the sealing surface. If flush water usage must be reduced,

the Low Flow, or Type KE, Stuffing Box is available as an option.

The Low Flow Stuffing Box features two rings of packing forward of

the seal water ring to limit seal water usage.


6/2003 Page

Seal water should be available at 10 psi (0.7 bar) above maximum

pump discharge pressure and in the flow rates shown below:

In operation, stuffing box purge water should be regulated to

maintain a minimum of 10 psi (.7 bar) above discharge pressure.

The amount of flow from the box should be adjusted to the mini-

mum amount required to provide cooling. This often results in

lower flow rates than shown, which are maximum requirements

for seated packing.

Flow control of stuffing boxes is not recommended. It may result

in abnormally high sealing pressures and lead to jamming of the

packing, excessive heat and wear.

The standard stuffing box is constructed of gray iron. The standard

shaft sleeve is constructed of steel with a flame sprayed, nickel-

chromium, carbide coating.

MECHANICAL SEALS

Although mechanical seals require special selection, operation

and maintenance, they are becoming more common in slurry

applications where zero dilution of the product is required, where

no service water is available and where product leakages are not

tolerated for safety or environmental reasons.

Mechanical seals offer pump operation without the need for seal

water. This removes the potential for product dilution or leakage.

Many mechanical seals operate without an additional cooling

medium, although some designs may require an external fluid

source.

5

2-15/16 12 (0 .47) 3 .0

3-15/16 20 (4.5) 4 .0

4-17/16 25 (5/7) 5 .0

5-7 /16 30 (6.8) 6 .0

6-7 /16 55 (2.16) 11.0

7-3 /16 55 (2.16) 11.0

9 85 (3 .35) N /A

S tuffing B ox M ax im um S eal W ater R equirem ents in gpm (m 3/hr)

N om ina l

S haft S iz e S tandard F orw ard

F lus h

(0 .43)

(0 .43)

N /A

M a x im u m S e a l W a te r R e q u ire m e n ts

(0 .12)

(0 .91)

(1 .1)

(1 .3)

S tu ffing B ox Ty pe

K E Low F low


Page 6/20036

DRIVE ARRANGEMENTSThe standard drive arrangements for LSA Slurry Pumps are

overhead and side mounted V-belt. Custom configurations include

direct coupled, and gear reducer drives.

Pumps with discharge sizes of 16 inches (400 millimeters) and below

often use V-belt drives. Pumps with discharge sizes of 18 inches

(450 millimeters) or larger or that require more than 400 horsepower

usually use gear reducers.

RECOMMENDED SPARE PARTSBecause of the wear caused by the slurry, many of the wet end

components of the pump may require replacement during normal

maintenance. Inspection or overhaul of mechanical components

may also lead to the replacement of other parts.

The following spare parts are recommended for normal maintenance

and inspection. Quantities depend on the severity of the slurry duty

and the number of units operating. Maintenance practices may

favor keeping fully built subassemblies or complete pumps on hand

in some cases.

Previous experience in similar duties often provides the best

experience. For specific recommendations, call your GIW

representative.

Wet End Stuffing Box Bearing Assembly

Impeller Shaft Sleeve Bearings and adapters

Shell Lantern ring V-Ring seals

Liner Packing Gasket kit

Gasket Kit Gasket Kit Bearing Oil

SPECIFICATIONS FOR LSA S SLURRY PUMPS

BEARINGS

Two double row, spherical roller bearings carry the drive and impeller

end radial loads. A separate spherical roller thrust bearing carries

the hydraulic axial thrust without any requirement for thrust

compensating clearing vanes on the impeller.

The radial bearings are fixed to the shaft with tapered sleeves and

locknuts. The thrust bearing is preloaded with springs to provide

constant minimum thrust load required by this type bearing. The

bearing housing is split for ease of maintenance and assembly.


6/2003 Page

For pumps with mechanical seals, an optional, limited end float

arrangement is available. It replaces the drive end spherical radial

bearing with a radial, taper roller bearing. In this case, the forward

movement can be reduced to less that 0.010 inch (0.25 millimeter).

LUBRICATIONLSA bearing assemblies are designed for use with oil. This

provides the lubrication and cooling required for long life of the

the large spherical roller bearings. The separate thrust bearing

has lubrication requirements that can not be met with grease.

Factory assembled units are filled with GIW Blue 150 Synthetic

oil. This proprietary lubricant provides corrosion protection during

shipping and storage as well as the the film strength required for

initial start up of the pump. Available as a service part, GIW Blue

extends the change interval to double that of conventional mineral

oils to minimize routine maintenance downtime. Contact a GIW

representative for details.

Certain larger bearing assemblies are availalbe with the GIW Oil

Recirculation Kit. This optional system removes excess oil from

the thrust bearing area for lower oil temperatures under extreme

operating conditions.

BUILT-IN BEARING ISOLATOR SYSTEM

Standard LSA cartridge and pillowblock bearing assemblies

feature a Built-in Bearing Isolator System. Designed by GIW,

this is a labyrinth seal built into the end cover plus a V-ring seal

and protective flinger. This system extends the life of the bearing

assemblies by preventing contaminants from entering through

the seal area. It also reduces oil leakage and lowers operating

temperatures.

With this system, the breather is eliminated since the labyrinth

allows the bearing assembly to balance internal pressures.

The system replaces the grease purged, dual lip seal

arrangement. It is featured on all standard 2-15/16 through 9”

LSA housings produced after Aug. 1, 1996.

IMPELLER

Standard impellers are of four vane, double shrouded, warped

blade design. Three vane impellers for larger sphere passage

are also available.

Impellers are threaded directly to the shaft without separate

adapters. The impeller is sealed against the shaft sleeve using

double gaskets.7


Page 6/2003

INSPECTION

Pump inspection and routine maintenance of the impeller and suction

may be accomplished without removing or disturbing the discharge

pipe to minimize pump down time.

MECHANICAL END

LSA Series Slurry Pumps feature eight basic bearing assembly sizes

on six pedestals with rated power up to 6,000 horsepower (4500

kilowatts). LSA’s also feature a high degree of interchangeability.

For example,the five wet end sizes of the S1 group are handled by

three bearing assemblies and two pedestals. This allows

standardization of plant mechanical components, which simplifies

maintenance programs and enables changes to vary operating

conditions at minimal cost.

The bearing assembly and pedestal are designed to accomodate a

range of pump sizes. For example, the LSA 25 pedestal can be

used for the LSA 4X6-25 through the LSA 12x12-32 pump. This

results in an allowable flow range of 250 to 7,500 gallons per minute

(50 to 1.700 cubic meters per hour).

PEDESTAL

The pedestal is a steel fabrication that supports the bearing assembly,

shaft seal, pump wet end and, where applicable, the overhead motor

mount.

The shell and bearing assembly are aligned on machined fits in the

pedestal.

SHELL

LSA Series Slurry Pumps feature a one piece, heavy walled shell

cast of white iron. It is designed to deliver maximum wear life. It is

offered with an integral back liner, or an optional separate wear part.

SUCTION LINER

LSA Series Slurry Pumps use a two piece suction liner arrangement

with a steel or ductile iron plate and separate white iron suction liner.

To increase wear life, the liner can be rotated at routine maintenance

intervals. The liner is sealed to the shell with a tapered, Neoprene

gasket.

8

Product Introduction LSA S

Series Overview

LSA Series Slurry Pumps are designed for se-vere duties with operating flows from 100-60,000

gpm (20-14,000 m3/h). Total dynamic head isto 300 ft. (90m) per stage and power rating is

up to 4,000 hp (3.000kW). Custom produced

(CP) and custom engineered (CE) pumps areavailable when the LSA S Range pumps do not

meet the required specifications.

Fields of Application

The LSA S slurry pump is a severe-duty slurrypump for highly abrasive slurries. Applications

include run-of mine material transfer, grindingcircuit recirculation, process pumping and

tailings disposal for mining, dredging and other

industrial operations.2-26 in (50-650mm) Discharge

DesignLSA S slurry pumps are low-speed, horizontal,

end suction, modified volute casing pumps. TheLSA S’s accept three or four vane impeller designs

for optimum solids passage, suction performance,

efficiency and wear characteristics over a broadoperating range. The simple, single wall

construction and heavy section, hard metal wetend combined with the cartridge bearing assembly

provides maximum reliability and ease of

maintenance.

Plug Type

D......2.0

F.......3.5S

G......2C4.5

H......2C5.0

J.......6.5

K......7.75

Seal Type

F.......Packing, Forward Flush

K.......Packing. Low Flow

Shaft Size

1.......2-15/16 (75 mm)

2.......3-5/16 (100 mm)

3.......4-7/16 (110 mm)

4.......5-7/16 (140 mm)

5.......6-7/16 (160 mm)

6.......7-3/16 (180 mm)

9.......9 (230 mm)

Impeller Hydraulic Type

RV Radial Vane

ME Conventional Warped Vane

Shell Hydraulic Type

A Annular

C Semi-Volute

Designation

LSA 8x10-32.4 G F C/3 ME.1 H

Pump Type

Discharge Size

Suction Size

Impeller Diameter

Shaft Size

Plug Type

Seal Type

Shell Hydraulic Type

Number of Impeller Vanes

Impeller HydraulicType

Hydraulic Number (If more than one)

Construction Type

A KSB Company.

Normal temperature limit is 150º F (65ºC).

Consult the factory for materials and configu-

rations for temperatures above 150º F.

LSA S SpecificationsCapacities (Qmax.) 100-60,000 gpm

20-14,000 m3hHeads (H max.) 300 ft

90 m

Discharge Positions

Rotation direction is clockwise from the drive

end. A vertical discharge is standard.

Materials

*Wet end also available in M011A - Gasite 4G

*

A KSB Company.

P a r t N o . I t e mM a t e r i a l C o d e

M O 1 0 A S t a n d a r d

1 0 1 S h e l l G a s i t e W D 2 8 G

2 3 0 I m p e l l e r G a s i t e W D 2 8 G

1 6 - 1 S u c t i o n P l a t e F a b S t e e l / D u c t i l e I r o n

1 3 - 1 9 S u c t i o n L i n e r G a s i t e W D 2 8 G

3 3 2 P e d e s t a l F a b S t e e l

2 1 0 S h a f t 4 1 5 0 S t e e l

4 5 1 S t u f f i n g B o x G r e y I r o n 4 0 C

5 4 2 S h a f t S l e e v e C a r b i d e C o a t e d S t e e l

4 5 2 G l a n d D u c t i l e I r o n 6 5 D

4 5 8 L a n t e r n R i n g T e f l o n

3 5 0 B e a r i n g H o u s i n g G r e y I r o n 3 5 C

Assembly

Number

Discharge

Position

Intervals

Vane

Number

& Type

in mm psi bar in mm Degrees

0517x 2x3-21 50x80-530 215 14.82 1.0x1.5 25x40 45 4RV

0518x 3x4-21 80x100-530 215 14.82 1.0X1.5 25X40 45 4RV

0519x 4X6-21 100x150-530 167 11.51 2.5X2.8 63X71 45 4RV

0500x 4X6-25 100x150-635 167 11.51 1.2x3.5 32X89 22.5 4RV

0516x 4X6-25 100x150-635 167 11.51 1.5x2.3 39x58 22.5 4ME

0501x 6x8-25 150x200-635 167 11.51 2.8x3.6 71x92 22.5 4ME

0521x 8x10-25 200x250-635 167 11.51 2.4x4.9 61x125 22.5 4RV

0502x 8x10-32 200x250-810 155 10.69 3.5x4.7 89x120 22.5 4ME

0503x 8X10-32 200x250-810 155 10.69 4.5x4.7 114x120 22.5 3ME

0504x, 0506x 8x10-32 200x250-810 155 10.69 3.5x4.7 89x120 15 4ME

0505x, 0507x 8x10-32 200x250-810 155 10.69 4.5x4.7 114x120 15 3ME

0522x, 0525x 10x12-32 250x300-810 141 9.72 3.7x6.7 95X171 15 4RV

0508x, 0510x 10x12-36 250x300-910 147 10.14 4.0x6.7 102x171 15 4ME

0509x, 0511x 10x12-36 250x300-910 147 10.14 6.3x6.7 160x171 15 3ME

0514x, 0512x 12x14-36 300x350-910 133 9.17 5.3x8.7 133x222 15 4ME

0513x, 0515x 12x14-36 300x350-910 133 9.17 6.5x8.7 167x222 15 3ME

0527x 16x16-39 400x400-990 110 7.58 5.8x8.2 148x209 15 4ME

0530x, 0532x 16x16-39 400x400-990 110 7.58 4.4x8.7 112x222 45 4ME

0534x, 0536x 16x18-44 400x450-1115 135 9.31 5.5x7.6 141x193 18 4ME

0535x, 0537x 16x18-44 400x450-1115 135 9.31 7.6X8.2 193x208 18 3ME

0538x, 0540x 18x18-44 450x450-1115 125 8.62 6.3x11.6 161x295 18 4ME

0539x, 0541x 18x18-44 450x450-1115 125 8.62 8.8x11.6 225x295 18 3ME

0546x, 0547x 20x20-48 500x500-1220 95 6.55 9.7x11.7 247x298 45 4RV

0548x 20x20-48 500x500-1220 95 6.55 9.7x11.7 247x298 15 4RV

0549x 20x24-48 500x600-1220 85 5.86 6.1x12.8 155x326 15 4ME

0550x 22x24-54 550x600-1370 200 13.79 8.1x13.5 208x343 18 4ME

0551x 26x28-58 650x700-1470 85 5.86 8.6x11.7 218x298 15 4ME

Normal Size

LSA S RANGE PUMP INFORMATION TABLE

Free Passage

Maximum Operating

Pressure

15

50

RP

M5

50

RP

M1

30

0 R

PM

13

00

RP

M1

30

0 R

PM

12

50

RP

M

90

0 R

PM

75

0 R

PM

90

0 R

PM6

75

RP

M

60

0 R

PM

15

50

RP

M

2 X 3

LSA 2

1

3 X 4

LSA 2

1

4 X 6

LSA 2

5

6 X 8

LSA 2

58 X

10 L

SA 25

10 X 1

2 LSA 3

2

12 X 1

4 LSA 3

6

16 X 1

6 LSA 3

9

18 X 1

8 LSA 4

4

20 X 2

4 LSA 4

822 X

24 L

SA 54

26 X 2

8 LSA 5

8

4 X 6

LSA 2

1

CU

BIC

ME

TE

RS

PE

R H

OU

R

GA

LL

ON

S P

ER

MIN

UT

E (

US

)

Sta

nd

ard

LS

A H

ea

d-F

low

Se

lec

tio

n C

ha

rt f

or

Cla

ss

On

e D

uty

(Fo

r u

se

as a

fir

st

gu

ide

on

ly -

Co

nta

ct

a G

IW R

ep

rese

nta

tive

with

yo

ur

sp

ecific

ap

plic

atio

n)

RP

M S

HO

WN

IS

MA

XIM

UM

RE

CO

MM

EN

DE

D F

OR

EA

CH

CL

AS

S O

F D

UT

Y

TOTAL DYNAMIC HEAD (METERS)

TOTAL DYNAMIC HEAD (FEET)

3

0

40

50

60

80

10

0

20

0

30

0

5

00

7

00

1

00

0

20

00

40

00

6

00

0

10

00

0

10

0

20

0

3

00

5

00

70

0

10

00

2

00

0

4

00

0

60

00

1

00

00

20

00

0

4

00

00

6

00

00

30

0

20

0

80

15

0

10

0

60

50

15

40

30

20

10

8 6 5 4

10

00

50

80

0

60

0

50

0

20

40

0

30

0

20

0

10

0

60

40

30

20

A KSB Company.

A KSB Company.GIW Industries Inc. • 5000 Wrightsboro Road, Grovetown • GA 30813-9750 USA • Telephone (706) 863-1011 • Fax (706) 860-5897

www.giwindustries.com

GIW Model LSA S PumpsLow Maintenance, Severe Duty, Abrasion ResistantLow Maintenance, Severe Duty, Abrasion Resistant

Wear Parts

Pump Seal

Impeller is designed for wear-resistant operation in

highly abrasive slurries using GIW’s flow simulation

computer program.

Two aramid gaskets aid in the removal of the

impeller.

Replaceable suction liner facilitates pump internal

inspection and minimizes wear part usage cost.

Liner can be rotated at intervals to increase wear life.

Pump shell is computer designed to optimize wear

and efficiency.

Replaceable wear plate maximizes stuffing box life.

Shaft sleeve with fused carbide hard coating to

maximize packing life.

Mechanical End

Shaft is AISI 4150 steel and straight cut with no

tapers. Multiple material options available.

10

12

1

8

6

6

5

4

3

2

1

Split-cartridge bearing assembly offers ease of

inspection and maintenance.

Accurate impeller clearance adjustments are easily

made with the adjusting screw.

Labyrinth seals protect bearings.

Sight glass and temperature gauge allow monitoring.

Quick Alignment

Rabbet fits machined in the pedestal support the shell

and provide component alignment.

Interchangeability

To optimize wear life and efficiency, various hydraulic

design and material options can be used on the same

mechanical end.

14

11

10

12

9

11

7

7

5

4

2 3

8

14

Spring retainer ring locates the thrust bearing pre-

load springs for correct axial thrust load.

Adapter mounted radial bearings are a heavy duty,

self-aligning, double-row, spherical roller-type

design.

9

13

13

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