Chemical gear pumps

G series

CAT-W 0042-02

Fine ceramic usedin internal gear

The Iwaki G series chemical pump isthe first internal gear pump designedfor chemical process applications, inwhich gears of fine ceramic (SiC andSilicon nitride) are used.Our pump technology, developed overmore than 30 years, has made it pos-sible for Iwaki to equip standardpumps with fine ceramic gears.Without detracting from any of theadvantages of conventional internalgear pumps abrasion resistance,chemical resistance, low-viscositycharacteristics and sealing character-istics have been remarkably improved.In addition to the glandpacking/mechanical seal type (ModelGX), magnetic drive sealless type(Model GM) are available as standardproducts for an expanded range ofuses.The G series is an advanced gearpump, capable of dealing with a widerange of industrial processes whichcontinue to increase in sophistication.

1

Ceramic gear

Metal gearHeat-treated

Hard coated

Corrosionresistance

Thermalresistance

Seizingresistance

Exfoliationresistance

Abrasionresistance

Coefficientof friction

Impactresistance

Ceramic vs stainless steel gear comparison

Type of gear

Chemical gear pumps

Both high viscosity and low vis-cosity liquids can be handledWhen a low-viscosity liquid is handledby a conventional gear pump, "jam-ming" and "seizing" tend to occur. SiCceramic gears do not have this prob-lem even when the pump functions ata high speed. Silicon nitride ceramicgears show stable performance inhandling high viscous liquids, due totheir strength and toughness.

Ability to handle fine slurriesNow that gears and other slidingcomponents including bearings aremade of ceramic, the handling of fineslurries hard and soft will not impairthe longevity of these pumps. Do notspecify GM type for slurry applica-tions.

Magnetic drive type added tostandard lineSuperior anticorrosive materials suchas silicon carbide, silicon nitride, alu-mina ceramic, PTFE, carbon andstainless steel are used in liquid endsso that all sorts of chemical liquidscan be handled. GM is ideal for han-dling chemical liquids which needstrict control on liquid leakage and aircontact.

Improved performance charac-teristicsPerformance has been noticeablyimproved. Ceramic gears make itpossible to reduce spaces betweenparts, therefore outperforming con-ventional metal gear models.

2

Quiet liquid transfer with lesspulsationWithout the pulsation that is com-mon to reciprocating pump and gen-eral use type gear pumps, liquid istransferred quietly and smoothly noagitating or foaming.

High self-priming abilityBecause the suction port is at the topof the pump, the pump chamberremains full when pump stops work-ing. Self-priming is enhanced at re-start.

Constant flow injectionRegardless of the temperaturechange, viscous liquid can be han-dled at accurate flow rate, which cannot do with other pumps. As the out-put is linearly related to rpm, the flowrate is easily controlled by changingspeed.

GX-25

Metal gear pump

0

10

L/min

0.5 MPa

Performance comparisoncurvesIn the graph below, changes in outputat varying discharge pressures arecompared between the G series pumpand a metal gear pump. The graphshows that the G series, whichemploys ceramics gears, is far lesssubject to declining output under highpressure due to its close seal clear-ance in the gear housing.

GM type

GX type

3

Chemical gear pumps

3

A pinion (drive gear) coupled with ashaft supported by two bearingsmeshes with an internal gear (drivengear) whose periphery is supported bya strong bearing. Liquid is transferedby a change in the capacity of thismeshed portion.In the suction process, the gears aredisengaged and a space defined by

the two gears and the casingexpands. The liquid is drawn into thespace by the negative pressure gener-ated.In the discharge process, their teethbegin to mesh and space defined bythe two gears and the casing isreduced to force out the liquid.

Operating principle

IN

OUT OUT

Left or right discharge port selection

Cover Gear housing

O-ring

BearingPinion

Internal gear

Side plate

Gasket

Port housing

Construction

Gear housing

O-ringBearing

Internal gearPinion

Chemical gear pumps

4

GM-15type exploded view

Seal case

Magnet capsule

Drive magnet

341 2

67

812

910

511

Gear housingPort housingCoverSide plateSeal caseInternal gearPinionShaftBearingGasket / O-ringGland packingMechanical seal

Parts Wet end materials123456789

101112

SUS316SUS316SCS14SUS316SCS14 or SUS316SiCSiC or Si3N4SUS630Equi. or SUS316/Cr2O3Carbon or SiCPTFEPTFESUS316/Al2O3/Carbon/PTFESUS316/SiC/SiC/PTFE

413 2

67

8

5

9

10

Gear housingPort housingCoverSide plateSeal caseInternal gearPinionMagnet capsuleBearingGasket / O-ring

Parts Wet end materials123456789

10

SUS316SUS316SCS14SUS316SUS316/SUS304SiCSiCSUS329J1/SUS316CarbonPTFE

GX type

GM type

Construction / Wetend material

5

Identification codes

1 2 73 4 6 8 9 105

1. Pump type XM

2. Pump size 1215

2532

: 12.8mL/rev: 25.0mL/rev

7. Motor output 0204

0715

: 0.75kW: 1.5kW

2237

: 2.2kW: 3.7kW

6. Shaft seal GWMCO

8. Motor type MSF

G3G5H3H5

NN3N5N6X*2

: 4P motor: 6P motor: Inverter motor: Geared motor (Reduction ratio 1/3) GM-LJ: Geared motor (Reduction ratio 1/5) GM-LJ: Inverter geared motor (Reduction ratio 1/3) GM-LJZ: Inverter geared motor (Reduction ratio 1/5) GM-LJZ: Variable speed motor NRXM: Variable speed motor (Reduction ratio 1/3) NRXM: Variable speed motor (Reduction ratio 1/5) NRXM: Variable speed motor (Reduction ratio 1/6) NRXM: Other motors

10. Special specifications *2

JT

JTDTDD

S

: Equipped with heat jacket: Equipped with torque limiter: Equipped with heat jacket and torque limiter: Tandem mechanical seal type: Double mechanical seal type: Other special specifications

9. Motor specifications

BlankABC

: TEFC, indoor type: Increased safety, outdoor type: Explosion-proof, outdoor type: TEFC, outdoor type

3. Housing material S X*2 : Other materials

4. Gear material*1 K N : Si3N4/SiC X*2 : Other materials

5. Bearing material C

: Gland packing or mechanical seal: Magnetic drive

: 1.0mL/rev: 3.3mL/rev

: 0.2kW: 0.4kW

: Gland packing seal: Gland packing seal (Water injection type): Mechanical seal (Carbon / Al2O3): Mechanical seal (SiC / SiC): Magnetic drive (GM type)

: Stainless steel

: SiC/SiC

: Carbon K : SiC

*1. Pinion/Internal gear *2. Special specifications

GX-12

Model Discharge per revolutionmL/rev

Max. speedrpm

Max. discharge pressureMPa

Temp. range˚C

Viscosity rangemPa•s

VacuumKPa

ConnectionsIN OUT

GX-15GX-25GX-32GM-12GM-15GM-25GM-32

1.03.312.825.01.03.312.825.0

1800

1.0

0.7

0 - 150

0 - 80

0.5 - 10,000

0.5 - 100

5.3

Rc1/2Rc1/2Rc1

Rc11/4Rc1/2Rc1/2Rc1

Rc11/4

Rc3/8Rc3/8Rc3/4Rc1

Rc3/8Rc3/8Rc3/4Rc1

Specifications

*1. These are maximum values, which vary depending on motor speed and liquid viscosity.*2. Motor speed and motor output suited to the viscosity of your liquid should be selected.*3. These are values with clear water at 25˚C.

*1 *2 *3

Standard pumps selection table

GX-12

Model Viscosity rangemPa•s

Max. pressure

MPaMax. flow rate

L/min

Max. pressure

MPaMax. flow rate

L/min

Pump specifications 50/60Hz Motor

GM-12

0.5 viscosity<11 viscosity<9

9 viscosity<200200 viscosity<1000

1000 viscosity<30003000 viscosity 10000

0.5 viscosity<1

0.3 / 0.360.47 / 0.57

1.0 / 1.0

0.7 / 0.7

0.3 / 0.36

1.4 / 1.7

0.9 / 1.10.5 / 0.60.3 / 0.36

4P, 0.2kW

6P, 0.2kW4P, 0.4kW, 1/34P, 0.4kW, 1/5

GX-15

1 viscosity<99 viscosity 1000.5 viscosity<11 viscosity<9

9 viscosity<200200 viscosity<1000

1000 viscosity<30003000 viscosity 10000

0.47 / 0.570.7 / 0.7

0.54 / 0.650.7 / 0.7

1.0 / 1.0

0.7 / 0.7

1.4 / 1.7

4.7 / 5.6

3.0 / 3.71.7 / 2.01.0 / 1.2

4P, 0.2kW

4P, 0.2kW

4P, 0.4kW

GM-15 0.5 viscosity<11 viscosity<30

30 viscosity 100

0.54 / 0.65

0.7 / 0.74.7 / 5.6

4P, 0.2kW

4P, 0.4kW

6P, 0.4kW4P, 0.4kW, 1/34P, 0.4kW, 1/5

GX-25

Model Viscosity rangemPa•s

Pump specifications 50/60Hz Motor

GM-25

0.5 viscosity<99 viscosity<200

200 viscosity<10001000 viscosity<30003000 viscosity 10000

0.5 viscosity<30

0.7 / 0.7

1.0 / 1.0

0.7 / 0.7

18.0 / 21.8

11.8 / 14.26.4 / 7.73.8 / 4.6

4P, 0.75kW4P, 1.5kW6P, 1.5kW

4P, 0.75kW, 1/34P, 0.75kW, 1/5

4P, 0.75kW

GX-3230 viscosity 1000.5 viscosity<99 viscosity<100

100 viscosity<200200 viscosity<500

500 viscosity<10001000 viscosity<30003000 viscosity 10000

0.7 / 0.7

0.7 / 0.7

1.0 / 1.0

0.7 / 0.7

18.0 / 21.8

35.2 / 42.5

23.0 / 27.7

12.5 / 15.0

7.5 / 9.0

4P, 1.5kW

4P, 2.2kW

4P, 3.7kW6P, 2.2kW

GM-32 0.5 viscosity<3030 viscosity 100

0.7 / 0.7 35.2 / 42.5 4P, 2.2kW4P, 3.7kW

4P, 1.5kW, 1/3

4P, 1.5kW, 1/5

The recommended gear materials are K(SiC/SiC) for a viscosity below 200mPa•s and N(Si3N4/SiC) for above 200mPa•s.For handling liquids containing slurry, sticky liquids, liquids that harden easily, etc. , select a model with a torque limiter. Please ask us for information on pumps with torque limiters.

Chemical gear pumps

6

Viscosity (mPa•s)

Revolution (rpm)

Ou

tpu

t (L

/min

)

Performance chart

Viscosity-leakage coefficient graph

The chart on the left shows output at a discharge pressure of 0MPa. The output changes in proportion to rpm, but rpm should be reduced when pumping viscous liquid.Knowing required output and viscosity, the proper pump/motor rpm can be selected as in the following example.

For slurriesFor soft slurries, reduce rpm by 75%. For hard slurries, reduce rpm by 50%. In principle, only slurries of less than 10 m in diameter can be handled. GM type pumps can not handle slurries.

When discharge pressure risesThe lower the viscosity, as discharge pressure rises, the lower the output will be. You can estimate the actual output, in case of a change in viscosity or discharge pressure, from the following formula. (See note below).

00.5 1 100050010050105

Viscosity (mPa•s)

Co

effi

cien

t o

f le

akag

e

(L/

min

)/(M

Pa)

5

10

15

20

25

STEP –

STEP –

STEP –

STEP –

Extend the intersected point to the left horizontally until intersecting the first pump line (GX/M-25). This point specifies pump.

Draw a downward line from to specify motor rpm .

Mark the value of your viscosity (500mPa•s) on the scale at the top and draw a line downward. In the event your viscosity falls in the middle of two scale lines, select the line on the left (the higher value).

Mark the value of your required output (10L/min) on the scale on the left, and draw a horizontal line to the right.

: Estimated output (L/min) : Output per revolution (mL/rev) : rpm : Effective differential pressure (MPa) : Coefficient of leakage (L/min)/(MPa) : Viscosity (mPa•s) : Constant GX/M-12 : K=3

GX/M-15 : K=5.5GX/M-25 : K=9.5GX/M-32 : K=15

QcqNP

K

= K x -0.65 -(1)

Qc = q x N/1000 - x P-(2)

For the value of the coefficient of leakage in formula (1),see the viscosity-leakage coefficient graph.

50.0

10000 3000 500 200

40.0

30.0

20.0

10.0

5.0

1.0

0.5

0.1

0.0550 100 300 500 1000 2000

360 600 18001200

d

HH sc

k

g

aij

W e

eji

mn

fb

oo

r

4-ø124-ø12

p

p

q

fL

daW

L

g

s

c

k

GM typeGX type

Dimensions in mm

02MC

aModel Motor b c d e f g H i j k L m n W o p q r s Mass kg

252 440 111.5 222 80 280 142 182.5 13 14 24 442 41 27.5 268 160.5 17

252 440 111.5 222 80 280 151 186.5 13 14 24 469 41 27.5 277 160.5 19

252 440 111.5 222 80 280 151 186.5 13 14 24 469 41 27.5 277 Rc1/8 Rc1/8 160.5 19

252 440 120 222 80 280 152 205 13 14 24 501 41 27.5 278 Rc1/2 Rc3/8 169 26

252 440 111.5 222 80 280 160 219.5 13 14 24 528 41 27.5 286 160.5 24

128 – 95 98 121 141 142 189.3 65 66 24 423 – – 222 – – 144 21

128 – 95 98 121 141 151 189.3 65 66 24 445 – – 231 – – 144 24

266 570 140.5 236 100 360 152 225.5 8 9.5 30 553 49.5 36 285 202.5 34

266 570 140.5 236 100 360 166 241.5 8 9.5 30 607 49.5 36 299 Rc1/4 Rc1/8 202.5 42

266 570 150 236 100 360 172 289 8 9.5 30 648 49.5 36 305 Rc1 Rc3/4 212 49

266 570 140.5 236 100 360 165 265.5 8 9.5 30 606 49.5 36 298 202.5 35

160 - 120 120 165 245 152 229.5 83.5 85 30 573 - - 252 – – 182 43

340 740 170 300 115 510 210 309 0 0 37 707 80 60 380 247 69

340 740 170 300 115 510 227 331 0 0 37 724 80 60 397 Rc3/8 Rc1/4 247 79

340 740 170 300 115 510 227 331 0 0 37 724 80 60 397 Rc1-1/4 Rc1 247 79

340 740 170 300 115 510 175 337 0 0 37 725 80 60 345 247 74

205 - 146 160 190 224 210 288.5 91 91 37 650 – – 335 – – 223 80

04MC02SC04SC04G02MC04MC07MC15MC15SC07G07MC22MC37MC22SC15G22MC

GX-12SGX-15S

GX-12SGX-15S

GX-25S

GM-25SGX-32S

GM-32S

mm

Chemical gear pumps

( )Country codes

Actual pumps may differ from the photos. Specifications and dimensions are subject to change without prior notice. For futher details please contact us.

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IWAKI CO.,LTD. 6-6 Kanda-Sudacho 2-chome Chiyoda-ku Tokyo 101-8558 Japan TEL : (81)3 3254 2935 FAX : 3 3252 8892

This catalogue is printed on 100% Recycled Paper.

2002.11/3000SXN

Applications• Non pulsating constant flow injection of bonding solution in the manufacturing process of copper foil.• Constant flow spraying of oil laden water (waste liquid burning equipment)• Constant flow transfer of magnetic slurry• Constant flow transfer of paint or dye slurry• Constant flow flocculant injection• Constant flow injection of paper reinforcing agent• Spraying of glazing agent in ceramic manufacturing• Enamel manufacturing