GRUNDFOS DATA BOOKLET

CM3-8 A-R-A-E-AVBE F-A-A-N Grundfos pump 96806809

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Printed from Grundfos Product Centre [2018.06.003]

Position Qty. Description1 CM3-8 A-R-A-E-AVBE

Product No.: On request

Compact, reliable, horizontal, multistage, end-suction centrifugal pump with axial suction port and radialdischarge port. The shaft, impellers and chambers are made of stainless steel. The inlet and dischargeparts are made of cast iron. The mechanical shaft seal is a special designed, unbalanced O-ring seal.Pipework connection is via internal Whitworth pipe threads, Rp (ISO 7/1).

The pump is fitted with a 3-phase, foot-mounted, fan-cooled asynchronous motor.

Further product detailsPump and motor are integrated in a compact and user-friendly design. The pump is fitted to a low baseplate, making it ideal for installation in systems where compactness is important.The state-of-the-art design and materials of the shaft seal ensure high wear resistance, improvedsticking and dry-running capabilities and long operating life.Servicing the pump requires no special service tools. Service parts are in stock for quick delivery andare available as kits, single parts or bulk. Service videos are available on www.youtube.com.

PumpA combination of a stop ring and a Nord-lock® washer secures a tight and reliable fixation of theimpeller spacing pipes to the splined pump shaft. It is possible to remove and fit the hydraulic parts fromthe pump side. The inlet part, chambers and discharge part are hold together by four staybolts.

The pump is fitted with an unbalanced O-ring seal with a rigid torque-transmission system. It has a fixedseal driver ensuring a reliable rotation of all parts. The dynamic secondary seal is an O-ring.Primary seal:

• Rotating seal ring material: aluminium oxide (alumina)• Stationary seat material: carbon graphite, resin-impregnated

Carbon graphite against alumina is a good all-round seal for not too demanding applications. Thecorrosion resistance is often limited in water to a range between pH 5 and pH 10. Usage in liquidsabove 90 °C is not recommended. The seal can handle dry-running conditions for short periods.Secondary seal material: EPDM (ethylene-propylene rubber)EPDM has excellent resistance to hot water. EPDM is not suitable for mineral oils.

The pump shaft is connected to the motor shaft through a left thread and tight fit. The shaft cannot bedismantled.

MotorThe motor is a totally enclosed, fan-cooled motor with principal dimensions to EN 50347. Electricaltolerances comply with EN 60034.

The motor efficiency is classified as IE2 in accordance with IEC 60034-30.The motor does not incorporate motor protection and must be connected to a motor-protective circuitbreaker which can be manually reset. The motor-protective circuit breaker must be set according to therated current of the motor (I1/1).

An installation indicator is fitted to the motor fan cover. Based on the motor cooling air, it indicates thedirection of rotation of the motor. The motor is fitted with a directional sticker.

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Printed from Grundfos Product Centre [2018.06.003]

Technical data

Liquid:Pumped liquid: WaterLiquid temperature range: -20 .. 40 °CLiquid temperature during operation: 20 °CDensity: 998.2 kg/m³

Technical:Rated flow: 3.1 m³/hRated head: 55.9 mPrimary shaft seal: AVBEApprovals on nameplate: CE,WRAS,ACS,TR,EACCurve tolerance: ISO9906:2012 3B

Materials:Pump housing: Cast iron

EN-JL1030ASTM 30 B

Impeller: Stainless steelDIN W.-Nr. 1.4301AISI 304

Rubber: EPDM

Installation:Maximum ambient temperature: 55 °CMaximum operating pressure: 10 barMax pressure at stated temp: 10 bar / 40 °CFlange standard: WHITWORTH THREAD RPPump inlet: Rp 1Pump outlet: Rp 1

Electrical data:Motor type: 80CIE Efficiency class: IE2Rated power - P2: 1.2 kWMains frequency: 50 HzRated voltage: 3 x 220-240D/380-415Y VService factor: 1Rated current: 4,8-5,2/2,8-3 AStarting current: 770-800 %Rated speed: 2820-2860 rpmMotor efficiency at full load: 79.6 %Enclosure class (IEC 34-5): IP55Insulation class (IEC 85): F

Others:Minimum efficiency index, MEI ≥: 0.7Net weight: 16.8 kgGross weight: 19.3 kg

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Printed from Grundfos Product Centre [2018.06.003]

On request CM3-8 A-R-A-E-AVBE 50 HzH

[m]

0

10

20

30

40

50

60

70

80

Q [m³/h]0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

eta[%]

0

10

20

30

40

50

60

70

80

90

CM3-8, 3*400 V, 50Hz

P2[W]

0

200

400

600

800

1000

1200

NPSH[m]

0

2

4

6

8

10

12

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Printed from Grundfos Product Centre [2018.06.003]

H[m]

0

10

20

30

40

50

60

70

80

Q [m³/h]0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

eta[%]

0

10

20

30

40

50

60

70

80

90

CM3-8, 3*400 V, 50Hz

P2[W]

0

200

400

600

800

1000

NPSH[m]

0

2

4

6

8

10

Rp 3/8

10.5

141

75

148.

5

125

158

Rp 1

Rp 1

184

27.4 192.8233.8

261.2

96

137

454

220.2

195.7

DIRECTION OF ROTATION

HIGH VOLTAGEDIRECTION OF ROTATION

LOW VOLTAGE

98.3

169L1

L2L3

L1L2

L3

Description ValueGeneral information:Product name: CM3-8 A-R-A-E-AVBEProduct No: On requestEAN number: On requestTechnical:Rated flow: 3.1 m³/hRated head: 55.9 mImpellers: 8Primary shaft seal: AVBEApprovals on nameplate: CE,WRAS,ACS,TR,EACCurve tolerance: ISO9906:2012 3BPump version: AModel: AMaterials:Pump housing: Cast iron

EN-JL1030ASTM 30 B

Impeller: Stainless steelDIN W.-Nr. 1.4301AISI 304

Material code: ARubber: EPDMCode for rubber: EInstallation:Maximum ambient temperature: 55 °CMaximum operating pressure: 10 barMax pressure at stated temp: 10 bar / 40 °CFlange standard: WHITWORTH THREAD RPPump inlet: Rp 1Pump outlet: Rp 1Connect code: RLiquid:Pumped liquid: WaterLiquid temperature range: -20 .. 40 °CLiquid temperature during operation: 20 °CDensity: 998.2 kg/m³Electrical data:Motor type: 80CIE Efficiency class: IE2Rated power - P2: 1.2 kWMains frequency: 50 HzRated voltage: 3 x 220-240D/380-415Y VService factor: 1Rated current: 4,8-5,2/2,8-3 AStarting current: 770-800 %Rated speed: 2820-2860 rpmMotor efficiency at full load: 79.6 %Enclosure class (IEC 34-5): IP55Insulation class (IEC 85): FMotor protec: NOOthers:Minimum efficiency index, MEI ≥: 0.7Net weight: 16.8 kgGross weight: 19.3 kg

Rp 3/8

10.5

141

148.5

125158

Rp 1

Rp 1

27.4192.8233.8

261.2

96137

454

220.2195.7

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Printed from Grundfos Product Centre [2018.06.003]

On request CM3-8 A-R-A-E-AVBE 50 Hz

Note! All units are in [mm] unless others are stated.Disclaimer: This simplified dimensional drawing does not show all details.

Rp

3/8

10.5

141

75

148.5

125

158

Rp

1

Rp

1

184

27.4

192.

823

3.8

261.

2 96 137 45

4

220.

2

195.

7

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Printed from Grundfos Product Centre [2018.06.003]

Exploded view

301a

219

92

7

7a

77

301a

92

11

9

51

100

49

105

45

215a

215

18

217215a

534a534

531531a

28

17

251d

251a

6

11b

66a

67

530530a

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Printed from Grundfos Product Centre [2018.06.003]

Sectional drawing (TM058200 for TPE2,TPE3)

4

2 13

5

TM058200

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Printed from Grundfos Product Centre [2018.06.003]

Exploded view ( TM057026 for MGE model H/I )

251d

251b

290

287277a

286

277

273a

273

268268a289a289

288b288288a

251a

252b

156c

159d

156b

156d188

275a

153

154

158

178

185

192

191

159e

156c 156

151152

266

187

291

293

252a

172

150

287a

502

273b

157

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Printed from Grundfos Product Centre [2018.06.003]

Parts list CM3-8, Product No. On requestValid from 10.6.2011 (1123)

Pos Description Annotation Données de classification Référence Quantité UnitéMG80C 1 pcsCross recess countersunk screw 4 pcs

- 4 Chamber cpl. 5 pcsGuide vane 6Plate 1Retainer 1Intermediate chamber 1Vane 1

45 Neck ring 165 Retainer 1

- 4.f Chamber 1 pcsGuide vane 6Plate 1Plate 1Retainer 1

45 Neck ring 165 Retainer 1

- 4a Chamber w. bearing cpl. 1 pcsGuide vane 6Retainer for bearing 1Bearing bush 1Retainer 1Intermediate chamber 1Vane 1

45 Neck ring 165 Retainer 1

- 5a Chamber cpl. 1 pcsRetainer 1Intermediate chamber 1Vane 1

45 Neck ring 165 Retainer 16 Inlet part 1 pcs

- 25 Drain plug cpl. 2 pcs11 O-ring Diameter: 18,5 1

Material type: EPDMThickness: 2

25 Plug 126 Hex socket head cap screw Length (mm): 170 4 pcs

Thread: M636 Lock nut Thread: M8 1 pcs47.a Bearing ring 1 pcs49 Impeller cpl. 8 pcs51 Pump shaft Diameter: D12 1 pcs64 Spacing pipe 6 pcs64.a Spacing pipe 1 pcs64.c Clamp 1 pcs66 Wedge lock washer 1 pcs76 Nameplate 2 pcs

- 105 Shaft seal 1 pcs102 O-ring Diameter: 17,86 1

Material type: EPDMThickness: 2,62

103 Seal ring, stationary 1104 Seal ring, rotating 1107 O-ring 1108 Compression spring 1111 Retainer 1112 Driver for shaft seal 1

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Printed from Grundfos Product Centre [2018.06.003]

Pos Description Annotation Données de classification Référence Quantité Unité111.a Stop ring 1 pcs139.b Gasket Internal diameter: 103 9 pcs

Outer diameter: 110Thickness: 0,25

151 Fan cover 1 pcs151.a Installation indicator 1 pcs152 Pan head thread forming screw 2 pcs156 Fan 1 pcs191 Base plate 1 pcs

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Disclaimer: The information about the Grundfos pump in this document may be outdated. Data may be subject to alterations without further notice. Please contact us to verify the data above is still accurate/up-to-date.

All information is copyright Grundfos.

info@lenntech.comhttps://www.lenntech.comtel. +31 152 610 900 fax. +31 152 616 289