Grundfos NB Series Bedienungsanleitung

NB, NBG

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions

CONTENTS Page

1. Symbols used in this document

2. General information

NB, NBG are non-self-priming, single stage,

centrifugal volute pumps with axial inlet port and

radial outlet port.

NB pumps comply with EN 733.

NBG pumps comply with ISO 2858.

1. Symbols used in this document 2

2. General information 2

3. Receiving the product 3

3.1 Delivery 3

3.2 Transporting the product 3

3.3 Handling the product 3

3.4 Storing the product 4

4. Identification 4

4.1 Nameplate 4

4.2 Type key 5

5. Applications 8

5.1 Pumped liquids 8

6. Operating conditions 8

6.1 Ambient temperature and altitude 8

6.2 Liquid temperature 8

6.3 Max. operating pressure 8

6.4 Minimum inlet pressure 9

6.5 Maximum inlet pressure 9

6.6 Minimum flow rate 9

6.7 Maximum flow rate 9

6.8 Shaft seals 10

7. Mounting of motor on bare shaft pumps11

7.1 Mounting of motor on pump housing

without feet 11

7.2 Mounting of motor on pump housing with

feet 13

8. Mechanical installation 15

8.1 Pump location 15

8.2 Installation positions 16

8.3 Foundation of NB, NBG pump without

base frame 16

8.4 Foundation of NB, NBG pump with base

frame 17

8.5 Pipework 20

8.6 Vibration damping 21

8.7 Expansion joints 21

8.8 Measuring instruments 22

9. Flange forces and torques 23

10. Electrical connection 25

10.1 Motor protection 25

10.2 Frequency converter operation 25

11. Startup 26

11.1 General information 26

11.2 Priming 26

11.3 Checking the direction of rotation 26

11.4 Starting up the pump 27

11.5 Shaft seal run-in period 27

11.6 Start/stop 27

11.7 Reference readings of monitoring

equipment 27

12. Maintenance 28

12.1 Pump 28

12.2 Mechanical shaft seals 28

12.3 Motor 28

12.4 Lubrication 28

13. Periods of inactivity and frost

protection 28

14. Service 28

14.1 Service kits 28

15. Technical data 28

15.1 Electrical data 28

15.2 Sound pressure level 29

16. Fault finding 30

17. Disposal 31

Warning

Prior to installation, read these installation

and operating instructions. Installation and

operation must comply with local

regulations and accepted codes of good

practice.

Warning

If these safety instructions are not

observed, it may result in personal injury.

Caution

If these safety instructions are not

observed, it may result in malfunction or

damage to the equipment.

Note

Notes or instructions that make the job

easier and ensure safe operation.

English (GB)

3. Receiving the product

3.1 Delivery

The pumps are tested 100 % before leaving the

factory. The test includes a function test where the

pump performance is measured to ensure that the

pump meets the requirements of relevant standards.

Test certificates are available from Grundfos.

3.2 Transporting the product

Always transport the pump in the specified position.

During transport, the pump must be fastened

securely to prevent damage to the shaft and shaft

seal caused by excessive vibrations and knocks. Do

not lift the pump by means of the shaft.

3.3 Handling the product

Weight: See label on the packing.

Lift the pumps by means of nylon straps and

shackles or a hook as shown on figs 1to 3.

Fig. 1 Correct lifting of pump without base

frame

Fig. 2 Correct lifting of pump with base frame

Fig. 3 Correct lifting of pump without motor

Fig. 4 Incorrect lifting of pump

Warning

Pay attention to the pump weight, and take

precautions to prevent personal injury if

the pump should topple or fall by accident.

Warning

Motors from 4 kW and up are supplied with

lifting eyes which must not be used for

lifting the entire pump unit. See fig. 4.

TM03 3973 1306

TM04 5179 2809TM05 3309 1112TM03 3972 1306

English (GB)

3.4 Storing the product

The contractor must inspect the equipment on

delivery and make sure that it is stored in such a way

that corrosion and damage are avoided. If more than

six months will pass before the equipment is put into

operation, please consider applying a suitable

corrosion inhibitor to the internal pump parts.

Make sure that the corrosion inhibitor used does not

affect the rubber parts with which it comes into

contact.

Make sure that the corrosion inhibitor can easily be

removed.

To prevent water, dust, etc. from entering the pump,

keep all openings covered until the pipes are to be

fitted. The cost of having to dismantle the pump

during startup to remove foreign objects can be very

high.

4. Identification

4.1 Nameplate

Fig. 5 Example of nameplate for NB

Legend

TM05 6006 4512

Pos. Description

1 Type designation

2 Model

3 Rated flow rate

4 Pressure rating or maximum temperature

5 Country of origin

6 Rated speed

7 Head

8 Minimum efficiency index

9Hydraulic efficiency at optimum efficiency

point

bar/°CMAX

m /h

p/t

mnmin-1

Model

96145329

Type

NB 32-125.1/142 AE-F-1-A-E-S-BAQE

B 96126252 P2 0612 0001

23.4 22.6 2900

16/120

Made in Hungary

DK-8850 Bjerringbro, Denmark

0(, p

0.70 68.8

English (GB)

4.2 Type key

Model B

Example 1, pump design according to EN 733 NB 32 -125 .1 /142 AE F 1 A E S BAQE

Example 2, pump design according to ISO 2858 NBG 125 -100 -160 /160-142 A F 2 N K S DQQK

Type range

Nominal diameter of inlet port (DN)

Nominal diameter of outlet port (DN)

Nominal impeller diameter [mm]

Reduced performance: .1

Actual impeller diameter [mm]

Code for pump version; the codes may be combined

A Basic version

BOversizemotor

C Without motor

D Pump housing with feet

EWith ATEX approval, certificate or test report, the second character of the pump

version code is an E

F Version with base frame

S With support blocks

X Special version; used in case of further customisation than already listed

Pipe connection

E Table E flange

F DIN flange

G ANSI flange

J JIS flange

Flange pressure rating (PN - rated pressure)

1 10 bar

2 16 bar

3 25 bar

4 40 bar

5 Other pressure rating

Materials

Pump

housing Impeller Wear ring Shaft

A EN-GJL-250 EN-GJL-200 Bronze/brass 1.4301

B EN-GJL-250 Bronze

CuSn10 Bronze/brass 1.4301

C EN-GJL-250 EN-GJL-200 Bronze/brass 1.4401

D EN-GJL-250 Bronze

CuSn10 Bronze/brass 1.4401

E EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4301

F EN-GJL-250 Bronze

CuSn10 EN-GJL-250 1.4301

G EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4401

English (GB)

H EN-GJL-250 Bronze

CuSn10 EN-GJL-250 1.4401

I 1.4408 1.4408 1.4517 1.4462

J 1.4408 1.4408

Carbon-graphite-

filled PTFE

(Graflon®)

1.4462

K 1.4408 1.4408 1.4517 1.4401

L 1.4517 1.4517 1.4517 1.4462

M 1.4408 1.4517 1.4517 1.4401

N 1.4408 1.4408

Carbon-graphite-

filled PTFE

(Graflon®)

1.4401

P 1.4408 1.4517

Carbon-graphite-

filled PTFE

(Graflon®)

1.4401

R 1.4517 1.4517

Carbon-graphite-

filled PTFE

(Graflon®)

1.4462

S EN-GJL-250 1.4408 Bronze/brass 1.4401

T EN-GJL-250 1.4517 Bronze/brass 1.4462

U 1.4408 1.4517 1.4517 1.4462

W 1.4408 1.4517

Carbon-graphite-

filled PTFE

(Graflon®)

1.4462

X Special version

Rubber parts in pump

Material of O-ring for pump cover

E EPDM

F FXM (Fluoraz®)

K FFKM (Kalrez®)

M FEPS (PTFE-sheathed silicone O-ring)

X HNBR

VFKM(Viton

®)

Shaft seal arrangement

S Single seal

Code for mechanical shaft seal and shaft seal rubber parts

Example 1, pump design according to EN 733 NB 32 -125 .1 /142 AE F 1 A E S BAQE

Example 2, pump design according to ISO 2858 NBG 125 -100 -160 /160-142 A F 2 N K S DQQK

English (GB)

Example 1 shows an NB 32-125.1 pump with these

characteristics:

Example 2 shows an NBG 125-100-160 pump with

these characteristics:

4.2.1 Letter codes for shaft seals

For a thorough description of shaft seal types and materials, see the English-language data booklet entitled

"NB, NBG, NK, NKG, NBE, NBGE, NKE, NKGE - Custom-built pumps according to EN 733 and ISO 2858".

• reduced performance

• 142 mm impeller

• basic version

• ATEX approval, certificate or test report

• DIN flange to EN 1092-2 pipe connection

• 10 bar flange pressure rating

• cast-iron pump housing, EN-GJL-250

• cast-iron impeller, EN-GJL-200

• bronze/brass wear ring

• stainless-steel shaft, EN 1.4301

• EPDM O-ring for pump cover

• single shaft seal arrangement

• BAQE shaft seal.

• 160-142 mm conical impeller

• basic version

• DIN flange to EN 1092-2 pipe connection

• 16 bar flange pressure rating

• stainless-steel pump housing, EN 1.4408

• stainless-steel impeller, EN 1.4408

• carbon-graphite-filled PTFE (Graflon®) wear

ring

• stainless-steel shaft, EN 1.4401

• FFKM O-ring for pump cover

• single shaft seal arrangement

• DQQK shaft seal.

Example: 10 = BAQE B A Q E

Shaft seal type

A O-ring seal with fixed driver

B Rubber bellows seal

D O-ring seal, balanced

G Bellows seal, type B, with reduced seal faces

H Cartridge seal, balanced

Material, rotating seal face

A Carbon, metal-impregnated with antimony which is not approved for potable water

B Carbon, resin-impregnated

Q Silicon carbide

Material, stationary seat

A Carbon, metal-impregnated with antimony which is not approved for potable water

B Carbon, resin-impregnated

Q Silicon carbide

Material, secondary seal and other rubber and composite parts, except the wear ring

E EPDM

VFKM(Viton

®)

FFXM(Fluoraz

®)

K FFKM (Kalrez®)

XHNBR

U Dynamic O-rings in FFKM and static O-rings in PTFE

English (GB)

5. Applications

5.1 Pumped liquids

Clean, thin, non-explosive liquids without solid

particles or fibres. The pumped liquid must not attack

the pump materials chemically.

6. Operating conditions

6.1 Ambient temperature and altitude

The ambient temperature and the installation altitude

are important factors for the motor life as they affect

the life of the bearings and the insulation system.

If the ambient temperature exceeds the

recommended maximum ambient temperature or the

installation altitude exceeds the recommended

maximum altitude above sea level, see fig. 6, the

motor must not be fully loaded due to the low density

and consequently low cooling effect of the air. In

such cases, it may be necessary to use a motor with

a higher output.

Fig. 6 The maximum motor output depends on

the ambient temperature and altitude

Legend

Example

A pump with a 1.1 kW IE2 MG motor: If this pump is

installed 4750 m above sea level, the motor must not

be loaded more than 88 % of the rated output. At an

ambient temperature of 75 °C, the motor must not be

loaded more than 78 % of the rated output. If the

pump is installed 4750 m above sea level at an

ambient temperature of 75 °C, the motor must not be

loaded more than 88 % x 78 % = 68.6 % of the rated

output.

6.2 Liquid temperature

-40 - +140 °C.

The maximum liquid temperature is stated on the

pump nameplate. It depends on the shaft seal

chosen.

For EN-GJL-250 cast-iron pump housings, local

regulations may not allow liquid temperatures above

+120 °C.

6.3 Max. operating pressure

Fig. 7 Pressures in the pump

The inlet pressure + the pump pressure must be

lower than the maximum operating pressure stated

on the pump nameplate. Operation against a closed

valve gives the highest operating pressure.

TM04 4914 2209

Pos. Description

1 0.25 - 0.55 kW MG motors

20.75 - 22 kW MG motors, IE2/IE3

0.75 - 450 kW MMG-H motors, IE2

3 0.75 - 462 kW Siemens motors, IE2

20 25 30 35 40 45 50 55 60 65 70 75 80

100

[%]

t[°C]

1000 2250 3500 4750 m

TM04 0062 4907

Inlet pressure

Pump pressure

Maximum operating pressure, i.e.

pressure above atmospheric pressure

English (GB)

6.4 Minimum inlet pressure

Pay attention to the minimum inlet pressure to avoid

cavitation. The risk of cavitation is higher in the

following situations:

• The liquid temperature is high.

• The flow rate is considerably higher than the

pump's rated flow rate.

• The pump is operating in an open system with

suction lift.

• The liquid is sucked through long pipes.

• The inlet conditions are poor.

• The operating pressure is low.

6.5 Maximum inlet pressure

The inlet pressure + the pump pressure must be

lower than the maximum operating pressure stated

on the pump nameplate. Operation against a closed

valve gives the highest operating pressure.

6.6 Minimum flow rate

The pump must not run against a closed valve as

this will cause an increase in temperature/formation

of steam in the pump. This may cause shaft damage,

impeller erosion, short life of bearings and damage

to stuffing boxes or mechanical shaft seals due to

stress or vibration. The continuous flow rate must be

at least 10 % of the rated flow rate. The rated flow

rate is stated on the pump nameplate.

6.7 Maximum flow rate

Do not exceed the maximum flow rate as otherwise

there is a risk of for instance cavitation and overload.

The minimum and maximum flow rates can be read

either from the performance curve pages in the

relevant data booklets or from a curve for a specific

pump when selecting it in Grundfos Product Center.

See www.grundfos.com.

Fig. 8 Example from Grundfos Product Center

in www.grundfos.com showing minimum

and maximum flow rate

TM05 2444 5111

Minimum flow rate

Maximum flow rate

English (GB)

6.8 Shaft seals

The operating range of the seals is described for two

main applications: Pumping of water or pumping of

coolants.

Seals with a temperature range of 0 °C and up are

mainly used for pumping water, while seals for

temperatures below 0 °C are mainly intended for

coolants.

Note

We do not recommend that you operate

the pump at maximum temperature and

maximum pressure at the same time as

the seal life will be reduced and periodic

noise will occur.

Shaft seal diameter [mm] 28, 38 48 55 60

Shaft seal type Seal

faces Rubber Code Temperature

range Max. pressure

[bar]

Bellows seal, type B,

unbalanced

AQ1EPDM BAQE 0-120 °C 16 16 16 16

AQ1FKM BAQV 0-90 °C 16 16 16 16

BQ1EPDM BBQE 0-120 °C 16 16 16 16

BQ1FKM BBQV 0-90 °C 16 16 16 16

Q1B EPDM BQBE 0-100 °C 16 - - -

Q7Q7EPDM BQQE -25 - +120 °C 16 16 16 16

Q7Q7FKM BQQV -10 - +90 °C 16 16 16 16

Bellow seal, type B,

unbalanced with reduced seal

faces

Q1Q1EPDM GQQE -25 - +60 °C 16 16 16 16

Q1Q1FKM GQQV -10 - +60 °C 16 16 16 16

O-ring seal, type A,

unbalanced

Q1A EPDM AQAE 0-120 °C 16 16 16 16

Q1A FKM AQAV 0-90 °C 16 16 16 16

Q1Q1EPDM AQQE -25 - +90 °C 16 16 16 16

Q1Q1FKM AQQV -10 - +90 °C 16 16 16 16

Q1Q1HNBR AQQX -15 - +90 °C 16 16 16 16

Q1Q1FFKM AQQK 0-90 °C 16 16 16 16

O-ring seal, type D, balanced

AQ1FXM DAQF 0-140 °C 25 25 25 25

Q6Q6EPDM DQQE -20 - +120 °C 25 25 25 25

Q6Q6FKM DQQV -10 - +90 °C 25 25 25 25

Q6Q6HNBR DQQX -15 - +120 °C 25 25 25 25

Q6Q6FFKM DQQK 0-120 °C 25 25 25 25

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