Grundfos NBG 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 suction port and

radial discharge 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. Delivery and handling 3

3.1 Delivery 3

3.2 Handling 3

4. Identification 4

4.1 Nameplate 4

4.2 Type key 5

5. Applications 7

5.1 Pumped liquids 7

6. Operating conditions 7

6.1 Ambient temperature and altitude 7

6.2 Liquid temperature 7

6.3 Max. operating pressure 8

6.4 Min. inlet pressure 8

6.5 Max. inlet pressure 8

6.6 Min. flow rate 8

6.7 Max. flow rate 8

6.8 Shaft seals 9

7. Pump without motor 10

7.1 Mounting of motor on pump housing

without feet 10

7.2 Mounting of motor on pump housing with

feet 12

8. Mechanical installation 14

8.1 Preparations before installation 14

8.2 Pump location 14

8.3 Connection 15

8.4 Foundation of NB, NBG pump without

base frame 15

8.5 Foundation of NB, NBG pump with base

frame 16

8.6 Pipework 19

8.7 Vibration dampening 20

8.8 Expansion joints 20

8.9 Measuring instruments 21

9. Flange forces and torques 22

10. Electrical connection 24

10.1 Motor protection 24

10.2 Frequency converter operation 24

11. Commissioning and startup 25

11.1 General information 25

11.2 Commissioning 25

11.3 Priming 25

11.4 Checking the direction of rotation 25

11.5 Startup 26

11.6 Shaft seal run-in period 26

11.7 Start/stop 26

11.8 Reference readings of monitoring

equipment 26

12. Maintenance 27

12.1 Pump 27

12.2 Mechanical shaft seals 27

12.3 Motor 27

12.4 Lubrication 27

13. Periods of inactivity and frost

protection 27

14. Service 27

14.1 Service kits 27

15. Technical data 27

15.1 Electrical data 27

15.2 Sound pressure level 27

16. Fault finding 28

17. Disposal 29

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. Delivery and handling

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 Handling

Weight: See label on the packing.

Pumps should be lifted 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

Pump motors as from 4 kW 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)

4. Identification

4.1 Nameplate

Fig. 5 Example of nameplate for NB

Legend

TM05 6006 4512

Pos. Description

1 Type designation

2 Model

3 Flow rate

4 Max. pressure/temperature

5 Country of origin

6 Pump speed

7 Pump head

8 Minimum efficiency index

9Hydraulic pump efficiency at best

efficiency point

bar/°CMAX

m /h

p/t

mnmin

-1

Model

96145329

Type

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

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

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 suction port (DN)

Nominal diameter of discharge 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

B Oversize motor

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 (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 - nominal pressure)

110bar

216bar

325bar

440bar

5 Other pressure rating

Materials

Pump

housing Impeller Wear ring Shaft

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

BEN-GJL-250

Bronze

CuSn10 Bronze/brass 1.4301

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

DEN-GJL-250

Bronze

CuSn10 Bronze/brass 1.4401

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

FEN-GJL-250

Bronze

CuSn10 EN-GJL-250 1.4301

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

HEN-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

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:

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

EEPDM

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

• reduced performance

• 142 mm impeller

• basic version

• ATEX approval, certificate or test report

• DIN flange to EN 1092-2 pipework 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 pipework 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.

English (GB)

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".

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 °C to +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.

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

GBellows seal, type B, with reduced

seal faces

H Cartridge seal, balanced

Material, rotating seal face

Carbon, metal-impregnated

(antimony (not approved for potable

water))

B Carbon, resin-impregnated

Q Silicon carbide

Material, stationary seat

Carbon, metal-impregnated

(antimony (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

EEPDM

VFKM(Viton

®)

F FXM (Fluoraz®)

K FFKM (Kalrez®)

XHNBR

UDynamic O-rings in FFKM and static O-rings

in PTFE

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

English (GB)

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 (p)

stated on the pump nameplate. Operation against a

closed discharge valve gives the highest operating

pressure.

6.4 Min. 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 Max. inlet pressure

The inlet pressure + the pump pressure must be

lower than the maximum operating pressure (p)

stated on the pump nameplate. Operation against a

closed discharge valve gives the highest operating

pressure.

6.6 Min. flow rate

The pump must not run against a closed discharge

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 Max. flow rate

The maximum flow rate must not be exceeded 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.

Fig. 8 Example from Grundfos Product Center

showing minimum and maximum flow

rate

TM04 0062 4907

Inlet pressure

Pump pressure

Maximum operating pressure, i.e.

pressure above atmospheric pressure

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: Operation at maximum temperature and

maximum pressure at the same time is not

recommended as the seal life will be reduced

and periodical 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

English (GB)

7. Pump without motor

7.1 Mounting of motor on pump housing

without feet

The pumps are supplied with a transport bracket

protecting the shaft seal during transport. When you

mount the motor, follow the instructions shown in

these drawings.

TM05 3327 1212

TM03 3906 1212

1. Remove the coupling guard and loosen the

set screws in the shaft.

2. Place the pump on the motor.

TM03 3907 1212

TM03 3908 1212

3. Fit and tighten the motor screws to the

correct torque. See below.

4. Remove the nut, washer and transport

bracket.

M8: 12 ± 2.4 Nm

M10: 25 ± 5 Nm

M12: 40 ± 8 Nm

M16: 100 ± 20 Nm

M20: 150 ± 30 Nm

M24: 200 ± 40 Nm

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