Printed from Grundfos CAPS

Position Qty. Description Single Price

1 Price on requestNK 65-315/272 R-AQAE

Note! Product picture may differ from actual product

Non-self priming, single-stage centrifugalpump according to EN 1092-2.

The pump is for the pumping of thin, clean orslightly contaminatedliquids without abrasive or long-fibredsolids.

Pump and 3-phase AC motor are mountedas separate units on a common baseplate andconnected via a Spacer-coupling.

The impeller is hydraulically as well asdynamically balanced.

The pump has the following characteristics:- flange dimensions according to

EN 1092-2,- Stainless steel 1.4517volute

pump housing,- stainless steel shaft

and Stainless steel 1.4517impellerand bronze wear rings,

- unbalanced mechanical shaft sealaccording to EN 12756.

Liquid:Liquid temperature range: 0 .. 120 CLiquid temp: 20 CDensity: 998.2 kg/m

Technical:Speed for pump data: 2970 rpmActual calculated flow: 120 m/hResulting head of the pump: 98.4 mActual impeller diameter: 272 mmShaft seal: AQAESecondary shaft seal: NONEMaximum operating pressure: 16 bar

Materials:Pump housing: Stainless steel 1.4517

DIN W.-Nr. 1.4517ASTM CD4MCuN

Impeller: Stainless steel 1.4517DIN W.-Nr. 1.4517ASTM CD4MCuN

Installation:Maximum ambient temperature: 60 C

1/5

Printed from Grundfos CAPS

Position Qty. Description Single Price

Maximum operating pressure: 16 barFlange standard: EN 1092-2Pump inlet: DN 80Pump outlet: DN 65Pressure stage: PN16Coupling type: Spacer

Electrical data:Motor type: MMG250MAIE Efficiency class: IE2Number of poles: 2Rated power - P2: 55 kWMains frequency: 50 HzRated voltage: 3 x 380-420D/660-725Y VRated current: 99,5-90,0/57,0-52,0 AStarting current: 750-750 %Cos phi - power factor: 0,9Rated speed: 2970-2970 rpmIE efficiency: IE2 93,4%Motor efficiency at full load: 93,4-93,4 %Motor efficiency at 3/4 load: 93,0-93,0 %Motor efficiency at 1/2 load: 91,4-91,4 %Enclosure class (IEC 34-5): 55Insulation class (IEC 85): FLubricant type: Grease

Others:Net weight: On request kgGross weight: On request kgShipping volume: 1.91 m3

2/5

Printed from Grundfos CAPS

Q(m/h)0 20 40 60 80 100 120 140

H(m)

0

10

20

30

40

50

60

70

80

90

100

eta(%)

01020304050607080

P(kW)

0

10

20

30

40

50

NPSH(m)

0

2

4

6

8

10P2P1

NK 65-315/272, 50 Hz

P2 = 45.5 kWP1 = 48.8 kW

NPSH = 4.33 m

Q = 120 m/hH = 98.4 mn = 2975 rpmLiquid temperature = 20 CDensity = 998.2 kg/m

Eta pump = 70.8 %Eta pump+motor = 65.9 %

Description ValueProduct name: NK 65-315/272 R-AQAEProduct No: On requestEAN number: On request Technical:Speed for pump data 2970 rpmActual calculated flow: 120 m/hResulting head of the pump: 98.4 mActual impeller diameter: 272 mmShaft seal: AQAESecondary shaft seal: NONEShaft diameter: 32 mmMaximum operating pressure 16 bar Materials:Pump housing: Stainless steel 1.4517

DIN W.-Nr. 1.4517ASTM CD4MCuN

Impeller: Stainless steel 1.4517DIN W.-Nr. 1.4517ASTM CD4MCuN

Material code: R Installation:Maximum ambient temperature: 60 CMaximum operating pressure 16 barFlange standard: EN 1092-2Pump inlet: DN 80Pump outlet: DN 65Pressure stage: PN16Coupling type: SpacerWear ring(s): neckring(s) Liquid:Liquid temperature range 0 .. 120 CLiquid temp: 20 CDensity: 998.2 kg/m Electrical data:Motor type: MMG250MAIE Efficiency class: IE2Number of poles: 2Rated power - P2: 55 kWMains frequency: 50 HzRated voltage: 3 x 380-420D/660-725Y VRated current: 99,5-90,0/57,0-52,0 AStarting current 750-750 %Cos phi - power factor: 0,9Rated speed: 2970-2970 rpmIE efficiency: IE2 93,4%Motor efficiency at full load: 93,4-93,4 %Motor efficiency at 3/4 load: 93,0-93,0 %Motor efficiency at 1/2 load: 91,4-91,4 %Enclosure class (IEC 34-5): 55Insulation class (IEC 85): FMotor protec: PTCMotor No: 83K15138Lubricant type: Grease Others:Net weight: On request kgGross weight: On request kgShipping volume: 1.91 m3

3/5

Printed from Grundfos CAPS

NK 65-315/272 50 Hz

Q(m/h)0 20 40 60 80 100 120 140

H(m)

0

10

20

30

40

50

60

70

80

90

100

eta(%)

0

10

20

30

40

50

60

70

80

P(kW)

0

10

20

30

40

50

60

NPSH(m)

0

2

4

6

8

10

12

P2P1

NK 65-315/272, 50 Hz

P2 = 45.5 kWP1 = 48.8 kW

NPSH = 4.33 m

Q = 120 m/hH = 98.4 mn = 2975 rpmLiquid temperature = 20 CDensity = 998.2 kg/m

Eta pump = 70.8 %Eta pump+motor = 65.9 %

4/5

Printed from Grundfos CAPS

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

NK 65-315/272 50 Hz

280

80

65O

n re

ques

t

2812

00

100

730

670

600

NA

355

4 x

19

8 x

19

125 =

=18

00

90

5/5

GRUNDFOS NB/NK

performaNce perfectioN

Sprinting into the world elite

combining tradition with forward thinking

Despite their somehow sturdy build and solid appearance, the

Grundfos end-suction pumps are ready to sprint into the top of

their field with eminent skills, strategic timing, innovative moves

and amazing performance and flexibility.

Introducing an array of new superior components and increased

performance and reliability, all wrapped in a more refined body

and interior, the Grundfos end-suction pumps are well prepared

for the future race.

Survival of the fittest

The Grundfos end-suction pumps are designed to work hard in

the most demanding industrial environments, where only the

fittest pumps will survive in the long run. The pumps are ultra

reliable and efficient, making them extremely suitable for a wide

range of applications pumping large volumes of water or other

liquids for industrial processes, cooling, heating, water supply,

air-conditioning, cleaning and fire systems.

2 3

complete eNd-SuctioN raNge

The Grundfos end-suction range comprises a complete series of

close-coupled and long-coupled pumps in full compliance with

EN733 and ISO2858 standards.

Grundfos end-suction pumps offer you a future-oriented pump

solution based on the fundamental principles and advantages

of modularity. They are built around standard modular compo-

nents, enabling easy configuration, customised solutions, and

facilitated service. A multitude of different pump variants are

available to suit your requirements to performance, application

and environment.

reliaBility iN focuS page 4-5

With Grundfos end-suction pumps you are guaranteed outstand-

ing reliability and performance during their entire lifetime. NB/NK

pumps radiate quality inside out, because we never compromise

when it comes to selecting quality materials.

By introducing surface treatment of all pump parts, stainless

steel shafts, closed ball bearings and refined casting processes,

the new end-suction pump is simply the best around.

lcc the total perSpective page 6-7

Choosing the most energy-efficient solution paves the way for

dramatic savings on operating costs. As Grundfos is a frontrun-

ner for global energy-saving ideas within the pump industry, all

Grundfos end-suction pumps are now available with the mar-

kets most energy-efficient EFF1 motors.

Other cost-saving factors such as extensive component modu-

larity, high-quality materials, improved hydraulics and impeller

design, and integrated frequency converters also add positively

to the total Life Cycle Cost calculation.

cuStomiSed to your NeedS page 8-9

A Grundfos end-suction pump solution can be configured and

customised for seamless operation in your industry-specific ap-

plication.

The optimum solution with regard to performance and energy

consumption can be designed by using Grundfos intelligent

product configurator Web/WinCAPS. It contains extensive in-

formation about the entire end-suction range, different compo-

nents and materials, performance curves, energy consumption

rates and more. So whatever your need, we have the solution.

innovative new design

It is an indisputable fact that extreme conditions call for extreme

reliability. That is why all the new end-suction pumps are de-

signed to demonstrate unsurpassed reliability and endurance in

demanding applications, no matter how hard and how long you

make them run.

We have optimised the design in a number of ways, which make

a notable difference. Surface treatment of all pump components

means an altogether better look and feel coupled with improved

durability and corrosion resistance. Other new and strong design

features are improved housing and impeller design, all stainless

steel shafts, closed ball bearings and different pump materials

for different applications and environments.

fine-tuned flow geometries

Keeping the hydraulic friction as low as possible is a vital pa-

rameter for overall pump performance and efficiency. To allow

essentially unimpeded liquid flow through the pump, the flow

geometries of both the impeller and the pump casing have been

fine-tuned by means of special 3D simulations and computer cal-

culations. Maximum compatibility between these two key com-

ponents means a minimum of aquadynamic disturbance and

thus reduced backflow and energy consumption.

The partner you can rely oN

performance curves

4 5

extensive r&d behind it all

Grundfos has one of the largest R&D departments in the pump

industry, employing nearly 500 engineers and technicians.

Absolutely nothing is left to chance when we release a new

pump series into the market, the Grundfos end-suction range be-

ing no exception.

Extensive research and development lie behind the improved

end-suction range to ensure unsurpassed reliability and per-

formance during the lifetime of the pump. Our dedicated R&D

engineers have looked into every aspect of pump technology to

optimise pump performance and find innovative and energy-

saving solutions.

Laboratory research has been backed by in-depth field testing

in representative industrial installations to verify that the pump

performs satisfactorily in demanding applications and environ-

ments.

Step-by-step quality control

Grundfos pumps are renowned for their high quality and supe-

rior performance all over the world, and rightly so. We focus on

quality in the entire value chain from initial purchase of raw

materials to final logistics and service. Grundfos end-suction

pumps are manufactured and quality tested in accordance with

ISO 9001 and ISO 14001 standards, which is your guarantee for

meticulous attention to every detail.

Quality management is applied not only in-house but also to every

link in the supply chain. This means that all our specialist suppliers

are rigorously evaluated with regards to material quality, produc-

tion processes, supply security and environmental standards.

Before being dispatched to the customer, the pump is subject to

a thorough factory acceptance test (FAT) at our high-technology

production and testing facilities. Factory acceptance tests are

performed in accordance with ISO 9906, Annex A, and all test

data are logged for subsequent documentation and generation

of test certificates.

Optimised hydraulics in housing and impeller

= unimpeded liquid flow

O-ring seal between pump housing and cover

= no risk of leakage

Housing, impeller and wear ring in different materials

= improved corrosion resistance

All stainless steel shafts

= improved corrosion resistance, no sticking elements

Closed ball bearings

= correct lubrication, no dust instrusion

H [m]

200

150

10080

60

40

20

10

4

4 10 20 40 100 200 400 1000 2000Q [m3/h]

end-suction50 Hz

H [m]

200

150

100

60

40

20

10

4

4 10 20 40 60 100 200 400Q [m3/h]

end-suctionin cast stainless steel

50 Hz

life cycle coStS are what really matters

thinking ahead is a good investment

Focusing exclusively on the purchase price when selecting your

pumps is most certainly an unwise approach. An overlooked rule

of thumb is that the initial investment represents only 5% of the

total cost of owning a pump during its lifetime. Maintenance

costs swallow about 5% of the total life cycle costs and energy

costs a staggering 90%.

This is to say that the long-term cost reduction that results from

making the right purchase is so significant that it will affect the

profitability of your installation as a whole. By looking at the to-

tal cost of ownership, the payback time of the investment will be

much shorter than you think.

cost efficiency that speaks for itself

Dramatic savings on operating costs can be gained by selecting

the most energy-efficient pump solution. Cost efficiency and

innovation have been the ultimate goals and the driving forces

behind the development of the new Grundfos end-suction range,

as energy costs are a crucial factor for all industries and a major

component of an end-suction pumps Life Cycle Costs.

cost-reducing factors

Higher efficiency rates of pumps and motors have been achieved

partly by improving housing and impeller design and partly by

incorporating high-efficiency motors in the pumps.

We have analysed and refined the casting mould for the housing,

as all tests show that the better the casting mould, the better the

pump performance. Optimised flow geometries of the impeller

and pump casing have reduced the hydraulic friction and thus

the amount of energy consumed.

The third crucial cost-reducing factor of the new Grundfos end-

suction range is the use of Efficiency 1 motors, as Efficiency 1

motors consume a minimum of electrical power while keeping a

high level of performance.

All the pumps in the Grundfos NB/NK range are available with

high efficiency Eff1 motors. Being an environmentally responsi-

ble company, Grundfos attaches great importance to supply cli-

ents with low energy-consuming products that meet the strict

demands stated in EUs CEMEP agreement concerning the reduc-

tion of harmful impacts on the environment.

6 7

Savings from day one

Demonstrating significantly better efficiency and operating per-

formance than its predecessors, the new end-suction pumps will

bring you substantial energy savings from day one.

Grundfos software tool WinCAPS enables you to select and fine-

tune each important part in your pump system. Based on these

input data, the configurator suggests the most effective way of

operation and selects the motor with the highest efficiency for

the specific task. The dimensioning features of the configura-

tor illustrate the consequences of changing parameters in your

pump system or mode of operation, and compares Life Cycle

Costs between alternative solutions.

correct dimensioning makes all the difference

Another important factor, when we talk money, is correct dimen-

sioning of the pump. Getting the best possible overall efficiency

out of your pump is a matter of reducing the gap between pump

capacity and the required pressure and volume or in other

words avoiding over-dimensioning of the pump.

The extensive range of end-suction models, selected by means

of intelligent product configuration, makes it possible to find the

best pump for the job at hand, thus eliminating the efficiency

drop associated with over-dimensioned pumps. Your pump solu-

tion can be configured and dimensioned to your exact needs and

requirements no more, no less.

With the pump configuration software it is possible to select the

rigth solution from more than 1 million variants of the same pump.

Efficiency and LCC calculations clearly demonstrate

how much difference a Grundfos end-suction pump

will mean to your business.

Selecting the right SolutioN

getting it right from the start

Grundfos can make a significant contribution to your decision-

making process and answer your questions about which fac-

tors to consider. Our specialists have a sound knowledge of the

pumps and the systems they are used in. They are therefore

equipped to discuss the bigger picture with you and help find the

best combination of components and materials for your specific

application.

multiple choices

The configuration possibilities of the Grundfos end-suction

pumps are many. Available in different variants and basic materi-

als and a number of configurations near the one million mark,

the end-suction programme is one of the most extensive and

comprehensive on the market.

take advantage of intelligent product configuration

We have developed an intelligent product configurator that

makes it even easier for you and us to find the optimum pump

for your application. While discussing requirements with the

Grundfos sales technician, he can use the software to find the

appropriate pump and place your order immediately.

You can also mix and match between the various components

yourself, until you find the end-suction pump that best suits your

application in no time at all. Use Grundfos WinCAPS to do the

configuration, or contact our specialists, who are ready with ex-

pert advice and configuration assistance.

Every year we execute more than 11,000 orders on special pump

variants, so do not hesitate to challenge us!

correct installation is a must

Correct installation and alignment of your pump is equally im-

portant to finding and sizing the right pump for your application.

Optimised pump operation is achieved only if the pump is aligned

correctly. Perfect alignment is ensured by means of a special la-

ser alignment tool, which can be made available from your local

Grundfos service partner.

If you are in any doubt of how to install or service your Grundfos

pump, a comprehensive selection of information material is just

a few keystrokes away. From our on-line catalogue, WebCAPS,

you can download product brochures, installation and operating

instructions, CAD drawings, data booklets and service manuals.

8

maintenance made simple and cost effective

The Grundfos end-suction pumps are designed with a back pull-

out system, which makes maintenance and servicing simple and

cost-effective. Both models allow for removal of the impeller

without dismantling the pump housing or pipework.

On the NB close-coupled models, motor and impeller can be re-

moved as one unit without dismantling the pump. On the long-

coupled NK pump models, the use of a spacer coupling enables

the motor to remain in place when impeller and shaft section are

removed for maintenance and service checks. This eliminates the

need for realigning the installation afterwards.

Maintenance is further facilitated by a unique system with im-

peller wear rings which means that you only need to change the

high-wear pump parts. The easily replaceable wear rings also sig-

nificantly prolong the life of the pump.

global service network

The Grundfos name is synonymous with dependable, high-quali-

ty pumps that are unlikely ever to cause any trouble. However, if

you do need service, rest assured that the global Grundfos service

network is geared to move fast and efficiently.

Grundfos is represented by own sales and service companies in

39 countries around the world, and more than 350 authorised

Grundfos service partners supplement our presence and offer

effective global service coverage. There is a Grundfos approved

service partner near you and you can get in touch with one

around the clock.

mix aNd match Next pageS

With Grundfos intelligent pump configurator software it is pos-

sible to select the right solution from more than 1 million vari-

ants of the same pump. The tool contains extensive amounts of

technical pump data that ensures pump design is in accordance

with over 1,500 regulations.

full overview

On the next page you can get a full overview of the many con-

figuration possibilities that your Grundfos end-suction pump

offers.

9

So many choiceS and yet so simple

Shaft seal

PTC sensor

or thermal

switch

Canadian /

US approval

Industrial

multiple plug

Single-phase

motors

Four-pole motors Anti -con-

densation unit

WIDe RaNge OF appLICaTIONS

PROTECTION

CSA/UL

APPROvED

HARTING

PLUGSINGLE PHASE FOUR POLE

MOTOR

HEATER

MO

TOR

SHa

FT S

eaL

pUM

pSe

LeC

TIO

NCEMEP

Eff1 motors

HIGH

EFFICIENCY

ATEX approved

EXPLOSION

PROOF

FIRE FIGHTING INDUSTRIAL WASHING WATER TREATMENT INDUSTRIAL COOLING INDUSTRIAL CLEANING

SEAWATER CHEMICAL LIQUIDS WATER SUPPLY AIR-CON HEATING

OvERSIzED OR

UNDERSIzED vOLTAGE

ENCLOSURE

CLASS MOUNTING

Alternative

viscosity or density

Special voltage Alternative

IP classAlternative

terminal box

position

SEALS PACKING RINGS

Cast iron

(EN-GJL-250)

for non-bronze

application

Low lead

bronze impellers

(CuSn10)

Wear ring in

EN-GJL-250

IMPELLER HOUSING

Stainless steel

impellers in two

variants: 1.4408

and 1.4517

WEAR RING

Wear ring in

1.4517 with

graflon

All baseplates

are according to

ISO3661 and avai-

lable for grouting

COUPLINGS

Bloc pumps are

available with and

without housing

feets

Bloc pumps can

be mounted as

required

Alternative drive

with diesel or

other motor

brands

Flange connections

are available accor-

ding to EN 1092-2

and AS (PN16)

Customised

paint finish

Many pump and

material certifi-

cates available

DIESEL DRIvEBASE PLATES

FLANGE

CONNECTIONS

ALTERNATIvE

COLOURS

CERTIFICATES

ISSUED

Pump dimen-

sions according

to EN733 and

ISO2858

DUTY POINT BLOC PUMP

ALTERNATIvE

MOUNTING

A duty point

specific is available

for both bloc and

norm pumps

IRRIGATION

PUMP

DIMENSION

GENERAL INDUSTRY

motorS

NB/NK motors are available in many different configurations to

meet the requirements presented by the power supply, the pump-

ing environment and/or the pumped liquid itself.

Power supply systems vary in terms of frequency, voltage and

protection methods.

Your environment may be explosive, very hot and/or very humid.

Special conditions also apply at great altitudes.

The liquid pumped can call for a special motor solution.

High or low viscosities and/or high or low densities may require

non-standard motor sizes. You may also need an explosion-proof

variant.

Shaft SealS

A range of shaft seals suitable for different liquids, liquid tempera-

tures or pressure areas is available. All shaft seals comply with the

EN 12 756 standard. The end-suction pumps are available for liquids

up to 140C without need for external cooling of the seal.

Many seal face materials and a variety of rubber materials are

available for media temperatures from -25 to +140C. Also, stuff-

ing boxes are available for a variety of media.

pump materialS

As a standard, the end-suction pumps are equipped with cast iron

impellers, however, as an option, impellers made of bronze and

stainless steel are also available. These improve corrosion resist-

ance when pumping chlorinated water or other aggressive liquids.

For high-salinity water, such as brackish or seawater, or other cor-

rosive liquids, all stainless steel models are available.

Likewise, the pump housing is available in cast iron and two stain-

less steel grades.

The easily replaceable wear rings come in different materials de-

pending on your needs.

pump optioN

You can specify your Grundfos end-suction pump with a specific

duty point, order it in alternative colours, with different flange con-

nections, with or without certificates, with standard or spacer cou-

pling, with special mounting devices and so on. We guarantee that

we can meet your every need.

Wear ring in

CuSn10

Wear ring in

1.4517

Cast iron (EN-GJL-

250) pump hous-

ing for clean water

applications

Stainless steel

housing in 1.4408

for chemical

media

Stainless steel

housing in

1.4517 as seawater

resistant

Standard

seals

Rubber

bellows seal

O-ring seal Balanced

o-ring seal

Packing rings Packing rings

with distribution

ring

The spacer

coupling provides

supreme service

availability

Standard

coupling

10 11

www.grundfos.com

Be

Being responsible is our foundation. We know that we have

a responsibility towards the people who are grundfos, to-

wards the innovative soul of grundfos, as well as towards

the surrounding world. Whatever we do, we make sure that

we have a firm and sustainable basis for doing it.

THINK

Thinking ahead makes innovation possible. We encourage

a certain grundfos way of thinking that is founded on the

belief that everyone must contribute by using his or her

judgment and foresight. We are looking for commitment

and ideas in everything we do in order to make the best

solutions. We think and then we act.

INNOVaTe

Innovation is the essence. It is the innovations that make

grundfos unique. We stand out because of our ability to

constantly create new solutions to the ever-changing de-

mands of the pump business. We meet every challenge,

and we are never afraid of taking the initiative remaining

true to our ideals is the basis for our ongoing renewal. In-

novation is the soul of grundfos.

Being responsible is our foundation Thinking ahead makes it possible

Innovation is the essence

V7

16 0

550

110

6

performance perfection

GRUNDFOS nb/nk stainless steel

making the most of stainless steel strength and efficiency are the hallmarks of this newly developed grundfos end-suction pump range. these powerful single-stage pumps are designed to work hard in the most demanding industrial environments, where only the fittest pumps will survive in the long run.

grundfos nB close-coupled and grundfos nk long-coupled end-suction pumps in stainless steel offer increased reliability in demanding application areas. they include industries, such as:> Water treatment > textiles > aqua farming> Washing machines> Biofuel plants> chemical industries> marine> pulp and paper> power plants

all grundfos nB/nk stainless steel end-suction pumps are excellent solutions for industrial applications where both small and large volumes of media need to be transferred or circulated. exceptional performance when pumping clean, slightly dirty, or aggressive media is just an example of the many benefits the pumps can provide. these media primarily include:> Drinking water> aggressive industrial water> swimming pool water> seawater > cleaning agents> Dyes > fats and oils> Wastewater> Liquid soap> solvent> Distillation

optimised hydraulics in housing and impeller

= free liquid flow

Loose flanges

= for easy installation

Double shaft-seal

= ensures 100% leak-free pumping

all stainless steel shafts

= improved corrosion resistance, no sticking elements

heavy-duty bearing brackets

= correct lubrication, long lifetime

featUres anD benefits

fUll linegrundfos is a global market leader within the pump industry. We manufacture over 16 million pumps and pump systems annually. grundfos was the first pump company to using stainless steel intensively, begining in 1968 and today is one of the biggest producers of stainless steel pumps.

We are specialists: it is our business to know all there is to know about pumping. our highly efficient worldwide organisation of sales, support and service professionals spans 46 countries in close cooperation with more than 530 service partners.

stanDarDsall pump components comply with Din en 733 and iso 2858 standards for end-suction centrifugal pumps. each grundfos pump is rigorously tested before leaving the factory, ensuring proper operation when installed and commissioned.

grundfos manufacturing plants are certified according to the iso 9001 standard for quality management.

all the information yoU neeD is online

extensive technical specifications for thousands of pump variants and more are available in grundfos Webcaps, our own internet-based pump sizing tool. You can find perfor-mance curves, technical literature, illustrations, and even installation and operation manuals. all you need is an in-ternet connection.

nB/nk stainless steel

flow, Q max. 800 m3/h

head, h max. 160 m

Liquid temperature -25 c to +160 c

operating pressure max. 25 bar

Technical daTa performance curve

4 10 20 50 100 200 500Q [m/h]

610

20

50

100

200H [m]

1000range of materials: gg, bronze, 1.4408 (316), 1.4517 (Duplex)

Being responsible is our foundationThinking ahead makes it possible

Innovation is the essence

9690

7682

\ 1

011

\ In

dust

ry

The nB/nK sTainless sTeel range:parT of The grundfos porTfolio

These highly reliable end-suction pumps ensure maximum efficiency at all times. They are part of the much wider Grundfos portfolio of pump technology, systems, and solutions a palette which features innovative cleantech, services, and more. Key areas served include:

> Heating

> Cooling

> Water supply

> Wastewater

> Fire fighting

> Dosing and Disinfection

> Industrial processes

Explore the Grundfos portfolio at www.grundfos.com.

It is probably larger than you think.

grundfos managemenT a/sPoul Due Jensens Vej 7DK-8850 BjerringbroTel: +45 87 50 14 00

www.grundfos.com/industryThe name Grundfos, the Grundfos logo, and the payoff BeThinkInnovate are registrated trademarks owned by Grundfos Management A/S or Grundfos A/S, Denmark. All rights reserved worldwide.

16 barEnd Suction PumpsWater supply, boosting, circulation and for liquid trans-fer in industry, agriculture, horticulture, fire fighting,environmental engineering etc.In accordance with DIN 24 256 and ISO 2858.Pump flange sizes: DN 32-300Maximum system pressure: 16 barLiquid temperature: 40C to +160C

50 Hz

NKG

TM01

2241

3698

Contents

2

General DataApplications Page 3Type Key Page 4Codes for Stuffing Box Page 4Codesfor Mechanical Shaft Seal Page 4Configuration Number Key Page 5Selection of Pumps for Various Liquids Page 6Stuffing Boxes Page 8Mechanical Shaft Seals Page 9DIN - ISO correspondance Page 10Operating Range Page 10Sectional Drawing Page 11Pump Material List Page 14Motors Page 15Spare Parts Page 15

Technical Data2-pole Electrical Data Page 164-pole Electrical Data Page 176-pole Electrical Data Page 18Pump Dimensions and Weights Page 19Unit Dimensions and Weights Page 22Quotation Drawings Page 28

Performance RangesCurve Conditions Page 32Performance Tests Page 32Certificates Page 32Performance Range 2900 min-1 Page 33Performance Range 1450 min-1 Page 34Performance Range 970 min-1 Page 35

Performance Curves 2900 min-1NKG 32-xxx Page 36NKG 40-xxx Page 39NKG 50-xxx Page 43NKG 65-xxx Page 47NKG 80-xxx Page 52NKG 100-xxx Page 56NKG 125-250 Page 59NKG 150-315 Page 60

Performance Curves 1450 min-1NKG 32-xxx Page 61NKG 40-xxx Page 64NKG 50-xxx Page 68NKG 65-xxx Page 72NKG 80-xxx Page 77NKG 100-xxx Page 82NKG 125-xxx Page 86NKG 150-xxx Page 89NKG 200-xxx Page 91NKG 250-xxx Page 93NKG 300-360 Page 97

Performance Curves 970 min-1NKG 100-200 Page 98NKG 125-250 Page 99NKG 150-315 Page 100NKG 200-xxx Page 101NKG 250-xxx Page 103NKG 300-360 Page 107

3General Data NKG

ApplicationsThe pump is suitable for the pumping of thin, clean andnon-aggressive liquids without solid particles or fibresin: District heating Water supply Airconditioning Cooling plants Industry Fire fighting Environment engineering

Operating Conditions

PumpNon-self-priming single-stage centrifugal volute pumpwith axial suction port, radial discharge port and hori-zontal shaft components.The NKG pumps have dimensions and nominalperformances according to DIN 24 256 (16 bar). Typesoutside of the official DIN-norm (NKG 200 and up) willbe called "oversize". Dimensions can differ from othersuppliers.The suction and discharge flanges are according to DIN2501 PN 16. All pumps are dynamically balancedaccording to ISO 1940 class 6.3 and impellers arehydraulically balanced.Pump and motor are mounted on a common baseplatein accordance with DIN 24 259 in all-welded steel.Oversizes have profile base frames.Due to the pump design the complete bearing assemblyincluding impeller and shaft seal can be dismantledwithout removing the volute casing from the pipesystem (back-pull-out system ).

Flexible CouplingStandard version or a spacer coupling which allows themotor to remain in place during the abovementioneddismantling to avoid subsequent alignment.If the pump housing, motor or the entire unit is moved,alignment is always neccessary.

Bearing Assembly with ShaftThe bearing assembly includes two sturdy antifrictionbearings lubricated for life. Oversize pumps with shaftd5=55mm however, have open bearings with greasenipples.A thrower on the shaft prevents liquid from entering thebearing housing.In stuffing box versions the shaft is protected by a stain-less steel sleeve at the shaft seal.All the NKG pumps according to DIN 24 256 arecovered by only four sizes of shaft, shaft seal and bear-ings, and the oversizes by an additional three sizes.Due to the ample sizes of the bearings and shaft thepump can be driven by a belt drive, belt variator or adiesel engine, if required.

Shaft SealThe standard version is provided with a mechanicalBurgmann shaft seal according to DIN 24 960,Grundfos type AQAE. Depending on pumped liquid andoperating conditions other types and stuffing boxes areavailable.Back-to-back double mechanical shaft seals, and"quench", are available for all variants on request.

MotorThe motor is a totally enclosed, fan-cooled squirrel-cage Grundfos MMG motor dimensioned to IEC publi-cation 72 and complying with IEC 34 and DIN 42 950.

NKG units with 60 Hz motors and NKE units with MGEmotors are also available, but are described in seperatebooklets.Other brands of motors can be mounted on request.

Surface TreatmentMinimum 40 m black water based laquer.Various RAL colors are available on request.

Flow Max. 2000 m3/h.Head Max. 150 m.LiquidTemperature 40C up to +160C.

OperatingPressure

Max. 16 bar. *)Operating pressure = inlet pressure +pressure against a closed valve (Q = 0).

InletPressure

Max. 9 bar.Max. 7 bar for 400 mm impellers or bigger.

*) Optional executions for 10 or 25 bar on request.

TM01

1666

5097

3

Spacer coupling

Mounting Designation B3 (IM 1001)Enclosure Class IP 55Insulation Class F (100 C)Ambient Temperature Max. 40CVoltages, 50/(60) Hz 3 x 220-240/380-415 V,

(3 x 220-275/380-480 V),3 x 380-415 V,(3 x 380-480 V)

Thermistor TP 211 acc. DIN 44082when P2 3 kW

4General Data NKG

Type KeyFor units without motor the motor data are left out, andfor bare shaft pumps the coupling and motor data areleft out.

The example describes an NKG 100-200 with 198 mmimpeller, in cast iron with neck rings, with BAQE shaftseal, standard coupling and a 4-pole 5.5 kW motor.*) Oversize pumps are not available in GG 25 cast iron.Specification of pump materials see Pump Material Liston page 14.

Codes for Stuffing Box

Codesfor Mechanical Shaft Seal

Example NKG100-200 /198 /AW /BAQE /1 /5.5 /4Type rangeNominal diameter ofdischarge portNominal impeller diameterActual impeller diameterCode for materials:

A(01) = Cast iron GG 25 *)B(03) = GG 25 with bronze impeller *)C(04) = Ductile cast iron GGG 40G = GGG 40 with bronze impellerZ(07) = All bronze

W = Neck ring(s)Code for shaft sealCoupling type

1 = standard2 = spacer

Motor power in kW2, 4 or 6 pole motor

Position Code Short Description of Seal1 S Packing type stuffing box

Position Code Cooling

2N Uncooled stuffing boxK Cooled stuffing box

Position Code Barrier fluid

3E With internal liquidF With external liquidO Without barrier fluid

Position Code Short Description of Seal

1

A O-ring seal with fixed seal driverB Rubber bellows sealC O-ring seal with spring as seal driverD Balanced O-ring seal

G Rubber bellows seal with reducedseal faces

M Metal bellows sealX Other

Position Code Material

2 & 3

A Metal-impregnated carbonB Synthetic-resin-impregnated carbonC Other types of carbonS Chromium steelU Tungsten carbideQ Silicon carbideV Aluminium oxide (ceramic)X Other types of ceramic/carbide

Position Code Material

4

P Nitrile (NBR)S Silicone rubberT PTFEE EPDMV FKMM PTFE-coated O-ring

5General Data NKG

Configuration Number KeyEach of the 8 digits in the configuration numberdescribes one or more possibilities of variation in theconstruction of the pump (unit).The number is configured from the tables shown below:

Example: The fourth digit determins if the pump is a NKor NKG pump as well as which material version.

Nominal Code Code NKG Pump Material Code CouplingImpeller Diameter [mm] F Cast iron GG25 0 Without coupling *)125 1 G GG25 w. Bronze impeller 1 Standard160 2 H Ductile cast iron GGG40 2 Spacer200 3 I GGG40 w. Bronze impeller *) Bare shaft pump250 4 J All bronze315 5 All models have neck ring(s)360 7 Code P2 kW max.400 8 0 Bare shaft pump500 9 1 0.37310 A 2 0.55330 B 3 0.75

Code Single Shaft Seal 4 1.11 BAQE *) 5 1.53 DAQM *) 6 2.2

Pump Type NK(G) Code 5 BQQV *) 7 332 1 7 BAQV *) 8 440 2 8 AQAE 9 5.550 3 9 AQAV *) A 7.565 0-55 kW 4 A SNE *) B 1180 0-55 kW 5 B SNO *) C 15100 0-90 kW 6 C SNF *) D 18.5125 0-90 kW 7 D SKO *) E 22150 0-188 kW 8 E GQQE *) F 30

F GQQV *) G 3765 56-200 kW *) A G BQQE *) H 4580 56-200 kW *) B H AQQE *) K 55100 91-200 kW *) C I AQQV *) L 75125 91-188 kW *) D J DQQE *) M 90200 0-300 kW *) E K DQQV *) N 110250 0-300 kW *) F Code Double Shaft Seal P 132300 0-300 kW *) G M BAQE *) Q 160150 189-495 kW *) H N DAQM *) R 200*) Oversize, not available in

cast iron GG 25R AQAE *) S 250V AQQE *) T 315W AQQV *) U 355

*) Optional

Code Voltage Pole0 Exclusive motor1 3X220-240/380-415V 50 Hz, 3X220-275/380-480V 60 Hz 22 3X380-415V 50 Hz, 3X380-480V 60 Hz 23 3X220-240/380-415V 50 Hz, 3X220-275/380-480V 60 Hz 44 3X380-415V 50 Hz, 3X380-480V 60 Hz 4

Configuration number K E 8 F 1 1 P 4 5 MGE-motor 3X380-415V 50/60 Hz 2Bare shaft pump 0 0 0 6 MGE-motor 3X380-415V 50/60 Hz 4Unit excl. motor 0 7 3X380-415V 50 Hz, 3X380-480V 60 Hz 6Complete unit

6General Data NKGSelection of Pumps for Various Liquids

Pumped Liquids

Max. limitssolution,

temperature,pressure

Materials and Shaft Seal

Notes

A (01)Cast Iron

B (03)BronzeImpeller

C (04)Sph. Graphite

Cast Iron

Z (07)All Bronze

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

Ammonia waterMax. 10%, 40C,16/12 bar SNF

BAQE Metals in pumpmust be all-ferrousDouble seal16/16 bar AQAE

Airconditioning0C to 30C,10/7 bar SNE/SNO

BQQE

16/16 bar DAQE

Brackish waterMax. 40C,10/7 bar SNE/SNO

BQQVHastelloy

16/16 bar DQQV

Brake fluidMax. 40C,16/12 bar SNE/SNO

BAQE

16/16 bar AQAE

Fire fighting water16/12 bar

SNE/SNOBAQE

16/16 bar AQAE

Fixative salt(sodium thiosulphate)

Max. 25C,16/12 bar SNE/SNO

BAQV Metals in pumpmust be all-ferrous

16/16 bar AQAV

Glycol-water mix-20C to 80C,16/12 bar SNE/SNO

BAQE

If oil depositschoose Viton

16/16 bar AQAE

Glycol-water mixwith additives

0C to 80C,10/7 bar SNE/SNO BQQE

-20C to 0C,10/7 bar SNE/SNO GQQE

-40C to -20C,16/12 bar SNE/SNO AQQE

Salt brine

Max. 15%,0C, 16/12 bar SNE/SNO BAQE Double seal

Max. 15%,-30 to 0C,10/7 bar SNE/SNO

AQQE

16/16 bar DQQV

Other coolants -40C to -20C,16 bar SNE/SNO AQAE Contact Grundfos

District heating water

Max. 120C,16 bar SNE/SNO BAQE

Nominal shaftdiam. 42mm

Max. 120C,12 bar SNE/SNO BAQE Nominal shaft

diam. 48mmMax. 120C,16 bar SNE/SNO AQAE

120C to 140C,16 bar SNE/SNO AQAE

140C to 160C,16 bar SKO DAQM

Cooling,Contact Grundfos

Milk of lime(calcium hydroxide)

Max. 10%,25C,10/7 bar SNF

BQQE Flush before longstandstill periods

16/16 bar DQQE

7General Data NKG16/16 bar, 16/12 bar and 10/7 barThe first figure is maximum pressure for nominal shaftdiameters 42mm.The second for nominal shaft diameters 48mm.Nominal shaft diameter is the diameter of the pumpshaft end (dimension d5 on pages 19 - 21).

SNE/SNOSNE for inlet pressure < 4 barSNO for inlet pressure > 4 bar.

HastelloyHastelloy shaft seal metal parts for bronze pumps.

Condensate0C to 100C,16/12 bar SNE/SNO

BAQE

16/16 bar AQAE

Cooling water0C to 120C,16/12 bar SNE/SNO

BAQE

16/16 bar AQAE

Sea water

Max. 40C,10/7 bar SNE/SNO

BQQVNorth Sea,Baltic Seawater.

Hast-elloy

16/16 bar DQQVMax. 25C,10/7 bar SNE/SNO

BQQV

16/16 bar DQQV

Soda lye (P3)Max. 20%,100C, 10/7 bar SNE/SNO

BQQE

16/16 bar DQQE

Fuel oil, diesel oil16/12 bar BAQV16/16 bar AQAV

Oil-water emulsion16/12 bar

SNE/SNOBAQV

16/16 bar AQAV

Clean water16/12 bar

SNE/SNOBAQE

16/16 bar AQAV

Raw water10/7 bar

SNE/SNOBQQV

16/16 bar DQQVSwimming pool water(fresh water)

16/12 barSNE/SNO

BAQV16/16 bar AQAV

Soda(sodium carbonate)

Saturatedsolution, 25C,10/7 bar SNE/SNO

BQQEDouble seal

16/16 bar DQQEWater fromstorage reservoirs

10/7 barSNE/SNO

BQQE16/16 bar DQQE

Partiallydemineralized water

Max. 100C,16/12 bar SNE/SNO

BAQE

16/16 bar AQAE

Drinking waterMax. 100C,16/12 bar SNE/SNO

BAQE

16/16 bar AQAE

Contaminated waterMax. 100C,10/7 bar SNF

BQQVContact Grundfos

16/16 bar DQQVFor liquids not mentioned in this table please contact Grundfos.

Pumped Liquids

Max. limitssolution,

temperature,pressure

Materials and Shaft Seal

Notes

A (01)Cast Iron

B (03)BronzeImpeller

C (04)Sph. Graphite

Cast Iron

Z (07)All Bronze

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

StuffingBox

Mech.Seal

Grundfosliterature-417.pdfGeneral DataApplicationsType KeyCodes for Stuffing BoxCodesfor Mechanical Shaft SealConfiguration Number KeySelection of Pumps for Various LiquidsStuffing BoxesMechanical Shaft SealsDIN - ISO correspondanceOperating RangeSectional DrawingPump Material ListMotorsSpare Parts

Technical Data2-pole Electrical Data4-pole Electrical Data6-pole Electrical DataPump Dimensions and WeightsUnit Dimensions and WeightsQuotation Drawings

Performance RangesCurve ConditionsPerformance TestsCertificatesPerformance Range 2900 min-1Performance Range 1450 min-1Performance Range 970 min-1

Performance Curves 2900 min-1NKG 32-xxxNKG 40-xxxNKG 50-xxxNKG 65-xxxNKG 80-xxxNKG 100-xxxNKG 125-250NKG 150-315

Performance Curves 1450 min-1NKG 32-xxxNKG 40-xxxNKG 50-xxxNKG 65-xxxNKG 80-xxxNKG 100-xxxNKG 125-xxxNKG 150-xxxNKG 200-xxxNKG 250-xxxNKG 300-360

Performance Curves 970 min-1NKG 100-200NKG 125-250NKG 150-315NKG 200-xxxNKG 250-xxxNKG 300-360