Grundfos CR, 3, CRI, 5, 10 Installation And Operating Instructions Manual

GRUNDFOS INSTRUCTIONS

CR, CRI, CRN 1s, 1, 3, 5, 10, 15, 20
CR, CRN 32, 45, 64, 90, 120, 150

Double seal (back-to-back)

Installation and operating instructions

English (GB) Installation and operating instructions

Caution

Note

Caution

English (GB)

Original installation and operating instructions.

CONTENTS

1. Symbols used in thi s do cumen t

2. General informati on

3. Product description

4. Applications

5. Maximum liquid pressure and temperature

6. Barrier fluid connections

7. Pump with pressure intensifier

7.1 Components of pressure intensifier

7.2 Dimensions of pump with pressure intensifier

8. Pump with dosing pump

8.1 Dimensions of pump with dosing pump

9. Startup

9.1 Pump with pressure intensifier

9.2 Pump with dosing pump

10. Maintenance

11. Operation

11.1 Frost protection

12. Disposal

Warning
Prior to installation, read these installation and

operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.

1. Symbols used in this document

Warning
If these safety instructions are not observed,

it may result in personal injury.

If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.

Notes or instructions that make the job easier
and ensure safe operation.

Page

2. General information

These installation and operating instructions are a supplement to
installation and operating instructions for standard CR, CRI, CRN
pumps, publication No 96462123, and for CRN-SF pumps,
publication No 96530119.

2
2

3. Product description

2

This type of double seal consists of two shaft seals mounted in a

2

"back-to-back" arrangement in a separate seal chamber.

2

The pressure in the seal chamber is higher than the pump

3

pressure.

4

The double seal arrangement with pressurised seal chamber

4

prevents the pumped liquid from leaking to the environment via

4

the shaft seal.
The pressure in the seal chamber can be generated in three

4

ways:

4

• by means of a pressure intensifier (section 9.1)

5

5

• by means of a dosing pump (section 9.2)

6

• by means of an already existing system.

7
7

4. Applications

7

The shaft seal is available for the following Grundfos pumps:

7

Pump

CR 1sCR 1CR 3CR 5CR 10CR 15CR 20CR 32CR 45CR 64CR 90CR

type

CR 
CRI 
CRN 

This type of shaft seal is the optimum solution when handling
abrasive or sticky liquids which would either wear out, damage or
block a mechanical shaft seal.

Recommended for applications involving toxic, aggressive or
flammable liquids, the seal shaft protects the surrounding
environment and the people working in the vicinity of the pump.

If the shaft seal is used in applications where
special safety precautions must be observed due
to hazardous liquids, the customer bears full
responsibility!

5. Maximum liquid pressure and temperature

Due to the shaft seal design, the pressure in the seal chamber
must not exceed 25 bar. The pressure of the barrier fluid must
always be higher than the pressure of the pumped liquid.

The maximum temperature of the barrier fluid depends on the
rubber material of the shaft seal.

120CR150

Shaft seal Maximum temperature [°C]

EPDM +120

FKM +90

FFKM +120

FXM +120

2

6. Barrier fluid connections

Sensor

Inlet 1/2"

Outlet 3/8"

C/D

A

E

A

C/D

E

Sensor

Inlet 1/2"

Outlet 3/8"

C/D

A

E

A

C/D

E

Inlet 1/2"

Sensor

A

A

C/D

E

E

Outlet 3/8"

C/D

Key to the letters in the drawings:
Pos. A = pumped liquid.
Pos. C/D and E = barrier fluid.
Figures 1, 2 and 3 show where to fit a sensor (pos. A),

if retrofitted.

English (GB)

Fig. 1 Seal chamber CR, CRI, CRN 1s, 1, 3, 5

Fig. 2 Seal chamber CR, CRI, CRN 10, 15, 20

TM04 3225 3908TM04 3226 3908

Fig. 3 Seal chamber CR, CRN 32, 45, 64, 90, 120, 150

TM04 4080 0909

3

7. Pump with pressure intensifier

Pressure

gauge

Pressure

intensifier

Seal chamber

CR, CRI, CRN pump

5

4

3
2
1

7

6

9

8

a

b

c

Dosing pump

Barrier fluid

English (GB)

Fig. 4 Pump with pressure intensifier

7.1 Components of pressure intensifier

7.2 Dimensions of pump with pressure intensifier

TM01 4455 0399TM03 8299 1007

TM01 4459 0399

Fig. 6 Pump with pressure intensifier

Pump type

CR, CRI, CRN 1s, 1, 3, 5 297 108 128
CR, CRI, CRN 10, 15, 20 234 90 140
CR, CRN 32 342 185 155
CR, CRN 45 349 215 164
CR, CRN 64 349 141 164
CR, CRN 90 355 159 170
CR, CRN 120, 150 355 111 170

The dimension b is the additional height compared to the
standard pump.

a

[mm]

b

[mm]

c

[mm]

8. Pump with dosing pump

Fig. 5 Components of pressure intensifier

Pos. Designation

1 Pressure intensifier
2Piston
3 Diaphragm
4 Non-return valve
5 Relief valve
6 Vent screw, Rp 1/8
7 Spring for piston
8 Pressure gauge (barrier fluid)
9 Pressure gauge (pumped liquid)

4

Fig. 7 Pump with dosing pump

TM01 9099 1701

8.1 Dimensions of pump with dosing pum p

Pump type

CR, CRI, CRN 1s, 1, 3, 5 108
CR, CRI, CRN 10, 15, 20 90
CR, CRN 32 185
CR, CRN 45 215
CR, CRN 64 141
CR, CRN 90 159
CR, CRN 120, 150 111

Additional height of seal chamber

[mm]

9. Startup

1,5 - 4 bar

9.1 Pump with pressure intensifier

Warning
Pay attention to the orientation of the vent holes, and take care to ensure that the escaping liquid does not cause

personal injury or damage to the motor or other components.
When handling hot or hazardous liquids, special attention should be paid to the risk of personal injury.

When pumping flammable liquids, beware of static discharges. The funnel, for instance, should be earthed!

Illustration Step Action

English (GB)

Operation with positive inlet pressure

• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.

• Close the isolating valve on the discharge side.

• Open the isolating valve on the inlet side.

• Slowly fill the pump with the liquid to be pumped.
When the liquid starts running out of the vent hole, immediately
close the vent screw.

1

Operation with suction lift

• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.

• Close the isolating valve on the discharge side.

• Fill the pump and the inlet pipe with the liquid to be pumped using a
funnel.

• When the liquid starts running out of the vent hole, immediately
close the vent screw.

TM02 2607 4601

TM02 2608 4601

Note: A non-return valve must be fitted to the inlet pipe.
Filling the seal chamber

• Fill the intensifier and the seal chamber with barrier fluid, and

connect the barrier fluid supply pipe to the unused inlet of the
intensifier (pos. 4, fig. 5). The pressure in the seal chamber must
always be 1.5 to 4 bar higher than the pump pressure when the pump
is not operating.

2

p

= ps* + 1.5 to 4 bar.

f

p

= To be read on the pressure gauge on the intensifier (pos. 8, fig. 5).

f

p

= To be read on the pressure gauge in the connection pipe

s

(pos. 9, fig. 5) between intensifier and pump.

* p

= inlet pressure when the pump is not operating; must always be

s

0.1 to 5 bar higher than the atmospheric pressure.

Venting

During filling, the seal chamber and the intensifier must be vented:

• Use the vent screw at the top of the seal chamber (pos. C/D, fig. 1, 2

or 3) and the vent screw at the top of the intensifier (pos. 6, fig. 5).

3

TM02 2609 4601

TM02 2610 4601

TM02 2611 4610

Disconnecting the barrier fluid supply pipe

• Disconnect the barrier fluid supply pipe from the intensifier.

4

Starting up the pump

• See also the installation and operating instructions for standard CR,

CRI, CRN pumps.

• Start the pump, and check the direction of rotation.

See the correct direction of rotation on the motor fan cover.

5

• After a few minutes, vent the pump again by means of the vent screw

(pos. A, fig. 1, 2 or 3).

5

9.2 Pump with dosing pump

PS

PS

1,5 - 2 bar

PS

PS

PS

English (GB)

Warning
Pay attention to the orientation of the vent holes, and take care to ensure that the escaping liquid does not cause

personal injury or damage to the motor or other components.
When handling hot or hazardous liquids, special attention should be paid to the risk of personal injury.

When pumping flammable liquids, beware of static discharges. The funnel, for instance, should be earthed!

Illustration Step Action

Connecting the barrier fluid supply pipe

• Connect one end to the seal chamber (pos. E, fig. 1, 2 or 3).

• Connect the other end to the outlet of the dosing pump.

1

TM02 2612 4601

Recommended pressure

• Set the start pressure of the dosing pump to a pressure 1.5 to 2 bar
above the highest pressure the pump can deliver.
(P

2

TM02 2613 4601

pump

Filling and venting the seal chamber

• Start the dosing pump.

• Fill and vent the seal chamber by means of the vent screw at the top
of the seal chamber (pos. C/D, fig. 1, 2 or 3).

3

The dosing pump will stop automatically when the pressure set in
step 2 has been reached.

+ P

inlet

+ P

1.5 - 2.0

< P

dosing max.

)

TM02 2614 4601

Operation with positive inlet pressure

• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.

• Close the isolating valve on the discharge side.

• Open the isolating valve on the inlet side.

• Slowly fill the pump with the liquid to be pumped.
When the liquid starts running out of the vent hole, immediately close
the vent screw.

4

Operation with suction lift

• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.

• Close the isolating valve on the discharge side.

• Fill the pump and the inlet pipe with the liquid to be pumped using a
funnel.

• When the liquid starts running out of the vent hole, immediately close
the vent screw.

TM02 2615 4601

Note: A non-return valve must be fitted to the inlet pipe.

Starting up the pump

• See also the installation and operating instructions for standard CR,
CRI, CRN pumps.

• Open the isolating valve on the discharge side.

• Start the pump, and check the direction of rotation.

5

See the correct direction of rotation on the motor fan cover.

• After a few minutes, vent the pump again by means of the air vent
screw (pos. A, fig. 1, 2 or 3).

TM02 2616 4601

6

10. Maintenance

Note

See the installation and operating instructions for standard CR,
CRI, CRN pumps.

Pressure intensifier

The pressure intensifier is maintenance-free.

Dosing pump

See the installation and operating instructions for the dosing
pump.

11. Operation

To ensure optimum function and performance, check the pressure
regularly.

Pressure intensifier

The pressure difference between the two pressure gauges (seal
chamber and pump) must be between 1 and 1.5 bar.
This indicates that the seal chamber contains sufficient barrier
fluid.

Dosing pump

The pressure of the barrier fluid must always be 1.5 to 2 bar
higher than the pressure of the pumped liquid. This is
automatically checked by the pressure switch/ transmitter fitted
together with the dosing pump.

A very small quantity of the barrier fluid, i.e. less
than 10 ml/24 operating hours, will always flow
into the pumped liquid.

English (GB)

11.1 Frost protection

For general guidelines on frost protection of the pump, see the
installation and operating instructions for standard CR, CRI, CRN
pumps.

Seal chamber

Drain the seal chamber by slackening the lower plug
(pos. E, fig. 1, 2 or 3).

Pressure intensifier

Replace the barrier fluid by antifreeze liquid.

Dosing pump

For frost protection, see the installation and operating instructions
for the dosing pump.

Warnin g
If the pumped liquid is hazardous to health, take

special care when draining the pump.
Local safety regulations must be observed.

12. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest Grundfos company
or service workshop.

Subject to alterations.

7

8

Argentina

Bombas GRUNDFOS de Argentina S.A.
Ruta Panamericana km. 37.500 Centro
Industrial Garin
1619 Garín Pcia. de B.A.
Phone: [phone]
Telefax: [phone]

Australia

GRUNDFOS Pumps Pty. Ltd.
P.O. Box 2040
Regency Park
South Australia 5942
Phone: [phone]
Telefax: [phone]

Austria

GRUNDFOS Pumpen Vertrieb Ges.m.b.H.
Grundfosstraße 2
A-5082 Grödig/Salzburg
Tel.: [phone]
Telefax: [phone]

Belgium

N.V. GRUNDFOS Bellux S.A.
Boomsesteenweg 81-83
B-2630 Aartselaar
Tél.: [phone]
Télécopie: [phone]

Belarus

Представительство ГРУНДФОС в
Минске
220125, Минск
ул. Шафарнянская, 11, оф. 56, БЦ
«Порт»
Тел.: [phone]
Факс: [phone]

E-mail: [e-mail]

Bosna and Herzegovina

GRUNDFOS Sarajevo
Zmaja od Bosne 7-7A,
BH-71000 Sarajevo
Phone: [phone]
Telefax: [phone]
www.ba.grundfos.com
e-mail: [e-mail]

Brazil

BOMBAS GRUNDFOS DO BRASIL
Av. Humberto de Alencar Castelo Branco,
630
CEP 09850 - 300
São Bernardo do Campo - SP
Phone: [phone]
Telefax: [phone]

Bulgaria

Grundfos Bulgaria EOOD
Slatina District
Iztochna Tangenta street no. 100
BG - 1592 Sofia
Tel. [phone]
Fax. [phone]
email: [e-mail]

Canada

GRUNDFOS Canada Inc.
2941 Brighton Road
Oakville, Ontario
L6H 6C9
Phone: [phone]
Telefax: [phone]

China

GRUNDFOS Pumps (Shanghai) Co. Ltd.
50/F Maxdo Center No. 8 XingYi Rd.
Hongqiao development Zone
Shanghai 200336
PRC
Phone: [phone]
Telefax: [phone]

Croatia

GRUNDFOS CROATIA d.o.o.
Buzinski prilaz 38, Buzin
HR-10010 Zagreb
Phone: [phone]
Telefax: [phone]
www.hr.grundfos.com

Czech Republic

GRUNDFOS s.r.o.
Čajkovského 21
779 00 Olomouc
Phone: [phone]
Telefax: [phone]

Denmark

GRUNDFOS DK A/S
Martin Bachs Vej 3
DK-8850 Bjerringbro
Tlf.: [phone]
Telefax: [phone]
E-mail: [e-mail]
www.grundfos.com/DK

Estonia

GRUNDFOS Pumps Eesti OÜ
Peterburi tee 92G
11415 Tallinn
Tel: + 372 606 1690
Fax: + 372 606 1691

Finland

OY GRUNDFOS Pumput AB
Mestarintie 11
FIN-01730 Vantaa
Phone: [phone]
Telefax: [phone]

France

Pompes GRUNDFOS Distribution S.A.
Parc d’Activités de Chesnes
57, rue de Malacombe
F-38290 St. Quentin Fallavier (Lyon)
Tél.: [phone]
Télécopie: [phone]

Germany

GRUNDFOS GMBH
Schlüterstr. 33
40699 Erkrath
Tel.: [phone]
Telefax: [phone]
e-mail: [e-mail]
Service in Deutschland:
e-mail: [e-mail]

HILGE GmbH & Co. KG
Hilgestrasse 37-47
55292 Bodenheim/Rhein
Germany
Tel.: [phone]
Telefax: [phone]
e-mail: [e-mail]

Greece

GRUNDFOS Hellas A.E.B.E.
20th km. Athinon-Markopoulou Av.
P.O. B o x 7 1
GR-19002 Peania
Phone: [phone]
Telefax: +0030-210-66 46 273

Hong Kong

GRUNDFOS Pumps (Hong Kong) Ltd.
Unit 1, Ground floor
Siu Wai Industrial Centre
29-33 Wing Hong Street &
68 King Lam Street, Cheung Sha Wan
Kowloon
Phone: [phone]
Telefax: [phone]

Hungary

GRUNDFOS Hungária Kft.
Park u. 8
H-2045 Törökbálint,
Phone: [phone]
Telefax: [phone]

India

GRUNDFOS Pumps India Private Limited
118 Old Mahabalipuram Road
Thoraipakkam
Chennai 600 096
Phone: [phone]

Indonesia

PT GRUNDFOS Pompa
Jl. Rawa Sumur III, Blok III / CC-1
Kawasan Industri, Pulogadung
Jakarta 13930
Phone: [phone]
Telefax: [phone] / 460 6901

Ireland

GRUNDFOS (Ireland) Ltd.
Unit A, Merrywell Business Park
Ballymount Road Lower
Dublin 12
Phone: [phone]
Telefax: [phone]

Italy

GRUNDFOS Pompe Italia S.r.l.
Via Gran Sasso 4
I-20060 Truccazzano (Milano)
Tel.: [phone]
Telefax: [phone] / 95838461

Japan

GRUNDFOS Pumps K.K.
Gotanda Metalion Bldg., 5F,
5-21-15, Higashi-gotanda
Shiagawa-ku, Tokyo
141-0022 Japan
Phone: [phone]
Telefax: [phone]

Korea

GRUNDFOS Pumps Korea Ltd.
6th Floor, Aju Building 679-5
Yeoksam-dong, Kangnam-ku, 135-916
Seoul, Korea
Phone: [phone]
Telefax: [phone]

Latvia

SIA GRUNDFOS Pumps Latvia
Deglava biznesa centrs
Augusta Deglava ielā 60, LV-1035, Rīga,
Tālr.: + 371 714 9640, 7 149 641
Fakss: + 371 914 9646

Lithuania

GRUNDFOS Pumps UAB
Smolensko g. 6
LT-03201 Vilnius
Tel: + 370 52 395 430
Fax: + 370 52 395 431

Malaysia

GRUNDFOS Pumps Sdn. Bhd.
7 Jalan Peguam U1/25
Glenmarie Industrial Park
40150 Shah Alam
Selangor
Phone: [phone]
Telefax: [phone]

Mexico

Bombas GRUNDFOS de México S.A. de
C.V.
Boulevard TLC No. 15
Parque Industrial Stiva Aeropuerto
Apodaca, N.L. 66600
Phone: [phone]
Telefax: [phone]

Netherlands

GRUNDFOS Netherlands
Velu we zo om 35
1326 AE Almere
Postbus 22015
1302 CA ALMERE
Tel.: [phone]
Telefax: [phone]
E-mail: [e-mail]

New Zealand

GRUNDFOS Pumps NZ Ltd.
17 Beatrice Tinsley Crescent
North Harbour Industrial Estate
Albany, Auckland
Phone: [phone]
Telefax: [phone]

Norway

GRUNDFOS Pumper A/S
Strømsveien 344
Postboks 235, Leirdal
N-1011 Oslo
Tlf.: [phone]
Telefax: [phone]

Poland

GRUNDFOS Pompy Sp. z o.o.
ul. Klonowa 23
Baranowo k. Poznania
PL-62-081 Przeźmierowo
Tel: [phone]
Fax: [phone]

Portugal

Bombas GRUNDFOS Portugal, S.A.
Rua Calvet de Magalhães, 241
Apartado 1079
P-2770-153 Paço de Arcos
Tel.: [phone]
Telefax: [phone]

Romania

GRUNDFOS Pompe România SRL
Bd. Biruintei, nr 103
Pantelimon county Ilfov
Phone: [phone]
Telefax: [phone]
E-mail: [e-mail]

Russia

ООО Грундф ос Россия
109544, г. Москва, ул. Школьная, 39-41,

стр. 1
Тел. [phone] [phone]
Факс [phone]

E-mail [e-mail]

Serbia

Grundfos Srbija d.o.o.
Omladinskih brigada 90b
11070 Novi Beograd
Phone: [phone]
Telefax: [phone]
www.rs.grundfos.com

Singapore

GRUNDFOS (Singapore) Pte. Ltd.
25 Jalan Tukang
Singapore 619264
Phone: [phone]
Telefax: [phone]

Slovakia

GRUNDFOS s.r.o.
Prievozská 4D
821 09 BRATISLAVA
Phona: [phone]
sk.grundfos.com

Slovenia

GRUNDFOS d.o.o.
Šlandrova 8b, SI-1231 Ljubljana-Črnuče
Phone: [phone]
Telefax: [phone]
E-mail: [e-mail]

South Africa

GRUNDFOS (PTY) LTD
Corner Mountjoy and George Allen Roads
Wilbart Ext. 2
Bedfordview 2008
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

Spain

Bombas GRUNDFOS España S.A.
Camino de la Fuentecilla, s/n
E-28110 Algete (Madrid)
Tel.: [phone]
Telefax: [phone]

Sweden

GRUNDFOS AB
Box 333 (Lunnagårdsgatan 6)
431 24 Mölndal
Tel.: [phone]
Telefax: [phone]

Switzerland

GRUNDFOS Pumpen AG
Bruggacherstrasse 10
CH-8117 Fällanden/ZH
Tel.: [phone]
Telefax: [phone]

Taiwan

GRUNDFOS Pumps (Taiwan) Ltd.
7 Floor, 219 Min-Chuan Road
Taichung, Taiwan, R.O.C.
Phone: [phone]
Telefax: [phone]

Thailand

GRUNDFOS (Thailand) Ltd.
92 Chaloem Phrakiat Rama 9 Road,
Dokmai, Pravej, Bangkok 10250
Phone: [phone]
Telefax: [phone]

Turkey

GRUNDFOS POMPA San. ve Tic. Ltd. Sti.
Gebze Organize Sanayi Bölgesi
Ihsan dede Caddesi,

2. yol 200. Sokak No. 204
41490 Gebze/ Kocaeli
Phone: +90 - 262-679 7979
Telefax: +90 - 262-679 7905
E-mail: [e-mail]

Ukraine

Бізнес Центр Європа
Столичне шосе, 103
м. Київ, 03131, Україна
Телефон : [phone]
Факс.: [phone]

E-mail: [e-mail]

United Arab Emirates

GRUNDFOS Gulf Distribution
P.O. Box 16768
Jebel Ali Free Zone
Dubai
Phone: [phone]
Telefax: [phone]

United Kingdom

GRUNDFOS Pumps Ltd.
Grovebury Road
Leighton Buzzard/Beds. LU7 4TL
Phone: [phone]
Telefax: [phone]

U.S.A.

GRUNDFOS Pumps Corporation
17100 West 118th Terrace
Olathe, Kansas 66061
Phone: [phone]
Telefax: [phone]

Uzbekistan

Grundfos Tashkent, Uzbekistan The Repre­sentative Office of Grundfos Kazakhstan in
Uzbekistan
38a, Oybek street, Tashkent
Телефон: [phone] / 71 150
3291
Факс: [phone]

Addresses Revised 21.05.2014

Grundfos companies

96477556 0114

ECM: 1127681

www.grundfos.com

The name Grundfos, the Grundfos logo, and be think innovate are registered trademarks owned by Grundfos Holding A/S or Grundfos A/S, Denmark. All rights reserved worldwide. © Copyright Grundfos Holding A/S