BS EN 03661-1993 (1999)
Content
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
BRITISH STANDARD
End-suction centrifugal
pumps —
Baseplate and
installation dimensions
The European Standard EN 23661:1993 has the status of a
British Standard
UDC 621.671
BS EN
23661:1993
ISO 3661:1977
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
BS EN 23661:1993
Cooperating organizations
The European Committee for Standardization (CEN), under whose supervision
this European Standard was prepared, comprises the national standards
organizations of the following countries:
Austria
Oesterreichisches Normungsinstitut
Belgium
Institut belge de normalisation
Denmark
Dansk Standardiseringsraad
Finland
Suomen Standardisoimisliito, r.y.
France
Association française de normalisation
Germany
Deutsches Institut für Normung e.V.
Greece
Hellenic Organization for Standardization
Iceland
Technological Institute of Iceland
Ireland
National Standards Authority of Ireland
Italy
Ente Nazionale Italiano di Unificazione
Luxembourg
Inspection du Travail et des Mines
Netherlands
Nederlands Normalisatie-instituut
Norway
Norges Standardiseringsforbund
Portugal
Instituto Portuguès da Qualidade
Spain
Asociación Española de Normalización y Certificación
Sweden
Standardiseringskommissionen i Sverige
Switzerland
Association suisse de normalisation
United Kingdom
British Standards Institution
This British Standard, having
been prepared under the
direction of the Machinery and
Components Standards Policy
Committee, was published
under the authority of the
Standards Board and
comes into effect on
15 September 1993
Amendments issued since publication
© BSI 10-1999
Amd. No.
The following BSI references
relate to the work on this
standard:
Committee reference MCE/6
Special announcement in
BSI News December 1992
ISBN 0 580 21909 7
Date
Comments
BS EN 23661:1993
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
Contents
Page
Cooperating organizations
Inside front cover
National foreword
ii
Foreword
2
1
Scope
3
2
Field of application
3
3
References
3
4
Baseplate dimensions
3
5
Basic installation dimensions
3
Annex ZA (normative) Normative references to international
publications with their relevant European publications
6
National annex NA (informative) Committees responsible
Inside back cover
National annex NB (informative) Cross-reference
Inside back cover
Figure 1 — Basic baseplate and installation dimensions
4
Table 1 — Baseplate reference numbers and dimensions
4
Table 2 — Selection of baseplate number and installation dimensions
5
© BSI 10-1999
i
BS EN 23661:1993
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
National foreword
This British Standard has been prepared under the direction of the Machinery
and Components Standards Policy Committee and is the English language
version of EN 23661:1993 End-suction centrifugal pumps — Baseplate and
installation dimensions, published by the European Committee for
Standardization (CEN). It is identical with ISO 3661:1977, published by the
International Organization for Standardization (ISO). EN 23661:1993 was
produced as a result of international discussion in which the UK took an active
part.
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
the EN title page, pages 2 to 6, an inside back cover and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on the
inside front cover.
ii
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EUROPEAN STANDARD
EN 23661
NORME EUROPÉENNE
July 1993
EUROPÄISCHE NORM
UDC 621.671
Descriptors: Pumps, centrifugal pumps, specifications, supports, designation, installation, dimensions
English version
End-suction centrifugal pumps — Baseplate and
installation dimensions
(ISO 3661:1977)
Pompes centrifuges à aspiration en bout —
Dimensions relatives aux socles à l’installation
(ISO 3661:1977)
Kreiselpumpen mit axialem Eintritt —
Grundplatten- und Einbau-Maße
(ISO 3661:1977)
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
This European Standard was approved by CEN on 1993-07-19. CEN members
are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a
national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any
CEN member.
This European Standard exists in three official versions (English, French,
German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the
Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom.
CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1993 Copyright reserved to CEN members
Ref. No. EN 23661:1993 E
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
Foreword
In 1990, ISO 3661:1977 End-suction centrifugal
pumps — Baseplate and installation dimensions
was submitted to the CEN Primary Questionnaire
procedure.
Following the positive result of the CEN/CS
Proposal ISO 3661:1977 was submitted to the
Formal Vote.
The result of the Formal Vote was positive.
This European Standard shall be given the status of
a national standard, either by publication of an
identical text or by endorsement, at the latest by
January 1994, and conflicting national standards
shall be withdrawn at the latest by January 1994.
According to the CEN/CENELEC Internal
Regulations, the following countries are bound to
implement this European Standard: Austria,
Belgium, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and United Kingdom.
Editorial modification
The text of clause 2, Normative references, is to be
replaced by:
NOTE Normative references to international publications are
listed in Annex ZA (normative).
2
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
1 Scope
3 References
This International Standard specifies the
basic baseplate and installation dimensions for
end-suction centrifugal pumps. Alternative
numbers and locations of baseplate fixing holes are
given to suit individual installations.
ISO/R 273, Clearance holes for metric bolts.
ISO 2858, End-suction centrifugal pumps
(rating 16 bar) — Designation, nominal duty point
and dimensions.
IEC Publication 72, Dimensions and output ratings
for rotating electrical machines — Frame
numbers 56 to 400 and flange numbers F55 to
F1080.
2 Field of application
The dimensions and other data given in this
International Standard are intended primarily for
use with centrifugal pumps in accordance with
ISO 2858, coupled to foot-mounted electric motors
for installation on a foundation.
Where suitable, this International Standard may be
used for other types of pump.
4 Baseplate dimensions
The dimensions and the reference numbers of
baseplates are given in Figure 1 and Table 1.
5 Basic installation dimensions
The baseplate number appropriate to a given pump
designation and the corresponding electric motor
frame number are obtained from Table 2.
The dimensions of the baseplate corresponding to
this number are then obtained from Table 1 and the
basic installation dimensions from the last four
columns in Table 2.
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
© BSI 10-1999
3
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
Figure 1 — Basic baseplate and installation dimensions
Table 1 — Baseplate reference numbers and dimensions
Dimensions in millimetres
Baseplate No.
2
3
4
5
6
7
8
9
L16)
800
900
1 000
1 120
1 250
1 400
1 600
1 800
L2
130
150
170
190
205
230
270
300
L3
540
600
660
740
840
940
1 060
1 200
35
35
40
40
45
50
55
55
B1
270
300
340
380
430
480
530
600
B2
360
390
450
490
540
610
660
730
B3
320
350
400
440
490
550
600
670
hmax
125
125
125
140
160
180
200
200
da: clearance hole for bolt
M16
M16
M20
M20
M20
M24
M24
M24
L4 ± 25
a
4
To ISO/R 273 (coarse series).
© BSI 10-1999
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EN 23661:1993
Table 2 — Selection of baseplate number and installation dimensions
Dimensions in millimetres
Electric motor frame No.b
Pump sizea
71 80 90 90 100 112 132 132 160 160 180 180 200 225 225 250 280 280
M M
50
50
50
50
65
65
65
65
65
65
65
80
80
80
80
80
80
80
100
100
100
100
100
100
100
125
125
125
125
125
125
125
125
125
150
150
150
200
200
200
32
32
32
32
40
50
40
50
40
40
40
50
65
50
65
50
50
50
65
80
65
80
65
65
65
80
80
80
80
80
100
100
100
100
125
125
125
150
150
150
125
160
200
250
125
125
160
160
200
250
315
125
125
160
160
200
250
315
125
125
160
160
200
250
315
160
200
250
315
400
200
250
315
400
250
315
400
250
315
400
2
2
2
2
2
2
2
2
2
S
L
2
2
2
4
2
2
2
2
3
4
5
2
2
3
3
3
4
5
3
3
3
3
4
5
2
2
2
4
2
2
2
2
3
4
5
2
2
3
3
3
4
5
3
3
4
4
4
5
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
4
5
4
5
6
4
5
6
4
5
6
5
5
5
L
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
5
5
6
5
5
6
6
7
5
6
M
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
5
5
6
5
5
6
6
7
5
6
S
M
4
4
4
5
4
4
4
4
4
5
5
4
4
4
4
4
5
5
4
4
5
5
5
5
6
5
5
6
6
7
5
6
6
4
4
4
5
4
4
4
4
4
5
5
4
4
4
4
4
5
5
4
4
5
5
5
5
6
5
5
6
6
7
5
6
6
6
M
L
M
L
L
S
M
5
6
6
6
6
7
5
5
5
6
6
5
5
5
6
6
6
6
6
6
7
7
7
7
5
5
5
6
6
5
5
5
6
6
6
6
7
7
7
7
7
7
6
8
5
5
5
6
6
5
5
6
6
6
6
6
6
6
6
6
7
6
6
6
8
6
8
6
6
6
6
7
6
6
6
7
7
6
7
7
8
7
8
8
8
8
M
8
S
M
9
Basic installation
dimensions
Hmax2)4)
260
260
300
380
260
260
300
300
300
380
405
260
260
320
320
320
405
480
300
300
380
380
405
480
480
380
380
480
480
480
480
480
480
480
450
480
515
480
515
515
A
60
60
60
75
60
60
60
60
60
75
75
60
60
60
60
60
75
75
75
75
75
75
75
90
90
75
75
90
90
90
90
90
90
110
90
110
110
110
110
110
h2a
140
160
180
225
140
140
160
160
180
225
250
160
160
180
180
200
225
280
180
180
200
200
225
250
280
225
250
280
315
355
280
280
315
355
355
355
400
375
400
450
aa
80
80
80
100
80
80
80
80
100
100
125
100
100
100
100
100
125
125
100
100
100
100
100
125
125
125
125
125
125
125
125
140
140
140
140
140
140
160
160
160
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
6
6
6
6
7
6
6
6
7
7
6
7
7
8
7
8
8
8
9
6
6
7
7
7
7
7
7
7
7
7
7
7
8
7
8
8
8
9
7
7
7
7
7
7
7
7
7
7
7
7
7
8
7
8
8
8
9
9
7
7
7
7
7
8
7
7
7
7
7
7
7
8
7
8
8
8
9
9
7
7
8
8
7
8
8
8
8
8
8
8
9
9
8
8
9
9
9
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
9
8
8
8
9
9
9
9
9
9
See note 3
NOTE 1 hmax is the maximum permissible height of the baseplate, including packing that may be used between the baseplate and
the pump or motor. The actual height may be less.
NOTE 2 Hmax in Table 2 is the maximum permitted height. The actual dimension H may be less. The values Hmax given for each
pump size take into account the maximum height for the greatest given baseplate number and the centre-line height of the pump or
motor, whichever is the greater.
NOTE 3 On the left side of the bold line in Table 2, the centre-line height of the pump is the greater; on the right side the
centre-line height of the electric motor is the greater.
NOTE 4 Additional sub-structures, for example feet for free-standing installations, vibration dampers, are not included in the
dimensions Hmax and hmax.
NOTE 5 Figure 1 shows the locations for five holes (A, B, C, D and E).
Baseplates may have either four (A, B, C and D) or three (A, C and E) holes as determined by the pump manufacturer.
NOTE 6 In Table 1, the dimensions L1 and B1 are the length and the width respectively of the working surface and do not include
casting slope.
a
To ISO 2858.
IEC 72-1.
b To
© BSI 10-1999
5
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
Annex ZA (normative)
Normative references to international publications with their relevant
European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
Publication
Year
Title
EN/HD
Year
ISO 273
Clearance holes for metric bolts
20273
1991
ISO 2858
End-suction centrifugal pumps (rating 16 bar) — Designation,
nominal duty point and dimensions
22858
1992
IEC 72-1
Dimensions and output series for rotating electrical machines —
Part 1: Frame numbers 56 to 400 and flange numbers F55 to F1080
—
—
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
6
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
BS EN 23661:1993
National annex NA (informative)
Committees responsible
The United Kingdom participation in the preparation of this European Standard was entrusted by the
Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/6, upon
which the following bodies were represented:
Association of Consulting Engineers
Association of High Pressure Water Jetting Contractors
British Chemical Engineering Contractors’ Association
British Hydromechanics Reserach Association
British Pump Manufacturers’ Association
Department of Trade and Industry (National Engineering Laboratory)
Electricity Association
Energy Industries Council
Engineering Equipment and Materials Users’ Association
Health and Safety Executive
Society of Motor Manufacturers and Traders Ltd.
UK Offshore Operators and Association Limited
Water Services Association of England and Wales
National annex NB (informative)
Cross-reference
Publication referred to
Corresponding British Standard
ISO/R 273:1979
BS 4186:1984 Specification for clearance holes for metric bolts and screws
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
BS EN
23661:1993
ISO 3661:1977
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BRITISH STANDARD
End-suction centrifugal
pumps —
Baseplate and
installation dimensions
The European Standard EN 23661:1993 has the status of a
British Standard
UDC 621.671
BS EN
23661:1993
ISO 3661:1977
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
BS EN 23661:1993
Cooperating organizations
The European Committee for Standardization (CEN), under whose supervision
this European Standard was prepared, comprises the national standards
organizations of the following countries:
Austria
Oesterreichisches Normungsinstitut
Belgium
Institut belge de normalisation
Denmark
Dansk Standardiseringsraad
Finland
Suomen Standardisoimisliito, r.y.
France
Association française de normalisation
Germany
Deutsches Institut für Normung e.V.
Greece
Hellenic Organization for Standardization
Iceland
Technological Institute of Iceland
Ireland
National Standards Authority of Ireland
Italy
Ente Nazionale Italiano di Unificazione
Luxembourg
Inspection du Travail et des Mines
Netherlands
Nederlands Normalisatie-instituut
Norway
Norges Standardiseringsforbund
Portugal
Instituto Portuguès da Qualidade
Spain
Asociación Española de Normalización y Certificación
Sweden
Standardiseringskommissionen i Sverige
Switzerland
Association suisse de normalisation
United Kingdom
British Standards Institution
This British Standard, having
been prepared under the
direction of the Machinery and
Components Standards Policy
Committee, was published
under the authority of the
Standards Board and
comes into effect on
15 September 1993
Amendments issued since publication
© BSI 10-1999
Amd. No.
The following BSI references
relate to the work on this
standard:
Committee reference MCE/6
Special announcement in
BSI News December 1992
ISBN 0 580 21909 7
Date
Comments
BS EN 23661:1993
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
Contents
Page
Cooperating organizations
Inside front cover
National foreword
ii
Foreword
2
1
Scope
3
2
Field of application
3
3
References
3
4
Baseplate dimensions
3
5
Basic installation dimensions
3
Annex ZA (normative) Normative references to international
publications with their relevant European publications
6
National annex NA (informative) Committees responsible
Inside back cover
National annex NB (informative) Cross-reference
Inside back cover
Figure 1 — Basic baseplate and installation dimensions
4
Table 1 — Baseplate reference numbers and dimensions
4
Table 2 — Selection of baseplate number and installation dimensions
5
© BSI 10-1999
i
BS EN 23661:1993
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
National foreword
This British Standard has been prepared under the direction of the Machinery
and Components Standards Policy Committee and is the English language
version of EN 23661:1993 End-suction centrifugal pumps — Baseplate and
installation dimensions, published by the European Committee for
Standardization (CEN). It is identical with ISO 3661:1977, published by the
International Organization for Standardization (ISO). EN 23661:1993 was
produced as a result of international discussion in which the UK took an active
part.
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
the EN title page, pages 2 to 6, an inside back cover and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on the
inside front cover.
ii
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EUROPEAN STANDARD
EN 23661
NORME EUROPÉENNE
July 1993
EUROPÄISCHE NORM
UDC 621.671
Descriptors: Pumps, centrifugal pumps, specifications, supports, designation, installation, dimensions
English version
End-suction centrifugal pumps — Baseplate and
installation dimensions
(ISO 3661:1977)
Pompes centrifuges à aspiration en bout —
Dimensions relatives aux socles à l’installation
(ISO 3661:1977)
Kreiselpumpen mit axialem Eintritt —
Grundplatten- und Einbau-Maße
(ISO 3661:1977)
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This European Standard was approved by CEN on 1993-07-19. CEN members
are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a
national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any
CEN member.
This European Standard exists in three official versions (English, French,
German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the
Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom.
CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1993 Copyright reserved to CEN members
Ref. No. EN 23661:1993 E
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
Foreword
In 1990, ISO 3661:1977 End-suction centrifugal
pumps — Baseplate and installation dimensions
was submitted to the CEN Primary Questionnaire
procedure.
Following the positive result of the CEN/CS
Proposal ISO 3661:1977 was submitted to the
Formal Vote.
The result of the Formal Vote was positive.
This European Standard shall be given the status of
a national standard, either by publication of an
identical text or by endorsement, at the latest by
January 1994, and conflicting national standards
shall be withdrawn at the latest by January 1994.
According to the CEN/CENELEC Internal
Regulations, the following countries are bound to
implement this European Standard: Austria,
Belgium, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and United Kingdom.
Editorial modification
The text of clause 2, Normative references, is to be
replaced by:
NOTE Normative references to international publications are
listed in Annex ZA (normative).
2
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© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
1 Scope
3 References
This International Standard specifies the
basic baseplate and installation dimensions for
end-suction centrifugal pumps. Alternative
numbers and locations of baseplate fixing holes are
given to suit individual installations.
ISO/R 273, Clearance holes for metric bolts.
ISO 2858, End-suction centrifugal pumps
(rating 16 bar) — Designation, nominal duty point
and dimensions.
IEC Publication 72, Dimensions and output ratings
for rotating electrical machines — Frame
numbers 56 to 400 and flange numbers F55 to
F1080.
2 Field of application
The dimensions and other data given in this
International Standard are intended primarily for
use with centrifugal pumps in accordance with
ISO 2858, coupled to foot-mounted electric motors
for installation on a foundation.
Where suitable, this International Standard may be
used for other types of pump.
4 Baseplate dimensions
The dimensions and the reference numbers of
baseplates are given in Figure 1 and Table 1.
5 Basic installation dimensions
The baseplate number appropriate to a given pump
designation and the corresponding electric motor
frame number are obtained from Table 2.
The dimensions of the baseplate corresponding to
this number are then obtained from Table 1 and the
basic installation dimensions from the last four
columns in Table 2.
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© BSI 10-1999
3
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
Figure 1 — Basic baseplate and installation dimensions
Table 1 — Baseplate reference numbers and dimensions
Dimensions in millimetres
Baseplate No.
2
3
4
5
6
7
8
9
L16)
800
900
1 000
1 120
1 250
1 400
1 600
1 800
L2
130
150
170
190
205
230
270
300
L3
540
600
660
740
840
940
1 060
1 200
35
35
40
40
45
50
55
55
B1
270
300
340
380
430
480
530
600
B2
360
390
450
490
540
610
660
730
B3
320
350
400
440
490
550
600
670
hmax
125
125
125
140
160
180
200
200
da: clearance hole for bolt
M16
M16
M20
M20
M20
M24
M24
M24
L4 ± 25
a
4
To ISO/R 273 (coarse series).
© BSI 10-1999
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Aug 07 12:13:45 BST 2006, Uncontrolled Copy, (c) BSI
EN 23661:1993
Table 2 — Selection of baseplate number and installation dimensions
Dimensions in millimetres
Electric motor frame No.b
Pump sizea
71 80 90 90 100 112 132 132 160 160 180 180 200 225 225 250 280 280
M M
50
50
50
50
65
65
65
65
65
65
65
80
80
80
80
80
80
80
100
100
100
100
100
100
100
125
125
125
125
125
125
125
125
125
150
150
150
200
200
200
32
32
32
32
40
50
40
50
40
40
40
50
65
50
65
50
50
50
65
80
65
80
65
65
65
80
80
80
80
80
100
100
100
100
125
125
125
150
150
150
125
160
200
250
125
125
160
160
200
250
315
125
125
160
160
200
250
315
125
125
160
160
200
250
315
160
200
250
315
400
200
250
315
400
250
315
400
250
315
400
2
2
2
2
2
2
2
2
2
S
L
2
2
2
4
2
2
2
2
3
4
5
2
2
3
3
3
4
5
3
3
3
3
4
5
2
2
2
4
2
2
2
2
3
4
5
2
2
3
3
3
4
5
3
3
4
4
4
5
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
4
5
4
5
6
4
5
6
4
5
6
5
5
5
L
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
5
5
6
5
5
6
6
7
5
6
M
3
3
3
4
3
3
3
3
3
4
5
3
3
3
3
3
4
5
3
3
4
4
5
5
6
5
5
6
6
7
5
6
S
M
4
4
4
5
4
4
4
4
4
5
5
4
4
4
4
4
5
5
4
4
5
5
5
5
6
5
5
6
6
7
5
6
6
4
4
4
5
4
4
4
4
4
5
5
4
4
4
4
4
5
5
4
4
5
5
5
5
6
5
5
6
6
7
5
6
6
6
M
L
M
L
L
S
M
5
6
6
6
6
7
5
5
5
6
6
5
5
5
6
6
6
6
6
6
7
7
7
7
5
5
5
6
6
5
5
5
6
6
6
6
7
7
7
7
7
7
6
8
5
5
5
6
6
5
5
6
6
6
6
6
6
6
6
6
7
6
6
6
8
6
8
6
6
6
6
7
6
6
6
7
7
6
7
7
8
7
8
8
8
8
M
8
S
M
9
Basic installation
dimensions
Hmax2)4)
260
260
300
380
260
260
300
300
300
380
405
260
260
320
320
320
405
480
300
300
380
380
405
480
480
380
380
480
480
480
480
480
480
480
450
480
515
480
515
515
A
60
60
60
75
60
60
60
60
60
75
75
60
60
60
60
60
75
75
75
75
75
75
75
90
90
75
75
90
90
90
90
90
90
110
90
110
110
110
110
110
h2a
140
160
180
225
140
140
160
160
180
225
250
160
160
180
180
200
225
280
180
180
200
200
225
250
280
225
250
280
315
355
280
280
315
355
355
355
400
375
400
450
aa
80
80
80
100
80
80
80
80
100
100
125
100
100
100
100
100
125
125
100
100
100
100
100
125
125
125
125
125
125
125
125
140
140
140
140
140
140
160
160
160
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6
6
6
6
7
6
6
6
7
7
6
7
7
8
7
8
8
8
9
6
6
7
7
7
7
7
7
7
7
7
7
7
8
7
8
8
8
9
7
7
7
7
7
7
7
7
7
7
7
7
7
8
7
8
8
8
9
9
7
7
7
7
7
8
7
7
7
7
7
7
7
8
7
8
8
8
9
9
7
7
8
8
7
8
8
8
8
8
8
8
9
9
8
8
9
9
9
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
9
8
8
8
9
9
9
9
9
9
See note 3
NOTE 1 hmax is the maximum permissible height of the baseplate, including packing that may be used between the baseplate and
the pump or motor. The actual height may be less.
NOTE 2 Hmax in Table 2 is the maximum permitted height. The actual dimension H may be less. The values Hmax given for each
pump size take into account the maximum height for the greatest given baseplate number and the centre-line height of the pump or
motor, whichever is the greater.
NOTE 3 On the left side of the bold line in Table 2, the centre-line height of the pump is the greater; on the right side the
centre-line height of the electric motor is the greater.
NOTE 4 Additional sub-structures, for example feet for free-standing installations, vibration dampers, are not included in the
dimensions Hmax and hmax.
NOTE 5 Figure 1 shows the locations for five holes (A, B, C, D and E).
Baseplates may have either four (A, B, C and D) or three (A, C and E) holes as determined by the pump manufacturer.
NOTE 6 In Table 1, the dimensions L1 and B1 are the length and the width respectively of the working surface and do not include
casting slope.
a
To ISO 2858.
IEC 72-1.
b To
© BSI 10-1999
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EN 23661:1993
Annex ZA (normative)
Normative references to international publications with their relevant
European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
Publication
Year
Title
EN/HD
Year
ISO 273
Clearance holes for metric bolts
20273
1991
ISO 2858
End-suction centrifugal pumps (rating 16 bar) — Designation,
nominal duty point and dimensions
22858
1992
IEC 72-1
Dimensions and output series for rotating electrical machines —
Part 1: Frame numbers 56 to 400 and flange numbers F55 to F1080
—
—
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6
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BS EN 23661:1993
National annex NA (informative)
Committees responsible
The United Kingdom participation in the preparation of this European Standard was entrusted by the
Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/6, upon
which the following bodies were represented:
Association of Consulting Engineers
Association of High Pressure Water Jetting Contractors
British Chemical Engineering Contractors’ Association
British Hydromechanics Reserach Association
British Pump Manufacturers’ Association
Department of Trade and Industry (National Engineering Laboratory)
Electricity Association
Energy Industries Council
Engineering Equipment and Materials Users’ Association
Health and Safety Executive
Society of Motor Manufacturers and Traders Ltd.
UK Offshore Operators and Association Limited
Water Services Association of England and Wales
National annex NB (informative)
Cross-reference
Publication referred to
Corresponding British Standard
ISO/R 273:1979
BS 4186:1984 Specification for clearance holes for metric bolts and screws
© BSI 10-1999
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BS EN
23661:1993
ISO 3661:1977
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