EN 558:2022

SLOVENSKI STANDARD
01-april-2022
Nadomešča:
SIST EN 558:2017
Industrijski ventili - Vgradne dolžine kovinskih ventilov za cevovode s
prirobnicami - Ventili, označeni po PN in Class
Industrial valves - Face-to-face and centre-to-face dimensions of metal valves for use in
flanged pipe systems - PN and Class designated valves
Industriearmaturen - Baulängen von Armaturen aus Metall zum Einbau in Rohrleitungen
mit Flanschen - Nach PN und Class bezeichnete Armaturen
Robinetterie industrielle - Dimensions face-à-face et face-à-axe de la robinetterie
métallique utilisée dans les systèmes de canalisations à brides - Appareils de
robinetterie désignés PN et Class
Ta slovenski standard je istoveten z: EN 558:2022
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 558
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2022
EUROPÄISCHE NORM
ICS 23.040.99; 23.060.01 Supersedes EN 558:2017
English Version
Industrial valves - Face-to-face and centre-to-face
dimensions of metal valves for use in flanged pipe systems
- PN and Class designated valves
Robinetterie industrielle - Dimensions face-à-face et Industriearmaturen - Baulängen von Armaturen aus
face-à-axe de la robinetterie métallique utilisée dans Metall zum Einbau in Rohrleitungen mit Flanschen -
les systèmes de canalisations à brides - Appareils de Nach PN und Class bezeichnete Armaturen
robinetterie désignés PN et Class
This European Standard was approved by CEN on 10 January 2022.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 558:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Dimensions and tolerances . 9
4.1 Basic series . 9
4.2 Face-to-face and centre-to-face dimensions. 9
4.2.1 General . 9
4.2.2 Class designated valves with ring joint flanges . 10
4.2.3 Valves with lining . 13
4.2.4 Raised face flanges . 13
4.3 Tolerances . 13
Annex A (informative) Origin of basic series . 46
Annex B (informative) Relationship between DN and NPS . 50
Annex C (informative) Overview of special basic series (compared to the previous version) . 51
Bibliography . 53
European foreword
This document (EN 558:2022) has been prepared by Technical Committee CEN/TC 69 “Industrial
valves”, the secretariat of which is held by AFNOR.
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 August 2022, and conflicting national standards shall be
withdrawn at the latest by August 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 558:2017.
In comparison with the previous edition, the following technical modifications have been made:
— deletion of Table 2 and integration in the tables of the relevant product;
— basic series 125 added and used in Table 14;
— basic series 126, 127, 128 added and used in Table 21;
— basic series included in EN 558:2017 that are considered special transferred to Annex C.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
The basic series given in this document are taken from the original series shown in Annex A. Changes
made to the original series will not be automatically incorporated into this document.
The numbers of the existing ISO basic series are maintained as in ISO 5752:2021.
1 Scope
This document specifies the “face-to-face” (FTF) and “centre-to-face” (CTF) dimensions for PN and Class
designated metal valves used in flanged pipe systems.
This document covers valves with the following PN, Class and DN values:
— PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160; PN 250; PN 320; PN 400;
— Class 125; Class 150; Class 250; Class 300; Class 600; Class 900; Class 1 500; Class 2 500;
— DN 10; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150; DN 200;
DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750; DN 800; DN 900;
DN 1 000; DN 1 050; DN 1 200; DN 1 400; DN 1 600; DN 1 800; DN 2 000.
For valves in other shell materials than metal the same FTF and CTF dimensions can be used.
For relationship between DN and NPS, see Annex B.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 736-1, Valves - Terminology - Part 1: Definition of types of valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 736-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
face-to-face dimension
FTF
distance between the two planes perpendicular to the valve axis located at the extremities of the body
end ports or as specified in the relevant valve product standard
Note 1 to entry: It is applicable to straight pattern valves.
Note 2 to entry: See Figures 1 to 4.
Note 3 to entry: In millimetres.
3.2
centre-to-face dimension
CTF
distance between the plane located at the extremity of either body end port and perpendicular to its axis
and the axis of the other body end port
Note 1 to entry: It is applicable to angle pattern valves.
Note 2 to entry: See Figures 1 to 4.
Note 3 to entry: In millimetres.

Key
a face-to-face (FTF)
b centre-to-face (CTF)
Figure 1 — Face to face and centre to face dimensions

Type A Type B
Key
a face-to-face (FTF)
Figure 2 — Flanged valves PN and Class designated (flat and raised faces)
Type C Type D Type E Type F Type G Type H
Key
a face-to-face (FTF)
Figure 3 — Flanged valves PN designated (other types)

Class 150 and Class 300 Class 600 and above
Large
or
small
male
face
Large
or
small
female
face
Large
or
small
tongue
Large
or
small
groove
Key
a for dimensions see Tables 5 to 31
b face-to-face (FTF)
c centre-to-face (CTF)
e height
NOTE For height e, see EN 1759 series.
Figure 4 — Flanged valves Class designated (other types)
4 Dimensions and tolerances
4.1 Basic series
The basic series of FTF and CTF dimensions shall be as given in Tables 5 to 31.
In those tables, there are several series which are non-preferred, but represent history and commercial
decisions made by manufacturers utilizing only one pattern for PN and Class designated valves. Those
series are identified in the relevant tables.
4.2 Face-to-face and centre-to-face dimensions
4.2.1 General
The FTF and CTF dimensions shall be in accordance with Figures 1 to 4.
For each type of valve, the basic series to be taken into consideration are given in Tables 5 to 31.
Table 1 associates the Tables 5 to 31 of the present document with the product standards of industrial
valves. In Table 5 to Table 31, the dimensions may not be given for all values of DN. For certain
sizes/types of valves, alternative dimensions are permitted and these are specified in Table 5 to
Table 31 as appropriate. The origin of the basic series is shown in Annex A.
Table 1 — Correspondence between the FTF series tables of valve types and the product
standards
Product standard
Table numbers Designation
number
EN 1171 Industrial valves — Cast iron gate valves
5, 6 EN 1984 Industrial valves — Steel gate valves
EN 12288 Industrial valves — Copper alloy gate valves
Industrial valves — Metallic butterfly valves for
7, 8, 9, 10 EN 593
general purposes
11, 12 EN 1983 Industrial valves — Steel ball valves
Industrial valves — Diaphragm valves made of
13 EN 13397
metallic materials
EN 13789 Industrial valves — Cast iron globe valves
14, 15, 16, 17
Industrial valves — Steel globe and globe stop and
EN 13709
check valves
18, 19, 20, 21 EN 16767 Industrial valves — Metallic check valves
22, 23, 24, 25, 26, 27,
EN 1349 Industrial process control valves
28, 29
30, 31 EN 26704 Automatic steam traps — Classification
4.2.2 Class designated valves with ring joint flanges
For Class designated valves with ring joint flanges, the FTF or CTF dimensions given in Tables 6, 8, 10, 12,
15, 17, 19, 21, 23, 25, 27, 29 shall be increased by x as defined in Table 2 and Figure 5.
a)
b)
Key
a FTF = Dimension of Tables 6, 8, 10, 12, 15, 19, 21, 23, 27, 29 + x
b CTF= Dimension of Tables 17, 25 + 0.5x
Figure 5 — FTF and CTF dimensions for Class designated valves with ring joint flanges
Table 2 — Additional length x for ring joint flanges
Dimensions in millimetres
Nominal
Additional length x for ring joint flanges
size
DN Class 150 Class 300 Class 600 Class 900 Class 1 500 Class 2 500
15 11,1 11,1 −1,6
20 0
25 0 0
12,7 0
40 3,2
6,4
80 3,2
100 9,5
125 3,2
12,7 12,7
150 6,4
15,9 3,2
200 15,9
9,5
22,2
300 15,9
350 19,1
9,5
450 22,2
12,7
500 19,1 6,4
600 22,2 9,5 19,1 28,6
—
25,4 12,7
800 — — —
900 28,6 15,9
1 000
4.2.3 Valves with lining
For valves having a resilient lining which forms the gasket joint with the mating flanges, the FTF and CTF
...