EN 15611:2020

SLOVENSKI STANDARD
01-junij-2020
Nadomešča:
SIST EN 15611:2009+A1:2011
Železniške naprave - Zavore - Ventili za kontrolo tlaka
Railway applications - Braking - Relay valves
Bahnanwendungen - Bremse - Relaisventile
Applications ferroviaires - Freinage - Relais pneumatiques
Ta slovenski standard je istoveten z: EN 15611:2020
ICS:
23.060.99 Drugi ventili Other valves
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15611
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 45.040 Supersedes EN 15611:2008+A1:2010
English Version
Railway applications - Braking - Relay valves
Applications ferroviaires - Freinage - Relais Bahnanwendungen - Bremse - Relaisventile
pneumatiques
This European Standard was approved by CEN on 13 January 2020.

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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15611:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and abbreviations . 9
5 Design and manufacture . 9
5.1 General . 9
5.2 Functional requirements. 11
5.3 Shock and vibration . 16
5.4 Environmental conditions . 16
5.5 Compressed air quality . 18
5.6 Service life . 18
5.7 Fire behaviour . 19
5.8 External appearance . 19
5.9 Design requirements regarding pressure stress . 19
5.10 Interface . 19
6 Materials . 19
7 Type tests . 20
7.1 General . 20
7.2 Type test of an individual relay valve . 20
8 In-service assessment. 46
9 Designation. 46
10 Identification and marking . 46
Annex A (informative) In-service assessment . 47
A.1 General . 47
A.2 Test set-up and sampling . 47
A.3 Procedure. 47
A.4 Pass/fail criteria . 47
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2008/57/EC aimed to be covered . 48
Bibliography . 50

European foreword
This document (EN 15611:2020) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
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 15611:2008+A1:2010.
Compared to the previous edition, the following changes have been made:
a) normative references have been updated;
b) terms and definitions have been revised;
c) requirements on design have been revised;
d) requirements on materials have been revised;
e) requirements on type testing have been revised;
f) requirements on in-service assessment have been revised
g) requirements on markings have been revised;
h) annexes have been revised.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive 2008/57/EC.
For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of
this document.
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.
1 Scope
This document is applicable to relay valves designated to control the brake cylinder pressure of
compressed air brakes fitted to railway vehicles, in association with an air brake distributor valve or
other control device. It covers one stage relay valves and relay valves adjusting the brake cylinder
pressure in response to a change in vehicle speed or load that is either continuously variable or in two or
more stages, i.e. empty – loaded.
Relay valves operating with other pressures, in particular the brake pipe pressure, are not included.
This document specifies the requirements for the design, manufacture and testing of relay valves.
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 14478:2017, Railway applications — Braking — Generic vocabulary
EN 15355:2019, Railway applications — Braking — Distributor valves and distributor-isolating devices
EN 15625:2008+A1:2010, Railway applications — Braking — Automatic variable load sensing devices
EN 45545-1:2013, Railway applications — Fire protection on railway vehicles — Part 1: General
EN 45545-2:2013+A1:2015, Railway applications — Fire protection on railway vehicles — Part 2:
Requirements for fire behaviour of materials and components
EN 50125-1:2014, Railway applications — Environmental conditions for equipment — Part 1: Rolling
stock and on-board equipment
EN 60721-3-5:1997, Classification of environmental conditions — Part 3: Classification of groups of
environmental parameters and their severities — Section 5: Ground vehicle installations
(IEC 60721-3-5:1997)
EN 61373:2010, Railway applications — Rolling stock equipment — Shock and vibration tests
(IEC 61373:2010)
EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads —Part 1:
Dimensions, tolerances and designation (ISO 228-1:2000)
ISO 8573-1:2010, Compressed air —Part 1: Contaminants and purity classes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14478:2017, EN 15355:2019
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
relay valve
device, the main function of which is to control a pneumatic output pressure as a function of the variation
of one or more input pressures (see Figure 1)

Key
1 first input pressure
2 second input pressure
3 third input pressure
4 control signal – continuous load sensing pressure (LCP), or control signal – empty/load signal pressure (LSP),
or mechanical input (lever) or electrical input
5 auxiliary reservoir pressure, supply pressure (AR)
6 output pressure
7 relay valve
Figure 1 — Relay valve, pressures and signals
3.2
input pressure
control pressure received by the relay valve
Note 1 to entry: Pressure generally considered as being the output pressure from a distributor or a brake control
unit; sometimes referred to as pilot pressure or dummy brake cylinder pressure.
3.3
output pressure
pressure output from the relay valve, generally considered as being the brake cylinder pressure
Note 1 to entry: This pressure can also be used as the input pressure to another relay valve. The output pressure
can obtain one or more fixed levels or it can be changed continuously between a minimum and a maximum or vice
versa.
3.4
relay valve ratio
ratio of the output pressure value to input pressure value
3.5
control signal
signal used to change the relay valve ratio:
— received from the continuous load sensing device (LCP),
— received from empty-loaded changeover device (LSP),
— generated by the position of mechanical changeover,
— generated by other means, e.g. speed dependent
3.6
relay valve type A
relay valve with one fixed relay valve ratio, where the ratio can be less (step-down), equal or greater
(step-up) than 1
3.7
relay valve type B1
relay valve with two or more fixed relay valve ratios that can change during a brake application, where
the ratio can be less (step-down), equal or greater (step-up) than 1
Note 1 to entry: Typically, two stages “empty/load” relay valve, giving an empty (tare) or a loaded output
pressure proportional to input pressure dependant on the load signal input and used on vehicles operated in empty
or fully loaded condition. Alternatively, the ratio can be changed in function of speed.
3.8
relay valve type B2
relay valve with two or more fixed relay valve ratios that cannot change during a brake application, where
the ratio can be less (step-down), equal or greater (step-up) than 1
Note 1 to entry: Typically, two stage “empty/load” relay valve, giving an emp
...