EN 14601:2005+A2:2021

SLOVENSKI STANDARD
01-februar-2022
Železniške naprave - Ravne in kotne zaporne pipe za zavorne in glavne zračne
vode
Railway applications - Straight and angled end cocks for brake pipe and main reservoir
pipe
Bahnanwendungen - Gerade und abgewinkelte Luftabsperrhähne für die Hauptluftleitung
und Hauptbehälterleitung
Applications ferroviaires - Robinets d'arrêt droit ou coudé pour conduite générale de frein
et conduite principale
Ta slovenski standard je istoveten z: EN 14601:2005+A2:2021
ICS:
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 14601:2005+A2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 45.060.01 Supersedes EN 14601:2005+A1:2010
English Version
Railway applications - Straight and angled end cocks for
brake pipe and main reservoir pipe
Applications ferroviaires - Robinets d'arrêt droit ou Bahnanwendungen - Gerade und abgewinkelte
coudé pour conduite générale de frein et conduite Luftabsperrhähne für die Hauptluftleitung und
principale Hauptbehälterleitung
This European Standard was approved by CEN on 30 August 2010 and includes Amendment 2 approved by CEN on 4 October
2021.
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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14601:2005+A2:2021 E
worldwide for CEN national Members.

Contents Page
Foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 10
4.1 General . 10
4.2 Operating conditions . 10
4.3 Functional characteristics . 11
4.3.1 General . 11
4.3.2 Open and closed positions . 11
4.3.3 Lubrication . 11
4.3.4 Venting port . 11
4.3.5 Torque . 11
4.3.6 Spindle handle of the end cock . 11
4.3.7 Fall time . 12
4.3.8 Leakage . 12
4.3.9 Vacuum withstanding . 12
4.3.10 Pneumatic shocks. 13
4.4 Constructional characteristics . 13
4.4.1 External appearance . 13
4.4.2 Connections . 13
4.4.3 Space envelope . 13
4.4.4 Mechanical shocks . 13
4.4.5 Resistance to torque . 13
4.4.6 Life expectancy . 13
5 Type test methods . 13
5.1 Sampling for type test . 13
5.2 Test requirements . 14
5.3 Test procedure . 14
5.3.1 Principle . 14
5.3.2 Check of physical and geometrical characteristics . 15
5.3.3 Measurement of the operating torque . 15
5.3.4 Measurement of the pressure fall time . 15
5.3.5 Hydraulic test (water pressure) of the end cock body at given pressure . 17
5.3.6 Operating test under air flow condition . 18
5.3.7 Pneumatic test of the isolating device at given pressures and temperatures18
5.3.8 Endurance at ambient temperature with reduced air flow . 20
5.3.9 Measurement of the operating torque drift . 21
5.3.10 Vibration test . 21
5.3.11 Resistance to shock test . 21
5.3.12 Vacuum test . 22
5.3.13 Corrosion test . 23
5.3.14 Resistance to torque . 23
5.3.15 Examination . 25
5.4 Approval validity . 25
5.5 Type test report . 25
6 Homologation . 25
6.1 General . 25
6.1.1 Procedure . 25
6.1.2 Pass/fail criteria . 26
6.2 Homologation test report . 26
7 Routine tests . 26
8 Designation . 26
9 Marking . 27
Annex A (normative) Dimensions of end cocks . 28
Bibliography . 32

Foreword
This document (EN 14601:2005+A2:2021) 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 June 2022, and conflicting national
standards shall be withdrawn at the latest by June 2022.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any
or all such patent rights.
This document includes Amendment 1, approved by CEN on 2010-08-30.
This document includes Amendment 2, approved by CEN on 2021-10-04.
This document supersedes #EN 14601:2005+A1:2010$.
The start and finish of text introduced or altered by amendment is indicated in the text by tags
! ".
The start and finish of text introduced or altered by amendment is indicated in the text by tags
# $.
#Deleted paragraphs$
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.
1 Scope
This European Standard is applicable to manually operated end cocks designed to cut-off the
brake pipe and the main reservoir pipe of the air brake and compressed air system of rail
vehicles; without taking the type of vehicles and track-gauge into consideration.
This European Standard specifies requirements for the design, dimensions, testing and
certification (qualification and/or homologation), and marking.
2 Normative references
The following referenced documents are indispensable for the application 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 50125-1, Railway applications — Environmental conditions for equipment — Part 1:
Equipment on board rolling stock
EN 61373, Railway applications — Rolling stock equipment — Shock and vibration tests
(IEC 61373:1999)
EN ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads — Part 2:
Verification by means of limit gauges (ISO 228-2:1987)
ISO 5208:1993, Industrial valves — Pressure testing of valves
ISO 8573-1:2001, Compressed air — Part 1: Contaminants and purity classes
ISO 9227:1990, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions shall apply.
3.1
end cock
two position, three way cock, with no piped vent and, with a rotary spindle moved by the
operating handle
3.2 Components
3.2.1
port
terminus of a fluid passage in a component (to which may be connected pipelines) for the
transmission of fluid to, or from the component
3.2.1.1
venting port
port which provides passage to atmosphere
3.2.1.2
outlet port
port which is vented to atmosphere when the cock is closed
3.2.1.3
inlet port
port which is not vented when the cock is closed
3.2.1.4
threaded port
port arranged to accept screw threaded connection
3.2.2
direction of rotation
direction of rotation quoted as viewed looking at the handle side
NOTE In case of doubt a sketch should be provided.
3.2.3
mechanical detent
spring arrangement to retain moving parts in open or closed position and only able to be moved
to another position with the specified force
3.2.4
latch
mechanical device to retain moving parts in open or closed position which can only be moved
when the latch is released
3.3 Types of end cocks
3.3.1 Design
3.3.1.1
straight end cock
cock with axis of inlet and outlet ports in line
NOTE See Figure 1.
Figure 1 — Straight end cock
3.3.1.2
angled end cock
cock with axis of outlet port at an angle of (35 ± 2)° with axis of inlet port
NOTE See Figure 2.
Figure 2 — Angled end cock
3.3.2 Location of the handle
3.3.2.1
right hand end cock
handle located at the right hand side of the end cock with the handle closed in a vertically
upwards position
NOTE 1 The end cock is opened by rotating the handle in an anticlockwise direction (see Figure 3).
NOTE 2 Standard mounting position. Other positions of handle are defined by drawing (see Figure 3).

Key
1 Closed position
2 Open position
3 Outlet port
4 Inlet port
Figure 3 — Right hand end cock
3.3.2.2
left hand end cock
handle located at the left hand side of the cock with the handle closed is in a vertically upwards
position
NOTE 1 The cock is opened by rotating the handle in a clockwise direction (see Figure 4).
NOTE 2 Standard mounting position. Other positions of handle are defined by drawing (see Figure 4).
Key
1 Closed position
2 Open position
3 Outlet port
4 Inlet port
Figure 4 — Left hand end cock
3.4 States
3.4.1
closed position
position of the valve component part in which the flow path between inlet and outlet ports is
closed and the venting passage is open and connected to the hose and coupling side of the cock
NOTE 1 The cock handle is closed in the vertically upwards position on the vehicle.
NOTE 2 The purchaser will define the angle between the cock inlet port axis and the vertically
upwards handle position for cocks not mounted horizontally.
3.4.2
open position
position of the valve member in which the flow path between inlet and outlet ports is fully open,
and the venting passage is closed
3.4.3
fall time
time taken in a device for a quantity of air to fall from a specified high pressure level down to a
specified lower pressure level
NOTE Parameter used to define the fluid characteristic of the cock.
3.4.4
proof pressure
test pressure, in excess of a maximum rated pressure, which causes no malfunction or
permanent deformation damage
3.5
temperature range
range of the temperature within which the apparatus can operate satisfactorily
3.6 Leakage
3.6.1
external leakage
leakage of the fluid contained in the end cock to atmosphere
3.6.2
internal leakage
leakage of the fluid contained in the end cock from one side to the other side with the valve
component part in the closed position
3.7
drift
change or variation of a condition with time under steady state operating conditions
3.8
life expectancy
predicted working period during which a component or system will maintain a specified level of
performance under specified conditions
NOTE Sometimes expressed in statistical term as a probability.
4 Requirements
4.1 General
Workmanship and quality shall be ensured by the manufacturer, therefore quality assurance is
the responsibility of the manufacturer under the agreement with the purchaser. Warranty of the
part is also the responsibility of the manufacturer in accordance with the agreement with the
purchaser.
4.2 Operating conditions
The end cock shall be able to function under the following conditions:
a) Where the air quality of the compressed air specified in ISO 8573-1:2001, class 4-4-5. This
requirement is verified when tests are carried out in accordance with 5.2.
b) In the temperature range for the environmental conditions to which the rail vehicle is
submitted during its operation and at least for a temperature range defined by the class T2
of EN 50125-1. The purchaser can specify a higher temperature value if operational
constraints demand it. This requirement is tested in accordance with 5.3.3, 5.3.7 and 5.3.12.
c) The end cock shall withstand the external corrosion due to normal atmospheric pollutants
as specified in EN 50125-1. The end cock is tested in accordance with the test shown
in 5.3.13.
d) In the vibrational environment of the rail vehicle on which it is mounted and it shall remain
in either the open or closed position. The cock shall be tested in accordance with 5.3.10.
4.3 Functional characteristics
4.3.1 General
The operating handle of the end cock shall be equipped with a detent or latch system.
The requirements given in 4.3.2 to 4.3.10 are defined to ensure the air flow through the brake
pipe and main reservoir pipe and ensure no malfunction of the cock after the brake pipe test (as
part of the brake test before the trains start).
4.3.2 Open and closed positions
The handle position shall be the same on any vehicle, so the opening and closing of the cock
shall be achieved by turning its spindle through a minimum of 90° and not more than 100°.
Stops shall be provided at the extremes of rotation, so that the open and closed positions are
achieved positively. The open and closed positions are defined in 3.4.1 and 3.4.2.
4.3.3 Lubrication
It shall be possible to operate the end cock at all pressures without additional lubrication.
4.3.4 Venting port
The end cock shall incorporate a venting port with a minimum area of 80 mm , arranged so that
when the cock is closed the compressed air from the coupling hose end of the cock (outlet port
connected to the next vehicle) can be exhausted to atmosphere. Venting shall have commenced
when the operation of the end cock has reduced the cross-sectional area of the bore of the end
cock by one third. The venting port shall not be able to be obstructed when the cock is mounted
on the rail vehicle.
The venting port shall be designed and arranged such that the under usual operation, the
operating personnel are not endangered by the exhaust-flow, or objects carried by it, nor by
excessive noise level.
4.3.5 Torque
All end cocks with mechanical detent, or with latch engaged shall not be operated by vibration
or shocks. The end cock shall be capable of manual operation therefore the operating torque of
the handle shall be in the range of 9 Nm to 20 Nm for end cocks with detent and a maximum of 6
Nm for cocks with latch. The torque is tested in accordance with 5.3.3. Torque drifts shall not be
allowed. This requirement is tested in accordance with 5.3.9.
4.3.6 Spindle handle of the end cock
Where the handle is detachable and the unique angular relationship between it and the spindle
is not constructionally ensured, it shall not be possible to assemble the handle to the spindle
except where the axis of the handle and the diametrical spindle mark are aligned and the
spindle shall be marked in accordance with Figure 5 or as otherwise specified by the purchaser.
The relative position of the handle and spindle, when assembled, shall be maintained under all
operating and environmental conditions. The notch in accordance with Figure 5 indicates the
position of the spindle (open/closed).
NOTE Detachable handles and the spindle should be designed in such a way that an unambiguous
angular relationship between handle and spindle will remain.

Figure 5 — Marking on end of the spindle
4.3.7 Fall time
The air passages shall be designed to minimize the air flow losses within the cock and the cross-
sectional area shall not be smaller than the cross-sectional area of a plain pipe of 25 mm
internal diameter. The pressure fall time should not be longer than that for an equivalent pipe of
the same nominal diameter, as tested in 5.3.4.
4.3.8 Leakage
The sealing arrangement within the end cock shall prevent any unacceptable loss of air. The
allowable loss of air shall be less than the leakage values when tested in accordance with 5.3.7.
4.3.9 Vacuum withstanding
When the purchaser requires a vacuum withstand, the end cock shall be able to function with a
pressure of 0,75 bar below atmospheric pressure. The leakage is tested in accordance with
5.3.12.
4.3.10 Pneumatic shocks
The components shall be able to resist the pneumatic shocks to which the cock is subject when
opening quickly. This requirement is tested in accordance with 5.3.6.
4.4 Constructional characteristics
4.4.1 External appearance
The external surfaces of the end cock shall be free of sharp edges which could be a danger to
those persons handling the cock or to other equipment in the proximity of the end cock. This
requirement shall
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