FprEN 14420-7

SLOVENSKI STANDARD
01-januar-2026
Cevni fitingi z objemkami - 7. del: Spojke z vzvodno ročico
Hose fittings with clamp units - Part 7: Cam locking couplings
Schlaucharmaturen mit Klemmfassungen - Teil 7: Hebelarmkupplungen
Raccords pour flexibles avec demi-coquille - Partie 7 : Raccords à cames
Ta slovenski standard je istoveten z: prEN 14420-7
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 14420-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 23.040.70 Will supersede EN 14420-7:2022
English Version
Hose fittings with clamp units - Part 7: Cam locking
couplings
Raccords pour flexibles avec demi-coquille - Partie 7 : Schlaucharmaturen mit Klemmfassungen - Teil 7:
Raccords à cames Hebelarmkupplungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 218.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14420-7:2025 E
worldwide for CEN national Members.

prEN 14420-7:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 6
4.1 Construction . 6
4.2 Temperatures . 7
5 Survey . 7
6 Types of connection. 9
7 Designation. 10
8 Dimensions . 10
8.1 General . 10
8.2 Coupler types . 10
8.2.1 Coupler type DF (item No. 1 a). 10
8.2.2 Coupler type BF (item No. 1 b). 12
8.2.3 Coupler type DW (item No. 1 c) . 13
8.2.4 Coupler type CC (item No. 1 d) . 13
8.2.5 Dust cap, Coupler type DC (item No. 1 e) . 15
8.3 Cam arm (item No. 2) . 16
8.4 Pin (item No. 3) . 18
8.5 Ring (item No. 4) . 18
8.6 Main gasket (item No. 5) . 19
8.7 Thread gasket (item No. 6) . 20
8.8 Adapter types . 20
8.8.1 Adapter type AF (item No. 8 a) . 20
8.8.2 Adapter type FF (item No. 8 b). 21
8.8.3 Adapter type AW (item No. 8 c) . 22
8.8.4 Adapter type EC (item No. 8 d) . 23
8.8.5 Dust plug, Adapter type DP (item No. 8 e) . 24
9 Materials . 25
9.1 General . 25
9.2 Coupler and adapter body . 25
9.3 Cam arm (item No. 2) . 26
9.4 Pin (item No. 3) . 26
9.5 Ring (item No. 4) . 26
9.6 Main gasket (item No. 5) . 26
9.7 Thread gasket (item No. 6) . 26
10 Marking . 27
11 Type testing and quality control . 27
Bibliography . 30
prEN 14420-7:2025 (E)
European foreword
This document (prEN 14420-7:2025) has been prepared by Technical Committee CEN/TC 218 “Rubber
and plastics hoses and hose assemblies”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14420-7:2022/AC:2023.
prEN 14420-7:2025 includes the following significant technical changes with respect to EN 14420-7:
2022/AC:2023:
— for Figure 3, the symbol d6 have been deleted as d6 does not appear in the document;
— for Figure 6, the missing explanation for entry 1 have been included.
The EN 14420 series, Hose fittings with clamp units, consists of the following parts:
— Part 1: Requirements, types of fixing and connection, designation and testing
— Part 2: Hose side parts of hose tail
— Part 3: Clamp units, bolted or pinned
— Part 4: Flange connections
— Part 5: Threaded connections
— Part 6: TW tank truck couplings
— Part 7: Cam locking couplings
— Part 8: Symmetrical half coupling (Guillemin system)
prEN 14420-7:2025 (E)
Introduction
Cam locking couplings are manufactured worldwide according to the American “military specification”
MIL-C-27487, which fixes the coupling side in a limited way, but not the connection side. Other parts like
levers, bolts, ring and gaskets are not standardized.
prEN 14420-7:2025 (E)
1 Scope
This document specifies the design, materials, dimensions and marking requirements for cam locking
couplings that serve as the link between hoses and connections to transport liquids, solids and gases,
except liquid gas and steam.
For all sizes of aluminium cast material couplings and for all couplings of size DN 100, the pressure range
is from −0,8 bar to 10 bar in the working temperature range from −20 °C to +65 °C. All other couplings
according to this document are capable of operating within the pressure range from 0,8 bar to 16 bar in
the working temperature range from −20 °C to +65 °C.
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 755-2, Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 2: Mechanical
properties
EN 1706, Aluminium and aluminium alloys - Castings - Chemical composition and mechanical properties
EN 1982, Copper and copper alloys - Ingots and castings
EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 10213, Steel castings for pressure purposes
EN 12420, Copper and copper alloys - Forgings
EN 14420-1:2013, Hose fittings with clamp units - Part 1: Requirements, types of fixing and connection,
designation and testing
EN 14420-2, Hose fittings with clamp units - Part 2: Hose side parts of hose tail
EN 14420-5, Hose fittings with clamp units - Part 5: Threaded connections
EN 22768-1, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications (ISO 2768-1)
EN 22768-2 , General tolerances - Part 2: Geometrical tolerances for features without individual tolerance
indications (ISO 2768-2)
EN ISO 8330, Rubber and plastics hoses and hose assemblies - Vocabulary (ISO 8330)
ISO 272, Fasteners — Hexagon products — Widths across flats

1 bar = 0,1 MPa.
EN 22768-2 has been withdrawn and replaced by EN ISO 22081.
prEN 14420-7:2025 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 8330 and the following
apply.
ISO and IEC maintain terminology 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
DN
nominal size
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprised of the letters DN followed by a dimensionless whole number which is indirectly
related to the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN does not represent a measurable value and is not be used
for calculation purposes except where specified in the relevant standard.
Note 2 to entry: In those standards which use the DN designation system, any relationship between DN and
component dimensions is to be indicated, e.g. DN/OD or DN/ID.
[SOURCE: EN ISO 6708:1995, 2.1, modified]
3.2
PN
alphanumeric designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a hose fitting
Note 1 to entry: It comprises the letters PN followed by a dimensionless number.
Note 2 to entry: The number following the letters PN does not represent a measurable value and should not be
used for calculation purposes except where specified in the relevant standard.
3.3
main gasket
interface gasket between the male and female part of a coupling
3.4
thread gasket
flat faced gasket for threads according to EN ISO 228-1
4 Requirements
4.1 Construction
The curves of the lever and the adapters as well as the dimensions of the main gaskets shall be
harmonized such that twisting of the hose and vibrating during operation shall not lead to leakage. Cam
arms shall be manually operable.
Cam arms shall be suitable to operate without using tools.
For gauges for cam-locking couplings according to this document see Annex A.
prEN 14420-7:2025 (E)
NOTE If the requirements of this document are met, compatibility between couplers and adapters from
different manufacturers is ensured. Apart from gaskets, the interchangeability between spare parts from different
manufacturers cannot be ensured.
4.2 Temperatures
Range of working temperatures of couplings equipped with nitrile butadiene rubber gasket
(NBR-gasket): −20 °C to +65 °C.
5 Survey
Figure 1 and Figure 2 show examples for cam-locking couplings. A parts list is given in Table 1.

NOTE Chain optional.
Figure 1 — Coupler type DF and adapter type DP (dust plug)
prEN 14420-7:2025 (E)
NOTE Chain optional.
Figure 2 — Coupler type DC and ad
...