SIST EN 14420-7:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schlaucharmaturen mit Klemmfassungen - Teil 7: HebelarmkupplungenRaccords pour flexibles avec demi-coquille - Partie 7: Raccords a camesHose fittings with clamp units - Part 7: Cam locking couplings23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and jointsICS:Ta slovenski standard je istoveten z:EN 14420-7:2004SIST EN 14420-7:2005en01-marec-2005SIST EN 14420-7:2005SLOVENSKI
STANDARD



SIST EN 14420-7:2005



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14420-7November 2004ICS 23.040.70English versionHose fittings with clamp units - Part 7: Cam locking couplingsRaccords pour flexibles avec demi-coquille - Partie 7:Raccords à camesSchlaucharmaturen mit Klemmfassungen - Teil 7:HebelarmkupplungenThis European Standard was approved by CEN on 30 September 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14420-7:2004: ESIST EN 14420-7:2005



EN 14420-7:2004 (E) 2 Contents page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Requirements.5 3.1 Construction.5 3.2 Temperatures.6 4 Survey.6 5 Types of connection, survey.8 6 Designation.9 7 Dimensions.9 7.1 General.9 7.2 Coupler types.9 7.3 Cam arm (item No 2).12 7.4 Pin (item No 3).13 7.5 Ring (item No 4).14 7.6 Main gasket (item No 5).14 7.7 Thread gasket (item No 6).15 7.8 Adapter types.15 8 Materials.18 8.1 General.18 8.2 Coupler and adapter body.18 8.3 Cam arm (item No 2).18 8.4 Pin (item No 3).18 8.5 Ring (item No 4).18 8.6 Main gasket (item No 5).18 8.7 Thread gasket (item No 6).19 9 Marking.19 10 Type approval testing and quality control.19 Annex A (normative)
Gauges for cam-locking couplings.20 A.1 Dimensions and designation.20 A.2 Material.21 Bibliography.22
SIST EN 14420-7:2005



EN 14420-7:2004 (E) 3 Foreword This document (EN 14420-7:2004) 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 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. EN 14420 consists at the time of publication of the following parts: EN 14420-1, Hose fittings with clamp units — Part 1: Requirements, survey, designation and testing EN 14420-2, Hose fittings with clamp units — Part 2: Hose side parts of hose tail EN 14420-3, Hose fittings with clamp units — Part 3: Clamp units, bolted or pinned EN 14420-4, Hose fittings with clamp units — Part 4: Flange connections EN 14420-5, Hose fittings with clamp units — Part 5: Threaded connections EN 14420-6, Hose fittings with clamp units — Part 6: TW tank truck couplings EN 14420-7, Hose fittings with clamp units — Part 7: Cam locking couplings EN 14420-8, Hose fittings with clamp units — Part 8: Symmetrical half coupling (Guillemin system) According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14420-7:2005



EN 14420-7:2004 (E) 4 Introduction Cam locking couplings are manufactured worldwide according to the American "military specification" MIL-C-27487. This American standard fixes only the coupling side, but not the connection side. Other parts like levers, bolts, ring and seals are not standardized. SIST EN 14420-7:2005



EN 14420-7:2004 (E) 5
1 Scope This document details the design, materials and dimensions for cam locking couplings that serve as the link between hoses and connections to transport liquids, solids and gases, except liquid gas and steam. The couplings are capable of operating the pressure range − 0,8 bar to 25 bar working pressure in a working temperature range of − 20 °C up to + 65 °C. WARNING — Line pressure shall be reduced before disconnection. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1982, Copper and copper alloys — Ingots and castings EN 10083-2, Quenched and tempered steel — Part 2: Technical delivery conditions for unalloyed quality steels (includes amendment A1:1996) EN 10088-1, Stainless steels — Part 1: List of stainless steels EN 10213-4, Technical delivery conditions for steel castings for pressure purposes — Part 4: Austenitic and austenitic-ferritic steel grades EN 10226-1, Pipe threads where pressure tight joints are made on the threads — Part 1:Taper external threads and parallel internal threads -
Dimensions, tolerances and designation EN 12420, Copper and copper alloys — Forgings EN 14420-1, Hose fittings with clamp units — Part 1: Requirements, survey, 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 ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 272, Fasteners — Hexagon products — Widths across flats EN 22768-1, General tolerances — Part 1:Tolerances for linear and angular dimensions without individual tolerance indications EN 22768-2, General tolerances — Part 2:Geometrical tolerances for features without individual tolerance indications 3 Requirements 3.1 Construction The curves of the lever and the adapters as well as the dimensions of the sealing ring shall be harmonized such that twisting of the hose and vibrating during operation shall not lead to leakage. Self-acting uncoupling shall be excluded. SIST EN 14420-7:2005



EN 14420-7:2004 (E) 6 Cam arms shall be suitable to operate without using tools. For gauges for cam-locking couplings according to this standard see Annex A. NOTE If the requirements of this standard are met, compatibility between couplers and adapters from different manu-facturers is assured. Apart from gaskets the interchangeability between spare parts from different manufacturers cannot be assured. 3.2 Temperatures Range of working temperatures of couplings equipped with NBR rubber gasket: − 20 °C to + 65 °C. Out of these limits the manufacturer shall be consulted. 4 Survey
Key See Table 1 NOTE Chain optional. Figure 1 — Coupler type DF
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