EN ISO 4126-4:2004
(Main)Safety devices for protection against excessive pressure - Part 4: Pilot operated safety valves (ISO 4126-4:2004)
Safety devices for protection against excessive pressure - Part 4: Pilot operated safety valves (ISO 4126-4:2004)
ISO 4126-4:2003 specifies general requirements for pilot operated safety valves, other than those covered in ISO 4126-1, irrespective of the fluid for which they are designed. In all cases, the operation is carried out by the fluid in the system to be protected.
ISO 4126-4:2003 is applicable to pilot operated safety valves having a valve flow diameter of 6 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature.
This is a product standard and it is not concerned with applications for pilot operated safety valves.
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 4: Pilotgesteuerte Sicherheitsventile (ISO 4126-4:2004)
Dieser teil der Europäischen Norm legt allgemeine Anforderungen an andere pilotgesteuerte Sicherheitsventile als im Teil 1 behandelte fest, unabhängig von dem Medium, für das diese Ventile vorgesehen sind. Die Funktion wird in allen Fällen durch das Medium in dem zu schützenden System ausgelöst. Die Norm gilt für pilotgesteuerte Sicherheitsventile mit einem engsten Strömungsdurchmesser von mindestens 6 mm und für Ansprechdrücke von 0,1 bar und höher. Hinsichtlich der Temperatur bestehen keine Einschränkungen.
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 4: Soupapes de sûreté pilotées (ISO 4126-4:2004)
L'ISO 4126-4:2003 spécifie les prescriptions générales des soupapes de sûreté pilotées, autres que celles couvertes par l'ISO 4126-1, quel que soit le fluide pour lequel elles sont conçues. Dans tous les cas le fonctionnement est assuré par le fluide contenu dans le système à protéger.
L'ISO 4126-4:2003 est applicable aux soupapes de sûreté pilotées présentant un orifice d'écoulement de diamètre supérieur ou égal à 6 mm qui sont utilisables à des pressions de début d'ouverture de 0,1 bar effectif et au-dessus. Aucune limitation en température n'est fixée.
Il s'agit d'une norme de produit et elle ne s'adresse pas aux applications de soupapes de sûreté pilotées.
Naprave za varovanje pred visokim tlakom - 4. del: Predkrmiljeni varnostni ventili (ISO 4126-4:2004)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 4126-4:2004
01-september-2004
Naprave za varovanje pred visokim tlakom - 4. del: Predkrmiljeni varnostni ventili
(ISO 4126-4:2004)
Safety devices for protection against excessive pressure - Part 4: Pilot operated safety
valves (ISO 4126-4:2004)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 4: Pilotgesteuerte
Sicherheitsventile (ISO 4126-4:2004)
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 4:
Soupapes de sureté pilotées (ISO 4126-4:2004)
Ta slovenski standard je istoveten z: EN ISO 4126-4:2004
ICS:
13.240
SIST EN ISO 4126-4:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 4126-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2004
ICS 13.240
English version
Safety devices for protection against excessive pressure - Part
4: Pilot operated safety valves (ISO 4126-4:2004)
Dispositifs de sécurité pour protection contre les pressions Sicherheitseinrichtungen gegen unzulässigen Überdruck -
excessives - Partie 4: Soupapes de sûreté pilotées (ISO Teil 4: Pilotgesteuerte Sicherheitsventile (ISO 4126-4:2004)
4126-4:2004)
This European Standard was approved by CEN on 16 May 2003.
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 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 translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4126-4:2004: E
worldwide for CEN national Members.
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EN ISO 4126-4:2004 (E)
Contents
Page
1 Scope .4
2 Normative references .4
3 Terms and definitions.4
4 Symbols and units .9
5 Design .9
5.1 General.9
5.2 End connections .10
5.3 Minimum requirements for springs.12
5.4 Materials.12
6 Production testing .12
6.1 Purpose.12
6.2 General.12
6.3 Hydrostatic testing .12
6.4 Pneumatic testing .13
6.5 Adjustment of set or cold differential
...
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