Standard

NS-EN 14367:2005

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Abstract

This European standard specifies the : _ field of application ; _ the dimensional, the physico-chemical, the design, the hydraulic, the mechanical and the acoustic characteristics of backflow preventer with different non-controllable pressure zones family C type A and of nominal sizes DN 6 to DN 50 inclusive and in nominal pressure PN 10. It is applicable to : _ Family C , type A , class "a" for general use : devices of class "a" shall be capable of working : _ at any pressure up to 1 Mpa (10 bar) ; _ with any pressure variation up to 1 Mpa (10 bar) ; _ at a temperature limit of 65 ░C and 90 ░C for 1 h ; _ Family C , type A , class "b" for restricted temporary use : devices of class "b" shall be capable of working : _ at any downstream pressure up to 300 kPa (3 bar) ; _ with any downstream pressure variation up to 300 kPa (3 bar) ; The devices of class "b" to have restricted hydraulic and no acoustic requirements and are designated for water supply to systems with a temperature limit of 110 ░C. It specifies also _ the test methods and requirements for verifying these characteristics ; _ the marking ; _ the presentation and the delivery.

Document information

  • Standard from SN
  • Published:
  • Edition: 1
  • Version: 1
  • Document type: NAT
  • ICS 91.140.60
  • National Committee SN/K 98

Legal references

EU law: 89/106/EEC

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