BS EN 14367:2005 PDF

Scope: This document specifies the: field of application; the dimensional, the physico-chemical, the design, the hydraulic, the mechanical and the acoustic characteristics of non-controllable backflow preventer with different pressure zones, family C, type A, nominal sizes DN 6 to DN 50, 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 supply temperature limit of 65 °C and 90 °C for 1 h;  Family C, type A, class "b" for specific use: devices of class "b" shall be capable of working: at any downstream pressure up to 0,3 MPa (3 bar); with any downstream pressure variation up to 0,3 MPa (3 bar); The devices of class "b" having specific hydraulic and no acoustic requirements and are meant for equipped filling devices built-in one or two functions boilers (heating only or heating and production of sanitation hot water). It concerns boilers with a 70 kW maximum power and maximum temperature of 110°C. It specifies also:  test methods and requirements for verifying these characteristics;  marking;  presentation and the delivery.

BS EN 14367:2005 Referenced Document

EN 1254-4 Copper and copper alloys - Plumbing fittings - Part 4: Threaded fittings*， 2021-04-30 Update
EN 1267:1999 Valves - Test of Flow Resistance Using Water as Test Fluid
EN 13959 Anti-pollution check valves - DN 6 to DN 250 inclusive family E, type A, B, C and D*， 2024-04-18 Update
EN 1717:2000 Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow*， 2024-04-18 Update
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

2006 BS EN 14367:2005 Non controllable backflow preventer with different pressure zones - Family C, type A