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.
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*， 2024-04-19 Update
EN 1717:2000 Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow*， 2024-04-19 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
EN ISO 3822-1:1999 Acoustics ?Laboratory tests on noise emission from appliances and equipment used in water supply installations ?Part 1: Method of measurement Incorporates Amendment A1: 2008
EN ISO 3822-3:1997 Acoustics - Laboratory Tests on Noise Emission from Appliances and Equipment Used in Water Supply Installations - Part 3: Mounting and Operating Conditions for In-Line Valves and Appliances Incorporates Amendment A1: 2009
EN ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2022)*， 2022-06-29 Update
EN ISO 6509 Corrosion of Metals and Alloys - Determination of Dezincification Resistance of Brass (ISO 6509:1981)
ISO 7-1 Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation TECHNICAL CORRIGENDUM 1
ISO 965-1 ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data — Amendment 1*， 2021-09-29 Update
EN 14367:2005 history
2005EN 14367:2005 Non controllable backflow preventer with different pressure zones - Family C, type A