The purpose of this document is to specify:
field of application of anti-pollution check valves;
backflow prevention properties, dimensional and physio-chemical properties, and properties of general
hydraulic, mechanical and acoustic design for anti-pollution check valves of nominal sizes DN 6 to
DN 250 inclusive;
family E, type A, controllable anti-pollution check valve (with test port);
family E, type B, non-controllable anti-pollution check valve, including cartridge check valve;
family E, type C, controllable anti-pollution double check valve (with test ports);
family E, type D, non-controllable anti-pollution double check valve, including cartridge double check
valve;
test procedures and requirements for verifying the backflow protection properties of stop valves, draw-off
taps etc. which incorporate a check valve function. Stop valves, draw off taps etc, need also to comply
with a recognised standard;
marking;
presentation at delivery.
This document specifies the characteristics of anti-pollution check valves of DN 6 up to and including DN 250 that
are suitable for use in drinking water systems. For application feasibility see Table 1.
temperature Max. Operating pressure Installation
DN <= 50 65 °C + 90 °C, 1 h 1 000 kPa (10 bar) Any position
DN > 50 65 °C 1 000 kPa (10 bar) Horizontal only
Anti-pollution check valves covered by this document are of pressure class PN 10. In case of devises with pressure
class PN 16, the anti¿pollution check valves has to comply with the tests which characterise the PN of the
devise.
The field of application of EN 1717 is limited to 10 bar, flanges could be drilled in PN 16 pattern.
Diese Europäische Norm legt die Anforderungen an Rückflussverhinderer der Nennweiten DN 6 bis einschließlich DN 250 fest, die für die Verwendung in Trinkwasser-Versorgungsleitungen bei Drücken bis einschließlich 1000 kPa (10 bar) und Temperaturen bis einschließlich 65 °C geeignet sind, sowie an Rückflussverhinderer bis einschließlich DN 50, die eine Stunde lang Temperaturen bis einschließlich 90 °C ausgesetzt sind, wobei der Einbau in beliebiger Richtung erfolgen kann.