Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-202139 — characteristics to be declared

— characteristics to be declared by the manufacturers of ultrasonic dental descalers

BS IEC 1000-5-4 on protective devices is useful for:

modified bitumen

BS ISO 5834-2:2019 has made some technical changes compared to ISO 5834-2:2011

Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-202139 — characteristics to be declared1 Scope 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