Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-105964 ISO 683‑2 is the second

ISO 683‑2 is the second part of a series of documents on heat-treatable steels

1 Number and dimensions of test specimens

This International Standard supersedes BS EN 20898-1:1992 which is withdrawn

BS EN 17111 provides a carrier test for establishing whether a chemical disinfectant for use on instruments (surgical instruments

The methods mentioned in BS EN 50281-2-1

Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-105964 ISO 683‑2 is the second1 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