Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-202139 modified bitumen

modified bitumen

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

BS EN 2139 is a European Standard series that covers flat heat-resisting steel washers for aerospace applications

ensuring safety and security in passenger cars

Anti-pollution check valves. DN 6 to DN 250 inclusive Family E, type A, B, C, and D Ingestion-build-202139 modified bitumen1 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