Over deze norm
This European Standard specifies: a) the field of application; b) the requirements of hose union anti vacuum valves; c) dimensional and physio-chemical properties, and properties of general hydraulic, mechanical and acoustic design of hose union anti-vacuum valves of nominal sizes DN 15 up to and including DN 25; d) marking and technical product information. This standard specifies the characteristics of hose union anti-vacuum valves of nominal size DN 15 up to and including DN 25 that are suitable for use in drinking water systems at pressures up to and including 1 MPa (10 bar) and temperatures up to and including 65 ?C and for 1 h at 90 ?C. HB protects against back siphonage only and should be installed in vertical downward flow position. HB and HD anti-vacuum valves are for installation exclusively at the connecting point between stop valve and hose in vertical downward flow position.
|Nederlandse titel||Middelen ter voorkoming van verontreiniging van drinkwater door terugstroming - Slangkoppeling met anti-vacu?mklep - DN 15 tot DN 25 inclusief Familie H, type B en type D - Algemene technische specificatie|
|Engelse titel||Devices to prevent pollution by backflow of potable water - Hose Union anti-vacuum valves - DN 15 to DN 25 inclusive Family H, type B and type D - General technical specification|