DIN EN 14452-2005 防饮用水回流污染的装置.带大气压力孔和移动元件的管阻流器DN10至DN 20. B型D系列
Devices to prevent pollution by backflow of potable water - Pipe interrupter with atmospheric vent and moving element DN 10 to DN 20 - Family D, type B; German version EN 14452:2005
This European standard specifies the characteristics of pipe interrupters with atmospheric vent and moving element of nominal size DN 10 to DN 20 that are suitable for use in drinking water systems at pressures up to 1 MPa (10 bar) and temperatures up to 65 ?and for 1 h at 90 ?