7.3 分类 Classification

7.3.1 概述 General

WC flushing valves are classified according to their flush volume.

National Regulations exist in some EU member states that set maximum flush volumes that are lower than those indicated in this European Standard.

7.3.2 6 6L 和 6L 至 9L 阀门 l and 6 to 9 l valves

If a valve is intended to deliver 6 l of water or is adjustable to deliver flush volumes from 6 l to 9 l, it shall be designated as “Class 6”.

7.3.3 9 9L 阀门 l valves

If a valve is intended to deliver 9 l it shall be designated as “Class 9”.