1 Scope
This standard specifies the minimum allowable values of water efficiency, water-saving evaluation value, water efficiency grades, technical requirements and test methods of mechanical flush valve for water closet or urinals, pressurized type flush valve for water closet or urinals and non-contact flush valve for water closet or urinals.
This standard is applicable to flush valve for water closets or urinals installed on water supply pipelines of building facilities, with water supply pressure ≤0.9MPa and medium temperature ≤40°C.
2 Normative references
The following referenced document is indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
flush valve for water closets or urinals
control device to realize the toilet flushing function, which is a type of flushing valve
3.2
mechanical flush valve for water closet or urinals
flush valve for water closet or urinals that need to be started by direct contact, including pedal, button and handle
3.3
pressurized type flush valve for water closet or urinals
flush valve for water closets or urinals that flushes by only pressurized water in a closed box filled with water in advance by water supply pressure
Foreword iii
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test method
6 Description of water efficiency grade
