Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 25501-2010 Minimum allowable values of water efficiency and water efficiency grades for faucets, and the following main technical changes have been made with respect to GB 25501-2010:
——the scope of standard is modified;
——some terms and definitions are modified;
——the basic requirements are modified;
——the index of uniformity of flow is modified.
——the index of water efficiency grade for faucet is modified;
This standard was proposed by the Standardization Administration of the People’s Republic of China and the Department of Resource Conservation and Environmental Protection of the National Development and Reform Commission of the People's Republic of China.
This standard is under the jurisdiction of the Standardization Administration of the People’s Republic of China.
This standard was firstly issued in January, 2011 and is revised for the first time.
Minimum allowable values of water efficiency and water efficiency grades for faucets
1 Scope
This standard specifies the minimum allowable values of water efficiency, evaluating values of water conservation, water efficiency grades and test methods for faucets.
This standard is applicable to the water efficiency evaluation of washbasin faucets, kitchen faucets, bidets faucets and ordinary washing faucets that are installed at ends of cold and hot water supply pipelines in buildings, with nominal pressure (static pressure) of not greater than 1.0 MPa and medium temperature of 4℃~ 90℃.
This standard is not applicable to water faucets with delayed self-closing function.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 33733 Terminology and classification for the kitchen and sanitary ware fittings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33733 and the following apply.
3.1
Uniformity of flow
△F
the difference between the highest average flow and the lowest average flow of the faucet under different test pressures
3.2
minimum allowable values of water efficiency for faucet
the maximum allowable flow of the faucet under the test conditions specified in the standard
3.3
evaluating values or water conservation for faucet
the maximum allowable flow of the water-conservation faucet under the test conditions specified in the standard
Note: The evaluating values of water conservation are a requirement for evaluating the water-conservation faucets.
4 Technical requirements
4.1 Basic requirements
Faucets shall meet the requirements of the standard prescribed expressly.
4.2 Uniformity of flow
As tested by Sub-clause 5.2, the uniformity of flow of the washbasin faucets, kitchen faucets and bidgets faucets shall not be greater than 3.0 L/min.
4.3 Water efficiency grades for faucets
4.3.1 The water efficiency for faucets is classified into 3 grades, with Grade 3 representing the lowest one.
4.3.2 As tested by Sub-clause 5.1, the flow of all grades of faucets shall be in accordance with those specified in Table 1.
4.3.3 The water efficiency grades for multi-stage faucets at a high stage shall not be lower than Grade 3, and the actual water efficiency grades achieved at a high stage shall be taken as the water efficiency grades for the faucets.
Table 1 Index of water efficiency grade for faucet In L/min
Type Flow
Grade 1 Grade 2 Grade 3
Washbasin faucet
Kitchen faucet
Bidgets faucet ≤4.5 ≤6.0 ≤7.5
Ordinary washing faucet ≤6.0 ≤7.5 ≤9.0
4.4 Minimum allowable values of water efficiency for faucet
The flow of the faucet specified by water efficiency grade 3.
4.5 Evaluating values of water conservation for faucet
The flow of the faucet specified by water efficiency grade 2.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods Annex A (Normative) Faucet test apparatus
ICS 91.060 Y 71 中华人民共和国国家标准 GB 25501—2019 代替 GB 25501—2010 水嘴水效限定值及水效等级 Minimum allowable values of water efficiency and water efficiency grades for faucets 2019-12-31发布 2020-07-01实施 国家市场监督管理总局 国家标准化管理委员会 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准代替GB 25501—2010《水嘴用水效率限定值及用水效率等级》，与GB 25501—2010相比，主要技术变化如下： ——修改了标准的范围； ——修改了部分术语和定义； ——修改了基本要求； ——修改了流量均匀性指标； ——修改了水嘴水效等级指；际。 本标准由中国国家标准化管理委员会、中华人民共和国国家发展和改革委员会资源节约和环境保护司提出。 本标准由国家标准化管理委员会归口。 本标准于2011年1月首次发布，本次为第一次修订。 水嘴水效限定值及水效等级 1 范围 本标准规定了水嘴的水效限定值、节水评价值、水效等级和试验方法。 本标准适用于安装在建筑物内的冷、热水供水管路末端，公称压力(静压)不大于1.0 MPa，介质温度为4℃～90℃条件下的洗面器水嘴、厨房水嘴、妇洗器水嘴和普通洗涤水嘴的水效评价。 本标准不适用于具有延时自闭功能的水嘴。 2规范性引用文件 下列文件列’于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。 GB/T 33733厨卫五金产品术语与分类 3术语和定义 GB/T 33733界定的以及下列术语和定义适用于本文件。 3.1 流量均匀性uniformity of flow △F 在不同试验压力下，水嘴的最高平均流量与最低平均流量之差。 3.2 水嘴水效限定值 minimum allowable values of water efficiency for faucet 在标准规定的测试条件下，水嘴所允许的最大流量。 3.3 水嘴节水评价值evaluating values or water conservation for Faucet 在标准规定的测试条件下，节水型水嘴所允许的最大流量。 注：节水评价值是评价节水型水嘴的规定要求。 4 技术要求 4.1基本要求 水嘴应符合明示执行标准的要求。 4.2流量均匀性 按5.2进行测试，洗而器水嘴、厨房水嘴、妇洗器水嘴的流量均匀性应不大于3.0 L/min。 4.3水嘴水效等级 4.3.1 水嘴的水效等级分为3级，其中3级水效最低。 4.3.2按5.1进行测试，各等级水嘴的流量应符合表1的规定。 4.3.3多挡水嘴的大挡水效等级不应低于3级，以大挡实际达到的水效等级作为该水嘴的水效等级级别。 表1 水嘴水效等级指标 单位为升每分 类别 流量 1级 2级 3级 洗面器水嘴 厨房水嘴 妇洗器水嘴 ≤4.5 ≤6.0 ≤7.5 普通洗涤水嘴 ≤6.0 ≤7.5 ≤9.0
