GB25501-2019

Minimum allowable values of water efficiency and water efficiency grades for faucets

水嘴水效限定值及水效等级

GB 25501-2019 é uma norma nacional chinesa obrigatória vigente: Minimum allowable values of water efficiency and water efficiency grades for faucets. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de jan. de 2021.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to the water efficiency evaluation of faucets installed at the end of cold and hot water supply pipelines in buildings, operating under a nominal pressure of ≤1.0MPa and media temperatures of 4°C to 90°C. It specifically covers washbasin faucets, kitchen faucets, bidet faucets, and ordinary washing faucets. This standard is not applicable to faucets with delayed self-closing functions. It references GB/T 33733 for relevant terminology and classification.

Requisitos técnicos

GB 25501-2019 specifies the minimum allowable values of water efficiency and water efficiency grades for faucets. The standard classifies water efficiency into three grades, with Grade 1 being the most efficient and Grade 3 representing the minimum allowable limit. Manufacturers must ensure their products meet at least Grade 3 requirements to enter the Chinese market. Key technical parameters include flow uniformity, which requires that the difference between the maximum and minimum average flow under varying pressures does not exceed specified limits for certain faucet types. Additionally, the standard defines the evaluating values of water conservation, corresponding to Grade 2 requirements, to identify water-saving products. For multi-gear faucets, the water efficiency grade is determined by the large gear's actual performance, which must not be lower than Grade 3.

Métodos de ensaio

The standard outlines specific testing procedures to verify compliance. The flow rate test is conducted under a dynamic pressure of (0.10±0.01) MPa, with different measurement steps for single-handle, double-handle, and non-contact faucets. The flow uniformity test evaluates the faucet at dynamic pressures of 0.30 MPa, 0.20 MPa, and 0.10 MPa, calculating the difference between the highest and lowest average flow rates. All tests must be performed using apparatus compliant with the specifications in Appendix A, ensuring measurement accuracy for flow, pressure, and temperature.

Perguntas frequentes

What products are regulated under GB 25501-2019?

It regulates washbasin, kitchen, bidet, and ordinary washing faucets used in building water supply systems, specifically excluding delayed self-closing faucets.

What are the water efficiency grades defined in this standard?

The standard defines three grades. Grade 1 is the highest efficiency, Grade 2 is the water-saving evaluation value, and Grade 3 is the minimum allowable value required for market access.

Are there any updates from the previous GB 25501-2010 version?

Yes, the 2019 version updates the scope, terminology, basic requirements, flow uniformity indicators, and water efficiency grade indicators to align with current water conservation goals.

The summary above provides a high-level overview of GB 25501-2019. To ensure complete compliance for your faucets entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 25501-2019 today to access all detailed parameters, flow rate tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Segurança
CCS: Y71
ICS: 91.060
Órgão competente: Standardization Administration of China
Comitê técnico: National Technical Committee on Water Conservation of Standardization Administration of China

Relações

Substitui:GB 25501-2010