GB/T 39924-2021 English PDFUS$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39924-2021: Technical requirements of water saving evaluation for rotating sprinklers Status: Valid
Basic dataStandard ID: GB/T 39924-2021 (GB/T39924-2021)Description (Translated English): Technical requirements of water saving evaluation for rotating sprinklers Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: B91 Word Count Estimation: 6,638 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 39924-2021: Technical requirements of water saving evaluation for rotating sprinklers---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Technical requirements of water saving evaluation for rotating sprinklers ICS 65.060.35 B91 National Standards of People's Republic of China Technical Requirements for Water Saving Evaluation of Rotary Sprinklers Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Water Conservation Standardization Technical Committee (SAC/TC442). Drafting organizations of this standard. Guangdong Dahua Ecological Technology Co., Ltd., Shanghai Urban Construction Vocational College, Funan COSCO Kitchen and Bath Co., Ltd., Guangdong Dahua Huajie Water Technology Co., Ltd., Taizhou Jinge Plumbing Co., Ltd., Taizhou Quantitative Technology Information Service Co., Ltd., Beijing Lvyuan Plastic Co., Ltd. Ren company, China National Institute of Standardization, National Drainage, Irrigation and Water-saving Equipment Product Quality Supervision and Inspection Center, Anhui Province Product Quality Supervision, Inspection and Research Institute Research Institute, Zhejiang Shengxue Leisure Products Co., Ltd., Standard Joint Consulting Center Co., Ltd., China Institute of Water Resources and Hydropower Research. The main drafters of this standard. Wang Yu, Zhu Shuangsi, Fang Huaming, Liu Yalong, Liu Shanyu, Hu Mengting, Cai Rong, Jiang Shanhu, Wang Liuyun, Ma Shiyong, Feng Zhengwen, Pan Huaicong, Ding Zheyu, Jiang Youhua, Lang Zeen, Yang Bopu, Zhao Yan, Ku Guogang, Liu Zhifeng, Li Yongyu, Han Bangjun, Wang Ping, Qiu Liqin, Wei Zhidong, Zhu Xiaohui, Pan Huaiwei, Lu Chengxu, Wang Qingming, Jiang Shan. Technical Requirements for Water Saving Evaluation of Rotary Sprinklers1 ScopeThis standard specifies the technical requirements and test methods for water-saving evaluation of rotary sprinklers. This standard is applicable to the water-saving evaluation of various types of rotary sprinklers for irrigation.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 19795.1 Rotary sprinklers for agricultural irrigation equipment Part 1.Structure and operation requirements3 Terms and definitionsThe terms and definitions defined in GB/T 19795.1 apply to this document.4 Technical requirements4.1 Basic requirements The material, structure and process, interface thread, performance requirements (including working pressure and driving mechanism) of the water-saving rotary nozzle are suitable for Nozzle with one or more nozzles), structure and parts, interface thread bearing performance, normal temperature pressure resistance, high temperature pressure resistance, nozzle interface sealing, The water distribution characteristics, spray height, working pressure range and durability shall meet the requirements of GB/T 19795.1. 4.2 Nozzle tightness The sealing performance of the water-saving rotary sprinkler should meet the requirements of Table 1. Table 1 Sealing requirements of nozzles Serial number evaluation index water saving evaluation value Leakage at the rotating bearing (Nominal flow Q≤0.25m3/h) ≤0.004m3/h The leakage at the rotating bearing is relative to the nozzle flow rate under the test pressure (0.25m3/h< nominal flow Q≤5.0m3/h) ≤1.5% The leakage at the rotating bearing is relative to the nozzle flow rate under the test pressure (5.0m3/h< nominal flow Q≤30m3/h) ≤0.8% The leakage at the rotating bearing is relative to the nozzle flow rate under the test pressure (Nominal flow Q >30m3/h) ≤0.4% ...... |
