GB/T 19794-2023 English PDFUS$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 19794-2023: Agricultural irrigation equipment - Volumetric valves - General requirements and test methods Status: Valid GB/T 19794: Historical versions
Basic dataStandard ID: GB/T 19794-2023 (GB/T19794-2023)Description (Translated English): Agricultural irrigation equipment - Volumetric valves - General requirements and test methods Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: B91 Classification of International Standard: 65.060.35 Word Count Estimation: 14,143 Date of Issue: 2023-11-27 Date of Implementation: 2024-06-01 Older Standard (superseded by this standard): GB/T 19794-2012 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 19794-2023: Agricultural irrigation equipment - Volumetric valves - General requirements and test methods---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. ICS 65:060:35 CCSB91 National Standards of People's Republic of China Replace GB/T 19794-2012 Agricultural irrigation equipment metering valve Technical requirements and test methods (ISO 7714:2018,IDT) Published on 2023-11-27 2024-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 19794-2012 "Technical Requirements and Test Methods for Dosing Valve of Agricultural Irrigation Equipment" and is consistent with Compared with GB/T 19794-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Changed scope (see Chapter 1, Chapter 1 of the:2012 edition) b) Some terms and definitions have been changed (see 3:1, 3:9, 3:13, 3:1, 3:9, 3:13 of the:2012 version); c) Changed the general requirements for metering valves (see 6:1, 6:1 of the:2012 edition); d) Changed the requirements for interface threads (see 6:2,:2012 version of 6:2); e) The test method for non-sequential metering valves has been changed (see 7:5:1:1,:2012 version of 7:5:1:1); f) The test procedure for pressure loss has been changed (see 7:7:2,:2012 version of 7:7:2): This document is equivalent to ISO 7714:2018 "Technical Requirements and Test Methods for Dosing Valve of Agricultural Irrigation Equipment": Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by China Machinery Industry Federation: This document is under the jurisdiction of the National Agricultural Machinery Standardization Technical Committee (SAC/TC201): This document was drafted by: China Academy of Agricultural Mechanization Sciences Group Co:, Ltd:, Jiangsu University Fluid Mechanical Engineering Technology Research Center Heart, Wenling Fangyuan Testing Co:, Ltd:, Youli Mechanical and Electrical Co:, Ltd:, Wenling Pengzhuo Mechanical and Electrical Technology Co:, Ltd:, Wenling Product Quality Inspection Institute, Zhejiang Provincial Pump and Valve Product Quality Inspection Center: The main drafters of this document: Zhang Xiansheng, Wu Wenjing, Li Guidong, Wang Guojun, Cui Kang, Chen Xianjun, Ying Huiliang, Wang Yang, Fang Yujian, Chen Lingtong, Zhu Jianjun, Yuan Shouqi, Li Hong, Lu Shusheng, Xing Li, Zhao Liwei: This document was first published in:2005, revised for the first time in:2012, and this is the second revision: Agricultural irrigation equipment metering valve Technical requirements and test methods1 ScopeThis document specifies the technical requirements and test methods for metering valves capable of automatically delivering a preset amount of water: This document applies to metering valves driven only by pressurized water flow in the pipeline without any other external energy source: Note: The metering valve is usually required to operate normally under various flow rates and temperatures in the range of 5°C to 50°C using irrigation water of different qualities:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 40115-2021 Irrigation water meter (ISO 16399:2014, IDT) Note: GB/T 7306:1-2000 55° sealed pipe threads Part 1: Cylindrical internal threads and conical external threads (eqvISO 7-1:1994) GB/T 7306:2-2000 55° sealed pipe threads Part 2: Conical internal threads and conical external threads (eqvISO 7-1:1994) Note: GB/T 18688-2012 Pressure loss test method for irrigation valves of agricultural irrigation equipment (ISO 9644:2008, IDT)3 Terms and definitionsThe following terms and definitions apply to this document: 3:1 quantitative valve volumetricvalve An irrigation valve that can automatically deliver a preset amount of water within a flow range by measuring the amount of water flowing through the valve: 3:2 Dosing valve A dosing valve (3:1) capable of sequential operation in an irrigation system: 3:2:1 In a parallel dosing valve irrigation system, there is a sequential dosing valve (3:2) with one inlet and one outlet: When the valve is in the preset open position It is turned on with the help of hydraulic signal and will automatically close after reaching the preset water volume, and can transmit the hydraulic signal to the next quantitative valve in the system to make it run: 3:2:2 In a parallel dosing valve irrigation system, there is a sequential dosing valve (3:2) with one inlet and one outlet: When the valve is in the preset open position ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 19794-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 19794-2023_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 19794-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 19794-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
