GB/T 18691.5-2021 English PDFUS$284.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 18691.5-2021: Agricultural irrigation equipment - Irrigation valves - Part 5: Control valves Status: Valid GB/T 18691.5: Historical versions
Basic dataStandard ID: GB/T 18691.5-2021 (GB/T18691.5-2021)Description (Translated English): Agricultural irrigation equipment - Irrigation valves - Part 5: Control valves Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: B91 Word Count Estimation: 14,121 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 18691.5-2021: Agricultural irrigation equipment - Irrigation valves - Part 5: Control valves---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.Agricultural irrigation equipment -- Irrigation valves -- Part 5: Control valves ICS 65:060:35 CCSB91 National Standards of People's Republic of China Replacing GB/T 18691:5-2011 Agricultural irrigation equipment irrigation valve Part 5: Control Valves (ISO 9635-5:2014, IDT) Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted: This document is part 5 of GB/T 18691 "Irrigation Valves for Agricultural Irrigation Equipment": GB/T 18691 has released the following parts: --- Part 1: General requirements; --- Part 2: Isolation valve; --- Part 3: Check valve; --- Part 4: Intake and exhaust valves; --- Part 5: Control valve: This document replaces GB/T 18691:5-2011 "Irrigation Valves for Agricultural Irrigation Equipment - Part 5: Control Valves", and GB/T 18691:5- Compared with:2011, except for structural adjustment and editorial changes, the main technical changes are as follows: --- Changed the flow coefficient requirements (see 5:3:1, 5:3:1 of the:2011 edition); --- Changed the hydraulic characteristics of the control valve with flow adjustment function (see 5:3:2:1, 5:3:2:1 of the:2011 edition); --- Changed the hydraulic characteristics of the control valve with pressure adjustment function (see 5:3:2:2, 5:3:2:2 of the:2011 edition); --- Changed the hydraulic characteristics of the control valve with the liquid level adjustment function (see 5:3:2:3, 5:3:2:3 of the:2011 edition); --- Changed the durability test method of the control valve (see Appendix D, Appendix D of the:2011 edition): This document uses the translation method identically to ISO 9635-5:2014 "Irrigation Valves for Agricultural Irrigation Equipment - Part 5: Control Valves": The Chinese documents that have a consistent correspondence with the international documents normatively cited in this document are as follows: ---GB/T 18688-2012 Test method for pressure loss of irrigation valves of agricultural irrigation equipment (ISO 9644:2008, IDT) The following editorial changes have been made to this document: --- Replace "bar" with "MPa" conversion; --- Corrected typographical errors in the original International Standard (see 5:1, 5:2:1, 5:2:2, 5:2:4, 5:4); --- Corrected the typographical error in the original international standard: changed the first column of Table 2 mentioned in Chapter 5 of GB/T 18691:1-2021 Article number: Please note that some content of this document may be patented: The issuing agency 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 is drafted by: Ningbo Yaofeng Hydraulic Electric Co:, Ltd:, Jiangsu Huayuan Water Saving Co:, Ltd:, Huawei Water Saving Technology Group Co:, Ltd: Co:, Ltd:, China Academy of Agricultural Mechanization, Wenling Pengzhuo Electromechanical Technology Co:, Ltd:, Jiangsu University Fluid Machinery Engineering Technology Research Center, Anhui Provincial Institute of Product Quality Supervision and Inspection, Taishan Intelligent Manufacturing Industry Research Institute, Visega (Shandong) Intelligent Technology Co:, Ltd: company: The main drafters of this document: Zhang Feng, Qiu Zhipeng, Lu Mingli, Zhang Xiansheng, Ying Huiliang, Cao Puyu, Zhao Liwei, Ning Chao, Wang Yang, Lu Shusheng, Li Mingyu, Wei Fukui, Zhang Dongxu, Wei Yuanchao: The previous versions of this document and its superseded documents are as follows: ---First published in:2005 as GB/T 19793-2005, and first revised as GB/T 18691:5-2011 in:2011; ---This is the second revision:IntroductionGB/T 18691 "Irrigation Valves for Agricultural Irrigation Equipment" is planned to be composed of the following five parts according to product characteristics: --- Part 1: General requirements: The purpose is to give general requirements for the design, performance and consistency evaluation of irrigation valves: --- Part 2: Isolation valve: The purpose is to give the requirements for the design, performance and consistency evaluation of the isolation valve, and to give the unique characteristics of the isolation valve: technical requirements: --- Part 3: Check valve: The purpose is to give the design, performance, consistency evaluation and other requirements of the check valve, and to give the unique characteristics of the check valve: technical requirements: --- Part 4: Intake and exhaust valves: The purpose is to give the design, performance, consistency evaluation and other requirements of the intake and exhaust valves, and to give the intake and exhaust valves: Valve-specific technical requirements: --- Part 5: Control valve: The purpose is to give the design, performance, consistency evaluation and other requirements of the control valve, and to give the unique characteristics of the control valve: technical requirements: Among them, GB/T 18691:1 specifies the general requirements for irrigation valves: Except for the common requirements of general requirements, the rest of the standards are based on the general requirements of irrigation valves: The category specifies the specific technical requirements for this type of irrigation valve: Based on GB/T 18691:1, GB/T 18691 completely gives four types of agricultural products including isolation valve, check valve, intake and exhaust valve, and control valve: The technical requirements and evaluation methods of industrial irrigation valves provide a standard basis for the manufacture and product upgrading of agricultural irrigation valves: Agricultural irrigation equipment irrigation valve Part 5: Control Valves1 ScopeThis document specifies the design requirements, performance requirements, conformity assessment, marking and packaging of control valves: The control valve is suitable for water temperature not exceeding above 60°C and the water may contain certain types and concentrations of fertilizers or chemicals commonly used in agriculture: This document applies to hydraulically actuated irrigation control valves with a nominal size of not less than DN15: The control valve is designed to work from full Open to fully closed anywhere: Valves can be operated directly (e:g: via a spring or diaphragm) or pilot operated (e:g: via a diaphragm) The opening and closing parts are controlled by an adjustable pilot valve): The valve can also be used as a check valve:2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document: GB/T 18691:1-2021 Irrigation Valves for Agricultural Irrigation Equipment Part 1: General Requirements (ISO 9635-1:2014, IDT) GB/T 18691:2-2021 Irrigation Valves for Agricultural Irrigation Equipment Part 2: Isolation Valves (ISO 9635-2:2014, IDT) ISO 9644 Test method for pressure loss of irrigation valves in agricultural irrigation equipment (Agriculturalirrigationequipment- Pressurelossesinirrigationvalves-Testmethod)3 Terms and DefinitionsThe terms and definitions defined in GB/T 18691:1-2021 and the following terms and definitions apply to this document: 3:1 control valve A valve with one or more regulating functions within a specified range: Note: Regulation functions include flow regulation, liquid level control and pressure regulation (upstream or downstream): Valves are also used to turn irrigation systems on or off: 3:1:1 automatic control valve A control valve (3:1) that realizes automatic control by adjusting the position of the opening and closing parts to obtain the energy of transmitting water: 3:1:2 Non-autonomouscontrolvalve A control valve (3:1) that requires external energy to adjust the position of the opening and closing parts to achieve specific function adjustment: 3:1:3 pressure-reducing valve Control valve (3:1) that depressurizes the higher inlet pressure to the lower outlet pressure (independent of changes in flow or inlet pressure): 3:1:4 pressure-sustaining valve Control valve (3:1) for keeping the inlet pressure constant regardless of changes in flow or outlet pressure: ...... |
