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GB/T 18691.5-2021: Agricultural irrigation equipment - Irrigation valves - Part 5: Control valves
Status: Valid GB/T 18691.5: Evolution and historical versions
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| GB/T 18691.5-2021 | English | 284 |
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Agricultural irrigation equipment - Irrigation valves - Part 5: Control valves
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GB/T 18691.5-2021
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| GB/T 18691.5-2011 | English | 559 |
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Agricultural irrigation equipment -- Irrigation valves -- Part 5: Control valves
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GB/T 18691.5-2011
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PDF similar to GB/T 18691.5-2021
Basic data | Standard 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
foreword
This 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:
Introduction
GB/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 Valves
1 Scope
This 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 references
The 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 Definitions
The 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:
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