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CJ/T 25-2018 English PDF

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CJ/T 25-2018: Hand flow adjusting valves for heating
Status: Valid

CJ/T 25: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
CJ/T 25-2018English329 Add to Cart 3 days [Need to translate] Hand flow adjusting valves for heating Valid CJ/T 25-2018
CJ/T 25-1999English479 Add to Cart 3 days [Need to translate] Hand flow adjusting valves for heating Obsolete CJ/T 25-1999
CJ 25.1-1989English199 Add to Cart 2 days [Need to translate] (Miscellaneous Domestic Water Quality Standards) Obsolete CJ 25.1-1989

PDF similar to CJ/T 25-2018


Standard similar to CJ/T 25-2018

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Basic data

Standard ID CJ/T 25-2018 (CJ/T25-2018)
Description (Translated English) Hand flow adjusting valves for heating
Sector / Industry Urban Construction Industry Standard (Recommended)
Classification of Chinese Standard P46
Classification of International Standard 91.140.10
Word Count Estimation 14,147
Date of Issue 2018-11-16
Date of Implementation 2019-05-01
Older Standard (superseded by this standard) CJ/T 25-1999
Regulation (derived from) Ministry of Housing and Urban-Rural Development Announcement 2018 No. 295
Issuing agency(ies) Ministry of Housing and Urban-Rural Development of the People's Republic of China

CJ/T 25-2018: Hand flow adjusting valves for heating

---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.
Hand flow adjusting valves for heating ICS 91.140.10 P46 People's Republic of China urban construction industry standards Replace CJ/T 25-1999 Manual flow regulating valve for heating Published on.2018-11-16 2019-05-01 implementation Ministry of Housing and Urban-Rural Development

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Classification and Marking 2 5 working conditions and working pressure difference 2 6 valve body structure and size 3 7 Material 4 8 Requirements 4 9 Test method 6 10 Inspection rules 7 11 Cleaning and Handling 9 12 Marking, packaging, transport and storage 9 Appendix A (Normative Appendix) Test Equipment 11

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is a revision of CJ/T 25-1999 for Manual Flow Regulating Valves for Heating, compared with CJ/T 25-1999, within the main technology. The volume changes are as follows. --- Increased the terms and definitions of "valve authority" and "specific flow"; ---The addition of the regulating valve according to the structure type, that is, the straight-through straight-through and the diagonal straight-through; the flange connection and the internal thread are connected. Merging end connection patterns; --- Increased valve body length increase series (Series 2), the maximum nominal diameter increased to DN600; --- Modified the engineering path range and pressure level system (PN). This standard was proposed by the Institute of Standardization of the Ministry of Housing and Urban-Rural Development. This standard is under the jurisdiction of the Heating Standardization Technical Committee of the Ministry of Housing and Urban-Rural Development. This standard was drafted. Beijing Beihua Heating Co., Ltd., Beijing Gas Thermal Engineering Design Institute Co., Ltd., Hebei Balance Valve System Manufacturing Co., Ltd., Hebei Tongli Automatic Control Valve Manufacturing Co., Ltd., Beijing Far East Instrument Co., Ltd., Wen'an County Jielan Special HVAC Equipment Co., Ltd. The main drafters of this standard. Wang Jianguo, Wang Wei, Guo Xu, Cui Xiaoqian, Lu Chao, Wang Li, Song Yumei, Ma Li, Shi Dongchun, Wang Wei. The previous versions of the standards replaced by this standard are. ---CJ/T 25-1999. Manual flow regulating valve for heating

1 Scope

This standard specifies the classification and marking, working conditions and working pressure difference, valves for manual flow regulating valves for hot water supply systems and air conditioning water systems. Body structure and dimensions, materials, requirements, test methods, inspection rules, cleaning and handling, marking, packaging, transportation and storage. This standard applies to design pressure less than or equal to 2.5MPa, design hot water medium temperature is less than or equal to.200 ° C, nominal diameter 15mm~600mm heating flow control valve (hereinafter referred to as "regulating valve").

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 1176 cast copper and alloy GB/T 1220 stainless steel rod GB/T 1348 ductile iron castings GB/T 1414 ordinary threaded pipe series GB/T 5796.1 Trapezoidal thread Part 1. Teeth GB/T 5796.2 Trapezoidal thread part 2. Diameter and pitch series GB/T 5796.3 Trapezoidal thread - Part 3. Basic dimensions GB/T 5796.4 Trapezoidal threads - Part 4. Tolerance GB/T 9113 integral steel pipe flange GB/T 9439 gray iron casting GB/T 12229 general valve carbon steel casting technical conditions GB/T 13927 industrial valve pressure test GB/T 17241.6 integral cast iron flange JC/T 1019 asbestos sealing packing

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Maximum stroke maximumstroke Adjust the amount of displacement of the valve flap from the closed position to the fully open position. 3.2 Opening degree Relative travel Adjust the ratio of the actual stroke to the maximum stroke of the valve stem. 3.3 Circulation capacity flowcapacity The regulating valve is fully open, the pressure difference between the two ends of the valve is 100 kPa, and the flow rate of the regulating valve flows when the fluid density is 1000 kg/m3.

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