"Valve Selection Manual" 3rd edition published

The third edition of "Valve Selection Guide" introduces the basic knowledge (such as usage, classification, parameters, model numbering), the basic principles (such as sealing, material, flow, etc.) Valve selection (such as gate valve, butterfly valve, ball valve, globe valve, plug valve, diaphragm valve, nuclear valve), a variety of automatic valve selection (such as safety valves, steam traps, valves, check valves, Hydraulic control valve, oil and gas pipeline key valve), and related technical information (such as the current domestic and international standards, valve gasket and packing parameters, valve material chemical and mechanical properties, valve coating, etc.).

Since its publication in July 2009, the "Valve Selection Manual" version 2 has been well received by readers and has been printed four times in more than 10,000 volumes. However, with the passage of time, the valve basic standards, material standards, product standards and testing and inspection standards are constantly revised, and some product standards and test and inspection standards vary greatly, the valve product quality requirements are also very There are many standards that have been replaced by new standards and are subject to varying degrees of content updates. For example, some American National Standards (ANSI) have transitioned to ASME standards; the American Petroleum Institute Standards (API) standards have been partially separated from International Standards (ISO); in particular, Germany, Britain, France, The country now has adopted a uniform European Standard (EN), with a new look that is free from its old standard system. At the same time, with the continuous deepening of China's economic system reform, many state-owned valve enterprises in the valve industry have been restructured into joint-stock enterprises and private-owned enterprises. The structure of the valve industry has been greatly changed, such as the valve manufacturer in Jiangsu has gradually exceeded the valve manufacturer in Wenzhou, and the product structure has greatly improved. After the National Development and Reform Commission and the Federation of Machinery Industry organizations, the valve industry has research and development, production of nuclear power valves, ultra-supercritical thermal power units key valves, oil and gas pipelines key valves, oil and gas industry pipeline system pipeline valves and make it localization, so the product Variety increased a lot. In the past, valves with high technical content have now been manufactured by many domestic enterprises and can be used for the extraction and transportation of oil and gas from 500 to 10 million t / a refinery, 30 to 660,000 t / a ethylene plant, 520,000 t / a fertilizer, 300 ~ 1000MW thermal power generation, 30,000 m3 / a air separation and other large equipment supporting the production of valves. The more we develop and expand the socialist market economy in our country, the more we need to keep abreast of and grasp the development of valve varieties at home and abroad. In particular, the standards of the major valve manufacturing countries and regions in the world are closely related to the supply and demand of valves.

In view of the above new changes in domestic and foreign situations, taking into account that the second edition of this handbook has been published for more than six years, it needs to be fully revised so as to meet the needs of the vast readership of the valve market and technology. The main new contents added in this manual are: to correct the flow coefficient Kv values ​​of all kinds of valves; to correct the opening and closing torque values ​​of all kinds of valves; to make the key valves for oil and gas pipelines; to adjust the pressure device - to work the pressure regulating valve and to monitor the adjustment Pressure valve, safety shut-off valve selection; valve test and inspection standards ISO 5208: 2008, API598-2009, EN 12266-2:2012, MSS SP-61-2013, API 6A- 2014, API 6D-2014, API 600 -2015, IEC 60534, ANSI / FCI 70-2-2013 on the valve housing test and sealing performance requirements; given the main material at different pressure levels of the shell test pressure and seal test pressure; gives the API 6A 2010-10-6 Validity: -2010, API 6D-2014, API 600-2015, API 623-2015, API 609-2009 finished product inspection specifications for valve products; an increase of ISO 10497: 2010 valve fire test procedures; an increase of ISO 15848-2: 2010 valve escape Diffuse leak detection; increase nuclear power valve and nuclear power system on the valve requirements; increase the performance curve of the control valve and how to choose the control valve. In addition, some of the content has been deleted, such as the old standard has been replaced by the new standard; Although still in use with little change, but consider the limited length of the book, after the deletion, you can still from the manual section 1, 2 Version of the check.

In the course of revising, reference is made to several outstanding domestic and international standards and standards related to the latest version of the book, but the content is still based on the original text of the country's technical standards, so the standard list is not listed. In addition, for some data in doubt, adopt the strict attitude of "rather not abuse". The amendment seeks to make the book a uniform style, but it also does not impose absolute comparisons. The main consideration is to give priority to practicality and to the convenience of the reader. The two main principles are the following: taking the valve as the main section or sub-section. Change the original book to introduce the method of each factory product, so clearer, easier for users to choose.

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