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Analysis on machining technology of oblique channel of valve body of forged st……

What is a forged steel globe valve? Forged steel globe valve is mainly used for pipelines or devices with high temperature and high pressure media. It is used to connect or cut off the media in the pipeline. It is generally not used to adjust the flow. Forged steel globe valve body mostly adopts integral free forging or die forging (the channel is solid). The inlet and outlet channels of the valve body form a certain angle with the centerline of the valve body( α Angle), and the two channels are parallel to each other, and the channels at both […]

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What is the valve casting process

What is the valve casting process? Casting valve is the valve made of cast iron, the general casting of the valve pressure level are relatively low (such as PN16, PN25, PN40, but there are also high pressure, can be up to 1500Lb,, 2500Lb), most of the caliber DN50 or more. Valve casting is an important part of the valve manufacturing process, with a good casting determines a significant proportion of the success of a good valve. Valve manufacturing materials Due to the wide variety of valve specifications, such as general-purpose valves, gate valves, globe valves, check valves, ball valves, butterfly […]

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Analysis and solution of valve failure mode

In view of the safety accidents and adverse effects caused by valve failure, different failure modes and failure causes of valves are briefly described on the basis of valve failure types and failure analysis. Finally, the research and development trend of valve reliability are prospected. General The valve is the control component in the fluid conveying system, which has the functions of cutting off and dredging fluid, adjusting flow, dredging, check, stabilizing pressure, dispersing fluid, overflow and pressure relief, etc. There are many kinds and specifications of valves, including globe valves and ball valves with simple structure, as well as […]

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Design and development of marine tongue valve

The technical parameters and working principle of a marine tongue valve are introduced, and the selection of valve parts materials, structural design, key manufacturing technologies and tests are described. Overview The tongue valve is a key locking device of the control system on board, and if it leaks or fails to open and close, it will lead to fluid leakage from the system and cause serious accidents. The tongue valve is subject to the double corrosive effect of high-temperature flue gas and seawater when working, and the working conditions are complex and harsh. Compared with other structures of marine valves, […]

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General provisions for valve setting

This regulation is applicable to the setting of gate valve, globe valve, ball valve, butterfly valve and pressure reducing valve in petrochemical plant. See relevant regulations for the setting of check valve, safety valve, regulating valve and drain valve. This regulation is not applicable to the setting of valves on underground water supply and drainage pipelines. Valve layout principle Valves shall be set according to the type and quantity shown on the piping and instrument flow diagram (PID). When PID has specific requirements for the installation position of some valves, it shall be set according to the process requirements. The […]

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Design and research of valves for low temperature fields

The rapid development of science and technology in contemporary times, cryogenic technology is widely used in the field of cold storage and preservation, cryogenic transportation, liquefied natural gas LNG, manned spaceflight and superconductivity. In the wave of the rapid changes in cryogenic technology, how to improve the quality of cryogenic valves is particularly important. This paper analyzes and studies from valve standards, manufacturing processes, structural design and materials to provide reference for cryogenic valve selection, design and manufacturing. Domestic and international standards for cryogenic valves Domestic and international standards for cryogenic valves are: “Cryogenic Valve Technical Conditions” (GB/T 24925-2019), “LNG […]

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How to Select the Right Valve

Most of the media in chemical production units have the characteristics of high toxicity, flammability, explosion and strong corrosivity. The working conditions are complex and harsh, and the operating temperature and pressure are high. Once the valve fails, the medium leakage will be caused in light cases, the shutdown of the unit will be caused in serious cases, and even malignant accidents will be caused. How to select the right valve Scientific and reasonable selection of the right valve can not only reduce the construction cost of the device, but also ensure the safe operation of production. Key points of […]

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FLOWEXPO CHINA 2018: The Seventh FlowTech International Pumps & Valves &#……

Flowtech China is an international trade fair for pumps, valves and piping. This exhibition is communication and information platform in the industry and offers the exhibiting companies the opportunity to present to an audience of experts here. Visitors can find out here in depth and comprehensive information on the latest developments, trends, services and products in various fields. The Flowtech will take place on 3 days from Thursday, 31. May to Saturday, 02. June 2018 in Shanghai. Cycle: annually Audience: professional visitors only Date: 31.05.2018 – 02.06.2018*  Thursday – Saturday, 3 days Past editions: 07. – 09. June 2017  15. […]

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Valve World Asia 2017

The Valve World Expo & Conference Asia 2017 will be held on September 20 and 21 in the Suzhou International Expo Center in Suzhou, China. Following the huge success of the past 6 Valve World Asia show over the past 12 years, the Valve World Expo & Conference Asia 2017 promises to be a valuable meeting point for valve professionals from all over the world with a special emphasis on recent developments in China. Piping and valve professionals from the West & East can update their knowledge of valve applications in a variety of industries with a clear focus on […]

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