3.2 Reducing center of gravity, dead-weight and heights of the part and whole valve The main factors affecting the anti seismic performance of the valve are dead-weight and center of gravity of the valve extension mechanism. The main components include the valve body extension, bonnet, bracket and electric actuator. Compared with a split flange structure, the main structural changes are the valve bonnet and bracket for the valve adopting an integral intermediate...
Optimized Intermediate Flange Structure of Nuclear Grade Large Diameter Gate Valves (Part Two) Read
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Abstract: The differences between the integral intermediate flange structure and split flange structure of the large diameter electric gate valve are analyzed, and advantages of the integral intermediate flange structure concerning anti seismic performance of the valve and characteristics of reducing costs and increasing efficiency are explained in this article. 1. Overview Nuclear power valves are important safety equipment in nuclear...
Optimized Intermediate Flange Structure of Nuclear Grade Large Diameter Gate Valves (Part One) Read
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2.4 Results and analysis of the traditional mould test Using the traditional mold structure test, it was found that the mold and the valve sealing gasket part and the cryogenic valve itself leaked. After the test, it was found that the originally tightened long bolts were loose after checking the valve and mould. According to the analysis of the test results, the long bolts become loose due to expansion caused by heat and contraction caused by cold of...
Analysis and Improvement of Structure of the Cryogenic Valve Test Mold (Part Two) Read
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Abstract The causes of leakages at the sealing gasket of the traditional cryogenic valve test mold and the loosening of the flange bolts of the end blind plate are analyzed, and the cryogenic valve test mold with a structure of the butt welding end adopting a combination of the clamp through flange and blind flange is introduced. The structure and clamping method of traditional test molds for cryogenic valves are improved and the problem of deformation...
Analysis and Improvement of Structure of the Cryogenic Valve Test Mold (Part One) Read
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Gate valves usually have structural design such as single discs, double discs, wedges and parallel. Double wedges Z42 and Z62 series and elastic wedge Z40 and Z60 series are the most widely used. The wedge automatically fits the valve seats on both sides when the Z42 and Z62 series valves are closed, automatically compensating the processing position error of the wedge angle, while Z40 and Z60 series rely on...
Abnormal Pressure Increases in Middle Cavities of Gate Valves Read
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Electric butterfly valves are widely used in dusty cold air or hot air gas pipelines of ventilation and environmental protection projects in metallurgy, chemical industry, building materials, power stations and glass. An electric butterfly valve as a device controlling the gas medium plays a vital role in the pipeline. Its good sealing is also very important. How to deal with the poor sealing of electric butterfly valves? There are three following reasons for leakages...
How to Deal With the Poor Seal of Electric Butterfly Valves? Read
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Valve variety is complex. As one of the valves, what advantages and disadvantages of the gate valves? What are the superiorites of gate valves compared with other valves? How to select gate valves? In this article, we will provide you with the advantages and disadvantages of gate valve in comparison with other valves and the commonly used gate valve selection introduction. 1. Basic introduction of gate valves The gate valve is a valve that moves along the straight direction of the center line...
A Comparison of Gate Valves and Other Valves Read
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Here are the briefly introduction of the classifications and working principles of some kinds of gate valves. Overview The valve industry plays a very important role in the development of national economy as an important link in the preparation of manufacturing industry. The domestic demand and export volume of valve products show an upward trend every month and quarter. The overall situation is good, and the competition among domestic valve enterprises is gradually improving. The valves products...
Classifications & Working Principles of Some Kinds of Gate Valves Read
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Don't expect that the gas can be saved if the gas valve is opened half. In fact, it is ok that the gas device is not damaged. Although using gas for cooking is cheaper than using other energy sources, a lot of gas is consumed every month. Recently, a friend said that if you only open half the main gas valve, the gas can be saved. Actually, many friends have followed this practice. In this regard, I am very worried, how can there be such a practice? Therefore, can we save gas by opening...
Can the Gas Be Saved by Half Opening the Valve? Read
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