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032020-04On March 4, 2020, the Standing Committee of the Political Bureau of the Central Committee held a meeting and proposed to increase investment in public health services
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272020-03Leakage of valve body and bonnet: Causes: 1. Low casting quality of cast iron, defects of sand eyelet, loose structure and slag inclusion on valve body and bonnet body 2. Freezing cracking within days;
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202020-03According to the National Standard Information Public Service Platform, five national standards were abolished on March 7, 2020
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132020-03High performance rubber liner butterfly valve is a well-structured butterfly valve, which is especially suitable for regulating or switching the flow and pressure of various tap water...
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072020-01Valve is an important component in the pipeline system of petrochemical plant. It is one of the main leakage sources in the plant because of its variety and quantity...
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282019-12Valve (valve) is the control part of the fluid delivery system, with cut-off, regulation, diversion, prevention of countercurrent, pressure stabilization, shunt or overflow pressure relief and other functions.
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212019-12Water treatment industry is a multidisciplinary and knowledge-intensive high-tech industry, which is an important symbol of the development level of national environmental protection industry.
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142019-121. The handwheel and handle of manual valve are designed according to the hand force of ordinary people, considering the strength of sealing surface and necessary closing force...
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072019-12Heat treatment technology is an important means to obtain good properties of various metal materials.In many practical applications, reasonable selection of materials and various forming processes can not meet the mechanical properties...
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302019-11According to incomplete statistics, the number of enterprises lacking smelting workers, molding workers, engineers,quality control and management personnel in China's foundry industry is about 58%, 20%, 50%, 34%...
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