Valves occupy a large proportion of mechanical products, especially in pharmaceutical, power, petrochemical, metallurgical and other fields, valves play a key role.
Valve is the control component in the fluid conveying system, with cut-off, regulation, diversion, prevention of countercurrent, voltage stability, diversion or overflow pressure relief and other functions.
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First, external damage is caused by material defects. The manufacturing process of valves is very complicated. If the valve produces blowhole or slag inclusion during casting, these defects may expand and cause damage, resulting in fluid leakage.
Flange sealing surface type introduced flange sealing surface according to the working condition, medium, pressure, specifications, temperature and other conditions, so the type of choice is not the same.
Recently, the China Machinery Industry Federation and China General Machinery Industry Association, entrusted by the State Energy Administration, hosted the "New Product Appraisal Meeting of Key Valves and Compressor Anti-surge Valves for ...
China's first international standard for LNG marine equipment, ISO 21157:2018, Design and Test Requirements for Low Temperature Ball Valves for Ships and Offshore Technologies, ISO 21159:2018...
Step 1: gate valve leakage, energy consumption accounting "know". The energy consumption accounting done by the device every day is the same as that of yesterday.
On November 29, 2018, the 13th China urban water affairs development international seminar and new technology and equipment expo was held in chongqing yuelai international convention and exhibition center as scheduled.