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Focus on the design concept and technology of the ball valve
| On the classification knowledge of valves |
| 发布日期：2020-05-18 15:54:00 点击数：538 次 |
| This classification method is divided according to principle, function and structure, and it is currently the most commonly used classification method at home and abroad. General gate valve, globe valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, pressure relief valve safety valve, steam trap, regulating valve, bottom valve, filter, Sewage valve, etc. Classify by use and function Regulatory valves——mainly used to regulate the flow and pressure of medium. Including regulating valve, throttle valve, pressure reducing valve, etc. Check valves-used to prevent backflow of media. Including check valves of various structures. Diverter valve——used to separate, distribute or mix media. Including distribution valves and traps of various structures. Safety valve category-used for safety protection when the medium is overpressured. Including various types of safety valves. Cut off valve-mainly used to cut off or connect the medium flow. Including gate valve, globe valve, diaphragm valve, ball valve, plug valve, disc valve, plunger valve, ball plug valve, needle instrument valve, etc. Classification by pressure Vacuum valve——valve whose working pressure is lower than standard atmospheric pressure. Low pressure valve-a valve with a nominal pressure PN less than 1.6MPa. Medium-pressure valve-a valve with a nominal pressure of PN 2.5-6.4MPa. High-pressure valve-a valve with a nominal pressure of PN10.0-80.0MPa. Ultra-high pressure valve-a valve with a nominal pressure PN greater than 100MPa. Classification by medium temperature High temperature valve——valve with t greater than 450 ℃. . Intermediate temperature valve—a valve with a temperature of 120 ° C less than t and a temperature less than 450 ° C. Normal temperature valve——valve with temperature less than 40 ℃ and less than 120 ℃. Cryogenic valve——A valve with a temperature of 100 ℃ less than t and a temperature less than -40 ℃. Ultra-low temperature valve——valve with t less than -100 ℃. Classification by valve body material Metal body lined valve—: lead-lined valve, plastic-lined valve, enamel-lined valve. Non-metallic valve-such as: ceramic valve, glass steel valve, plastic valve Metal material valve-such as: copper alloy valve, aluminum alloy valve, lead alloy valve, titanium alloy valve, Monel alloy valve, cast iron valve, carbon steel valve, cast steel valve, low alloy steel valve, high alloy steel valve. |
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