Power station valve: often used in water, steam pipe, as the opening and closing device. Power station valve installation requirements 1, electric power station valve should be installed vertically, stem upward. 2, power station valve can be installed in any position on pipeline, but you need to choose materials according to the medium and the working temperature. 3, power station Industrial Valves installation time need to pay attention to the flow of medium, must be in accordance with the valves flow arrow shown in the direction of the installation. Under high temperature and high pressure power station valve 1, (body for die forgings, more than DN65 valve body with forging and casting parts. 2, there are three kinds of valve sealing surface: plane sealing, spherical seal and seal cone. 3, the connection forms of body and bonnet: DN10 ~ DN25 to split ring joint; DN32 ~ DN65 for threaded connection; DN80 above is pressure seal structure. 4, the valve stem material for nitriding steel, has the following advantages: long service life, high hardness, corrosion resistance, wear resistance. Five, the seat and clapper sealing surfaces using chromium cobalt tungsten carbide surfacing or ion spray welding, so has high hardness, wear resistance, abrasion resistance, long service life, etc. DN≤ 50 power cut-off valve parts material parts name carbon steel stainless steel alloy steel valve valve seat sealing surface carbon steel stainless steel chrome vanadium molybdenum steel body carbide carbide carbide disc chrome molybdenum steel stainless steel chrome vanadium molybdenum steel stem nitriding steel nitriding steel nitriding steel cover carbon steel chrome vanadium molybdenum steel DN≥ 65 power cut-off valve parts material parts name carbon steel stainless steel alloy steel valve valve seat sealing surface carbon steel stainless steel chrome vanadium molybdenum steel body carbide carbide carbide disc chrome molybdenum steel stainless steel chrome vanadium molybdenum steel stem nitriding steel nitriding steel nitriding steel seal flexible graphite + stainless steel flexible graphite + + stainless steel valve cap carbon steel stainless steel stainless steel flexible graphite molybdenum chrome vanadium steel packing flexible graphite flexible graphite bracket of flexible graphite carbon steel stainless steel chrome vanadium molybdenum steel
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