欧美大胆无码视频,欧美日韩一本无码免费专区,欧美日韩在线无码一区

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玻璃鋼三通

玻璃鋼三通球閥

玻璃鋼三通球閥的結構特點 玻璃鋼三通球閥的球體是固定的,受壓后不產生移動。固定球球閥都帶有浮動閥座,受介質壓力后,閥座產生移動,使密封圈緊壓在球體上,以保證密封。通常

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  玻璃鋼三通球閥的結構特點
  玻璃鋼三通球閥的球體是固定的,受壓后不產生移動。固定球球閥都帶有浮動閥座,受介質壓力后,閥座產生移動,使密封圈緊壓在球體上,以保證密封。通常在與球體的上、下軸上裝有軸承,操作扭距小,適用于高壓和大口徑的閥門。
  為了減少玻璃鋼球閥的操作扭矩和增加密封的可靠程度,又出現了油封球閥,既在密封面間壓注特制的潤滑油,以形成一層油膜,即增強了密封性,又減少了操作扭矩,更適用高壓大口徑的球閥。
  

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欧美大胆无码视频,欧美日韩一本无码免费专区,欧美日韩在线无码一区
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