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liangdunfei168 | 当前状态：离线
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供配电系统
liangdunfei168 发表于 2009/2/15 0:20:21 1084 查看 1 回复 [上一主题] [下一主题]
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Doncloud 发表于 2009/2/15 0:20:21
2楼 回复本楼A Butterfly Valve （蝶阀）is from a family of valves called quarter turn valves. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is open, the disc is rotated a quarter turn so that it allows unrestricted passage. The position of the disc is effected from outside the valve.
Globe Valve, Solenoid Valve, Ball Valve, Check Valve, Plug Valve
Tantex Corporation, 欢迎选购。
引用 Doncloud 2009/2/15 0:20:21 发表于2楼的内容
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