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D343H多層次(ci)金(jin)屬(shu)(shu)(shu)(shu)硬密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)蝶(die)閥為(wei)偏心金(jin)屬(shu)(shu)(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)結(jie)構,密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)形式(shi)(shi)為(wei)金(jin)屬(shu)(shu)(shu)(shu)對金(jin)屬(shu)(shu)(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng),可調換金(jin)屬(shu)(shu)(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)圈對金(jin)屬(shu)(shu)(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng),不銹鋼(gang)板與石(shi)墨(mo)復合板密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)圈對金(jin)屬(shu)(shu)(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng).硬密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)蝶(die)閥的驅動形式(shi)(shi)除了電動之外還有：手動,蝸輪桿傳動,氣動等(deng)。