VQ647W氣動不銹鋼V型法蘭球閥VQ647F氣動V型球閥VQ647Y氣動不銹鋼V型調(diào)節(jié)球閥VQ647H氣動V形球閥QV647Y防爆氣動V形調(diào)節(jié)球閥QV647F防爆氣動V形球閥QV647H氣動V形調(diào)節(jié)球閥4-20mA調(diào)節(jié)型氣動V形球閥/氣動不銹鋼V型球閥/單作用防爆氣動V型法蘭球閥/故障自動復(fù)位防爆氣動V型法蘭球閥/單作用防爆氣動V型切斷球閥/防爆氣動V形開關(guān)球閥是一種直角回轉(zhuǎn)結(jié)構(gòu)的控制閥。