氣動硬密封球閥，固定硬密封球閥，

Q647F/H氣(qi)動(dong)固定球閥在(zai)石(shi)油、天然氣(qi)、煤炭(tan)和(he)礦石(shi)的(de)開采、提煉(lian)加工和(he)管道輸送(song)系(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)；在(zai)化工產品(pin)、醫藥(yao)和(he)食品(pin)生(sheng)產種(zhong)(zhong)；在(zai)水(shui)電、火電和(he)核電的(de)電力生(sheng)產系(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)；在(zai)城市和(he)工業企(qi)業的(de)給排水(shui)、供熱、和(he)供氣(qi)系(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)；在(zai)農田的(de)排灌(guan)系(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)；在(zai)治金生(sheng)產系(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)得以(yi)廣泛的(de)應用，是(shi)一種(zhong)(zhong)與生(sheng)產建(jian)設(she)、國防建(jian)設(she)和(he)人民生(sheng)活息(xi)(xi)息(xi)(xi)相關的(de)重(zhong)要(yao)機械產品(pin)。球閥密閉在(zai)各(ge)類管路系(xi)(xi)(xi)(xi)統(tong)(tong)種(zhong)(zhong)用于截(jie)斷或接通介(jie)(jie)質流(liu)，使介(jie)(jie)質按照(zhao)預定的(de)程(cheng)序(xu)輸送(song)到各(ge)個(ge)點。