Q45F三通(tong)(tong)球(qiu)閥對(dui)介質(zhi)流向的(de)不同切換要(yao)求可(ke)分(fen)為Q44為L型(xing)與(yu)Q45為T型(xing)，L型(xing)可(ke)實現(xian)對(dui)介質(zhi)流向進行切換，亦(yi)可(ke)使相互(hu)垂(chui)直的(de)兩個通(tong)(tong)道連(lian)(lian)通(tong)(tong)或(huo)關閉(bi)。T型(xing)可(ke)實現(xian)對(dui)介質(zhi)的(de)分(fen)流或(huo)混流，不僅可(ke)以實現(xian)介質(zhi)流向的(de)切換，也可(ke)使三個通(tong)(tong)道互(hu)相連(lian)(lian)通(tong)(tong)，還可(ke)以關閉(bi)任一(yi)通(tong)(tong)道，連(lian)(lian)通(tong)(tong)另(ling)外兩個通(tong)(tong)道。本(ben)閥門具(ju)有結構緊湊，造形美觀，密(mi)封性能好(hao)等(deng)特點。