日本北澤KITZ：氣動(dong)內螺紋球閥(fa)(fa)是由(you)雙（單）作用(yong)(yong)(yong)氣動(dong)活(huo)塞式(shi)執行器和內螺紋球閥(fa)(fa)組成(cheng)。其閥(fa)(fa)體(ti)(ti)可分為整體(ti)(ti)式(shi)、二段式(shi)、三段式(shi)。閥(fa)(fa)座采(cai)用(yong)(yong)(yong)彈性密封(feng)結構(gou)，密封(feng)可靠，啟閉輕松。閥(fa)(fa)桿采(cai)用(yong)(yong)(yong)有倒密封(feng)的(de)下裝式(shi)結構(gou)，閥(fa)(fa)腔異常升壓時(shi)，閥(fa)(fa)桿不會被沖擊。氣動(dong)活(huo)塞式(shi)執行器采(cai)用(yong)(yong)(yong)低(di)摩擦材料做(zuo)成(cheng)軸(zhou)承套，缸體(ti)(ti)內外表(biao)面經硬質陽極氧(yang)化防(fang)腐處(chu)理，提高了氣缸的(de)使用(yong)(yong)(yong)壽命。本產品使用(yong)(yong)(yong)性能(neng)穩定，廣(guang)泛的(de)用(yong)(yong)(yong)于石(shi)化、冶金、電力、輕工、醫藥(yao)等工業(ye)部門(men)