氣動截止閥波紋管截止閥J641截止閥又稱截門閥,屬于強制密封式閥門,所以在閥門關閉時,必須向閥瓣施加壓力,以強制密封面不泄漏。當介質由閥瓣下方進入閥門時,操作力所需要克服的阻力,是閥桿和填料的摩擦力與由介質的壓力所產生的推力,關閥門的力比開閥門的力大,所以閥桿的直徑要大,否則會發生閥桿頂彎的故障。按連接方式分為三種:法蘭連接、絲扣連接、焊接連接。從自密封的閥門出現后,截止閥的介質流向就改由閥瓣上方進入閥腔,這時在介質壓力作用下,關閥門的力小,而開閥門的力大,閥桿的直徑可以相應地減少。同時,在介質作用下,這種形式的閥門也較嚴密。我國閥門“三化給”曾規定,截止閥的流向,一律采用自上而下。截止閥開啟時,閥瓣的開啟高度,為公稱直徑的25%~30%時.流量已達到最大,表示閥門已達全開位置。所以截止閥的全開位置,應由閥瓣的行程來決定。低溫長桿截止閥、低溫長桿截止閥J65YJ565YJ965Y直流式對焊電站截止閥、J44H/YJ344Y/R高壓角式截(止回、節流)閥、J41H/YJ61H/Y鍛鋼自緊密封截止閥、J61H/YJ11H/Y鍛鋼自緊密封截止閥、J61H/YJ41H/Y鍛鋼截止閥、BJ45H/W鑄鋼夾套保溫截止閥、J48F/NJ49F/NJ68FNJ69F/N鑄(鍛)鋼柱塞(截止)閥、UJ41H(F/N)鑄(鍛)鋼柱塞(截止)閥、J41W不銹鋼國標法蘭截止閥、DJ61Y鍛鋼低溫截止閥、WJ41H/W鑄鋼波紋管截止閥、BJ41W不銹鋼保溫截止閥、BJ45H/W角式保溫截止閥、J41H-16CJ41Y-25C國標鑄鋼法蘭截止閥、J61H、J61Y鑄鋼自緊密封電站截止閥、J41H/Y鑄鋼直通式截止閥、J11T-16鑄鐵絲口截止閥、J44W/Y不銹鋼角式截止閥、J961H/Y-P54100V/P54140VJ561H/Y電站截止閥、J47YL47Y角式平衡截止閥(節流閥)、J41T/W/X-10/16Q鑄鐵法蘭截止閥、J541H/YJ941H/Y鑄鋼直通式截止(節流)閥、WJ41H美標波紋管截止閥、國標波紋管截止閥、WJ45H德標直流式波紋管截止閥、WJ41H德標波紋管截止閥、GFYP4Y型料漿閥、YJ43H/Y鍛鋼Y型截止閥、WJ/Z41H/Y鍛鋼波紋管閥、J41W-600Lb美標截止閥、J945Y鋼制截止閥、JLH41H/Y防火型截止閥、WJ41W國標波紋管截止閥、J44H/Y角式截止閥/節流閥、JL47H/Y平衡角式截止/節流閥、J/L11W手動截止閥、DS/J61H水封截止閥、NKJ41H真空隔離截止閥、TJ40H-16C手動調節閥、J11H-16C蘇式精鑄截止閥、J41W國標截止閥、BJ45型保溫截止閥、J41H-64C鍛鋼截止閥、J11H-64鍛鋼截止閥、J61Y焊接式截止閥、J61Y壓力自緊式截止閥、J41N-25/40液化氣截止閥、Jy41W/Y氧氣專用截止閥、J41B-16/25/40氨用截止閥、WJ41H波紋管法蘭截止閥、BJ41W保溫截止閥、J41H-300Lb美標截止閥、J11Y鍛鋼截止閥、J41F46-16C聚全氟襯里截止閥、DJ41Y-25P低溫截止閥。.良諾閥門___氣動截止閥波紋管截止閥J641