截止阀简介:截止阀的启闭件是塞形的阀瓣,密封面呈平面或锥面,阀瓣沿流体的中心线作直线运动。阀杆的运动形式,有升降杆式(阀杆升降,手轮不升降),也有升降旋转杆式(手轮与阀杆一起旋转升降,螺母设在阀体上)。截止阀只适用于全开和全关,不允许作调节和节流。 截止阀属于强制密封式阀门,所以在阀门关闭时,必须向阀瓣施加压力,以强制密封面不泄漏。当介质由阀瓣下方进入阀六时,操作力所需要克服的阻力,是阀杆和填料的磨擦力与由介质的压力所产生的推力,关阀门的力比开阀门的力大,所以阀杆的直径要大,否则会发生阀杆顶弯的故障。近年来,从自密封的阀门出现后,截止阀的介质流向就改由阀瓣上方进入阀腔,这时在介质压力作用下,关阀门的力小,而开阀门的力大,阀杆的直径可以相应地减少。同时,在介质作用下,这种形式的阀门也较严密。我国阀门“三化给”曾规定,截止阀的流向,一律采用自上而下。截止阀—上海森工阀门截止阀、节流阀系列产品:电动截止阀J941H/J961Y。气动截止阀J641H。气动角座阀。日标截止阀J41W。德标截止阀。美标截止阀J41W。保温截止阀BJ41H/BJ45。高温截止阀J41Y/J61Y。高压截止阀J41H、对焊截止阀J61Y/J65Y/J64H。高温高压截止阀。Y形截止阀J45/J65Y。自密封截止阀J41W/J61W。黄铜截止阀J11W。铸铁截止阀J41TW。铸钢截止阀J41H。锻钢截止阀。不锈钢截止阀J41W。铬钼钢截止阀J41Y-100I。波纹管截止阀WJ41/WJ44/WJ61H、保温波纹管截止阀BWJ41W。丝口截止阀J11W。法兰截止阀J41。氧气截止阀JY41W。真空截止阀NKJ41H/44H/J61。水封截止阀DS41H/DS61H。伞齿轮截止阀J541H。氨用截止阀J41B/J42B/J61B/J21B/J11B。角式截止阀J44H。衬氟截止阀J41F4/J45F4。衬胶截上阀J41J/J45J。塑料截止阀J41F-6S、J11F-6S。液化气截止阀J41F。天燃气截止阀J41N。低温截止阀DJ41W。撞击式大口径截止阀。蒸汽截止阀。斯派沙克式截止阀。节流阀、高压节流阀、截止节流平衡阀欢迎选购定做;销售热线:021-51021261 图文传真:021-51021262
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