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[截止阀]Stop Valve/Globe Valve
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。
北泽阀门——截止阀、节流阀系列产品;截止阀、法兰截止阀、对焊截止阀、承插焊截止阀、放空导淋阀。手动截止阀、电动截止阀J941、J961、气动截止阀J641、气动角座阀、正齿轮传动截止阀J441、伞齿传动轮截止阀J541。保温截止阀BJ41、BJ45。高温高压电站阀(J61Y-P54/170V)、高温截止阀J41Y/J61Y。高压截止阀J41H、J61H、对焊高温高压截止阀J61、J65、J64、Y形截止阀J45/J65Y、自密封高压截止阀J41、J61。波纹管截止阀WJ41、WJ44、WJ61、WJ11、保温波纹管截止阀BWJ41。氧气截止阀JY41W。真空截止阀NKJ41H、NKJ44H、NKJ61、水封截止阀DSJ41H、DSJ61H。氨用截止阀J41B、J42B、J61B、J21B、J11B。角式截止阀J44、J64。衬氟截止阀J41F4、J45F4、衬胶截止阀J41J、J45J、塑料截止阀J41F-6S、J11F-6S。液化气截止阀、天燃气截止阀J41N。低温截止阀DJ41W。撞击式截止阀ZJ41H。蒸汽截止阀J41H、WJ41H。黄铜截止阀J11W-16T、铸铁截止阀J41T-16Z、铸钢截止阀J41H-16C、不锈钢截止阀J41W-16P、锻钢截止阀、铬钼钢截止阀J61Y-16I、铬钼钒钢截止阀J61Y-100V。节流阀L41H、高压节流阀L41Y-320、截止节流平衡阀L41Y/L44Y/L46Y/L86Y/L87Y/L66Y/L67Y/L47Y。节流截止放空阀FJ41Y。节流截止排污阀TPJ41Y。
进口截止阀 截止阀结构图 截止阀标准 截止阀详细资料 截止阀型号 截止阀作/应用 截止阀尺寸 截止阀价格表 截止阀工作原理 截止阀安装示意图 截止阀规格 截止阀内部结构图
阀体材质:铸铁、铸钢、不锈钢、锻钢、铬钼钢、铬钼钒钢、黄铜,密封面材质:H、N、F46、J、Y、W、T、G。工作压力1.6-32MPA,工作温度-40°C- 550°C。阀门口径 DN15-DN600。连接方式:法兰、焊接、内螺纹、外螺纹、卡套。传动方式:手动、正齿轮、伞齿轮、气动、电动。适用介质:水、油品、气体、蒸汽、酸类。 制造标准:国标、美标、日标、德标。 
截止阀的阀杆的运动形式,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内时,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。截止阀开启时,阀瓣的开启高度,为公称直径的25%~30%时,流量已达到最大,表示阀门已达全开位置。所以截止阀的全开位置,应由阀瓣的行程来决定。
截止阀具有以下优点:1.结构简单,制造和维修比较方便。2.工作行程小,启闭时间短。3. 密封性好,密封面间磨擦力小,寿命较长。
截止阀的缺点如下:1. 流体阻力大,开启和关闭时所需力较大。2. 不适用于带颗粒、粘度较大、易结焦的介质。3. 调节性能较差。
截止阀的结构形式:1.截止阀的种类按阀杆螺纹的位置分有外螺纹式、内螺纹式。按介质的流向分,有直通式、直流式和角式。截止阀按密封形式分,有填料密封截止阀和波纹管密封截止阀。2.  截止阀阀体的结构形式有直通式、直流式和直角式。直通式是最常见的结构,但其流体的阻力最大。直流式流体阻力较小,多用于含固体颗粒或粘度大的流体。直角式阀体多采用锻造,适用于较小通经、较高压力的的截止阀。
截止阀的安装与维护应注意以下事项:1、手轮、手柄操作的截止阀可安装在管道的任何位置上。2、手轮、手柄及伟动机构,不允许作起吊用。3、介质的流向应与阀体所示箭头方向一致。
北泽截止阀已广泛应用于各种锅炉蒸汽系统、矿产、石油、化工、液化气、给排水、食品、制药、发电、城建、市政、等领域,以及居民日常生活中。北泽产品畅销全国各地,优质的质量,高效的服务,深得用户的信赖和广泛的赞誉。
 

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