J41W/H/F不锈钢暗杆截止阀又叫旋转杆截止阀( 亦叫暗杆楔式截止阀阀)。阀杆螺母设在闸板上,手轮转动带动阀杆转动 , 而使闸板提升,通常在阀杆的底端有梯形螺纹,通过阀门底端的螺纹以及阀瓣上的导槽,将旋转运动变为上下开关。
J41W/H/F不锈钢暗杆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)。
J41W/H/F不锈钢暗杆截止阀只适用于全开和全关,不允许作调节和节流。 不锈钢暗杆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门时,操作力所需克服的阻力,是阀杆和填料的摩擦力与由介质的压力 所产生的推力,关不锈钢暗杆截止阀的力比开不锈钢暗杆截止阀的力大,所以阀杆的直径要大,否则会发生阀杆顶弯的故障。
BG本高暗杆截止阀开启方法:
开启暗杆截止阀时,当闸板提升高度等于阀门通径的1:1倍时,流体的通道完全畅通,但在运行时,此位置是无法监视的。实际使用时,是以阀杆的顶点作为标志,即开不动的位置,作为它的全开位置。为考虑温度变化出现锁死现象, 通常在开到顶点位置上,再倒回 1/2-1圈,作为全开阀门的位置。因此,暗杆截止阀阀门的全开位置,按法板的位置(即行程〉来确定
暗杆截止阀型号:
国标:J41W-16P、J41W-25P、J41W-40P、J41W-64P、J41W-100P、J41W-16R、J41W-25R、J41W-40R、J41W-64R、J41W-100R、J41W-16RL、J41W-25RL、J41W-40RL、J41W-64RL、J41W-100RL、
J41H-16P、J41H-25P、J41H-40P、J41H-64P、J41H-100P、J41H-16R、J41H-25R、J41H-40R、J41H-64R、J41H-100R、J41H-16RL、J41H-25RL、J41H-40RL、J41H-64RL、J41H-100RL、J41F-16P、J41F-25P、J41F-40P、J41F-64P、J41F-100P、J41F-16R、J41F-25R、J41F-40R、J41F-64R、J41F-100R、J41F-16RL、J41F-25RL、J41F-40RL、J41F-64RL、J41F-100RL、
美标:J41H-150LB、J41H-300LB、J41H-600LB、J41W-150LB、J41W-300LB、J41W-600LB、J41F-150LB、J41F-300LB、J41F-600LB、
日标:J41H-10K、J41H-20K、J41W-10K、J41W-20K、J41F-10K、J41F-20K、