闸阀优点: 1、流动阻力小。阀体内部介质通道是直通的,介质成直线流动,流动阻力小。 2、启闭时较省力。是与截止阀相比而言,因为无论是开或闭,闸板运动方向均与介质流动方...
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闸阀关闭时,密封面可以只依靠介质压力来密封,即只依靠介质 压力将闸板的密封面压向另一侧的阀座来保证密封面的密封,这就是自密封。大部分闸阀是采用强制密封的,即阀门关闭时,要依靠外力强行将闸板压向阀座, 以保证密封面的密封性。 运动方式:闸阀的闸板随阀杆一起作直线运动的,亦叫明杆闸阀。通常在升降杆上...
闸阀(gate valve)是一个启闭件闸板,闸板的运动方向与流体方向相垂直,闸阀只能作全开和全关,不适门参数而异 , 通常为 5°, 介质温度不高时为 2°52‘。改善其工艺性 , 弥补密封面角度在加工过程中产生的偏差 , 这种闸板叫做弹性闸板。 中文名:闸阀 外文名:Gate valve 运动方式:闸板随阀杆一起作直线运动的 材料分类: 金属材料、阀体衬里、非金属材料 重 ...
(1) Threaded valve: with internal or external thread, and the thread connecting pipes .. (2) Flanged valves: a valve body with a flange connected to the pipe flange. (3) welding connection valve: Body with welding groove connected to pipe welding. (4) clamp connection valve: Body with jaws, pipe clamp connection. (5) connected to the valve sleeve: the pipes are connected to the ferrule. (6) of the clip connection valve: bolts directly to the valve and two pipes connected together in the...
(1) small size valves: nominal diameter DN≤40mm valve. (2) in size valves: nominal diameter DN is 50 ~ 300mm valve. (3) large diameter valve: Nominal valve DN is 350 ~ 1200mm valve. (4) King size valves: nominal diameter of the valve DN≥1400mm
Classification by driving into automatic valves, power-driven valves and manual valves Compressed air valve. Hydraulic valve: With oil liquid pressure driven valve. In addition there are more than a combination of several driving modes, such as gas - electric valve.
(1) vacuum valve: the working pressure below standard atmospheric pressure valve. (2) Low pressure valve: nominal pressure PN ≤1.6Mpa valve. (3) pressure valve: PN nominal pressure is 2.5Mpa, 4.0Mpa, 6.4Mpa valve. (4) high-pressure valve: nominal pressure PN is 10.0Mpa ~ 80.0Mpa valve. (5) high pressure valve: nominal pressure PN≥100.0Mpa valve.
Valve (famen) is a fluid delivery system control unit, with the cut-off, regulation, diversion, to prevent reflux, regulation, diversion or overflow relief functions. Valves for fluid control systems, from simple shut-off valve to a variety of highly complex automatic control valves used in the system, which is quite wide varieties and specifications. The valve can be used to control the flow of air, water, steam, corrosive media, mud, oil, liquid metals and radioactive fluids and other types...