不锈钢截止阀J41W_锅炉排污_截止阀
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- 请求信息 : 2023-03-31 14:26:06 HTTP/1.1 GET : https://www.oulam.cn/product/globe_valve/002-000483.html
- 运行时间 : 0.516143s [ 吞吐率:1.94req/s ] 内存消耗:5,609.20kb 文件加载:241
- 查询信息 : 240 queries
- 缓存信息 : 0 reads,1 writes
- 会话信息 : SESSION_ID=c74d7f1f6151352e6d8e7ddaad527bb9
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锅炉排污是定期排出锅炉内部分被盐质和水渣污染的锅水。广泛应用于传统的冶金、新型煤化工、大型氮肥、专业气体供应等领域。进入汽包的给水总是含有一定量的盐。在锅炉中加药后,锅炉水中的结垢物质转化为水渣。另外,当锅炉水腐蚀金属时,会产生一些腐蚀产物。因此,锅炉水中有各种可溶和不可溶的杂质。在锅炉运行中,这些杂质中只有少数被蒸汽带走,大部分留在锅炉水中。随着锅炉水的不断蒸发,这些杂质的浓度逐渐增加。欧拉姆阀门的不锈钢截止阀具有复合材料超强抗腐,减弱介质冲击。
不锈钢截止阀是一种强制密封阀,所以当阀门关闭时,必须对阀瓣施加压力,以迫使密封面不泄漏。当介质从阀瓣下面进入阀门时,操作力需要克服的阻力是阀杆与填料之间的摩擦力和介质压力产生的推力。关阀的力要大于开阀的力,所以阀杆的直径要大一些,否则阀杆会弯曲。近年来,自密封阀出现以来,不锈钢截止阀的介质流向从阀瓣上方变为阀腔内。此时,在介质压力的作用下,闭阀力较小,但开阀力较大,可相应减小阀杆直径。同时,在介质的作用下,这种阀门也是紧密的。我国的“三合一”阀门曾规定不锈钢截止阀的流向应为自上而下。
不锈钢截止阀,也叫截门,是使用最广泛的一种阀门,它之所以广受欢迎,是由于开闭过程中密封面之间摩擦力小,比较耐用,开启高度不大,制造容易,维修方便,不仅适用于中 低压,而且适用于高压。 不锈钢截止阀的闭合原理是,依靠阀杠压力,使阀瓣密封面与阀座密封面紧密贴合,阻止介质流通。 不锈钢截止阀只许介质单向流动,安装时有方向性。不锈钢截止阀的结构 长度大于闸阀,同时流体阻力大,长期运行时,密封可靠性 不强。
结构比闸阀简单,制造与维修都较方便。密封面不易磨损及擦伤,密封性好,启闭时阀瓣与阀体密封面之间无相对滑动,因而磨损与擦伤均不严重,密封性能好,使用寿命长。
不锈钢截止阀的阀杆轴线与阀座密封面垂直。阀杆开启或关闭行程相对较短,并具有很好的切断动作,使得这种阀门十分适合作为介质的切断或调节及节流使用。
阀瓣对焊硬质合金耐冲刷能力强。压力自密封设计,介质的压力起伏波动对密封性 能无影响。
1、设计制造按BS5352、MSS SP-118;
2、承插口尺寸按ANSI B16.11;JB/T1751
3、螺纹端尺寸按ANSI B1.20.1;JB/T7306
4、对焊端尺寸按ANSI B16.25;JB/T12224
5、法兰端尺寸按 ANSI B16.5;JB79
6、阀门检查和试验API 598; GB/T13927; JB/T9092
结构特征 螺栓连接阀盖(B.B)和明杆支架(OS & Y) 焊接阀盖(W.B)和明杆支架(OS & Y)