皇冠体育在线

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低温截止阀出现这些问题时该怎么解决?给您支招!

皇冠体育在线FABURIQI:2019/10/11

皇冠体育在线 DIWENJIEZHIFACHUXIANZHEIXIEWENTISHIGAIZENMEJIEJUE?JININZHIZHAO!

低温截止阀是一种阀瓣沿阀座中心线移动的阀门,是所有阀类中流体阻力很小的一种,即使是缩径球阀,其流体阻力也相当小。阀座(密封圈)一般采用聚四氟乙烯等弹性材料制造,易于保证密封,而且阀门的密封力随着介质压力的增加而增大。阀座通口的变化是与阀瓣行程成正比例关系。截止阀阀启闭时阀杆只作旋转90°运动,因此阀杆的填料密封不易被破坏,而且阀杆倒密封的密封力随着介质压力的增加而增大。截止阀的启闭只做90°转动,故容易实现自动化控制和远距离控制,球阀可配置电动装置、气动装置、液动装置。

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DAOZHIDIWENJIEZHIFAKASIDEYUANYIN:

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2、ZAISHEJISHANG,YOUYUFAGANYUFATAODECAIZHIBUTONG,XIANPENGZHANGXISHUBUTONG。YIBANFAGANYONGBUXIUGANG,XIANPENGZHANGXISHUWEI1.73×10-6℃-1;FATAOWEIHUANGTONG,XIANPENGZHANGXISHUWEI19.9×10-6℃-1,JIHUANGTONGDESHOUSUOBIBUXIUGANGDA,DIWENXIAKENENGJIANGSIKOUYAOZHU。TEBIESHIDANGCAIYONGANGANJIEGOUJIXIYALUOWENSHI,SIKOUDEWENDUBIANHUAFANWEIDA,LUOWENJIANXIXIAO,GENGRONGYICHANSHENGYAOZHUDEXIANXIANG。

3、在运转中,由于截止阀处加温不彻底,或截止阀填料处进水,在低温下造成冻结,或在常温下将低温截止阀皇冠体育在线关闭过紧,使丝扣咬坏等。

JIEJUEBANFA:

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.NEILOU

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.WAILOU

其一是阀门与管路采用法兰连接方式时,由于连接垫料、连接螺栓、以及连接件在低温下材料之间收缩不同步产生松弛而导至泄漏。因此可把阀体与管路的连接方式由法兰连接改为焊接结构,避免了低温截止阀的泄漏。其二是阀杆与填料处的泄漏。