China Jingjia Valve (Group)  Co., Ltd.
Hotline:+86-577-67987115  Email:sales@cn-jingjia.com     
Home About Product News Network Honor Job Contact 中文  
News center
A global sales network
Testing equipment
Product selection to download
Contact
 Sales Hotline
+86-577-67987115
Fax:+86-577-67987118
Tel:Dong’ou Industrial Zone, Wenzhou, Zhejiang, China
URL:http://m.fmub.cn
Email:sales@cn-jingjia.com
News center You are here:Home - News center -Regulating valve in the high, low temperature valve can not work normally 5 solutions  

Regulating valve in the high, low temperature valve can not work normally 5 solutions

Datr:2013/5/16

Regulating valve in the high, low temperature valve does not work the normal solution (5 methods)

1) uniform line swelling decreased two-seat valve leakage method

Two-seat valve in the normal temperature test, the leakage is not too large. However, an input high temperature leakage volume soared. This is because the seat is fixed on the valve seat sealing surface of linear expansion linear and valve sealing surface is not a double expansion caused by a DN50. If the valve seat, valve core is made of stainless steel, valve for carbon steel, used in F at room temperature 70 degrees in the sealing surface of the valve seat and valve, expansion of 0.06mm sealing surface line, an increase of leakage is more than 10 times. The solution:

The selection of the valve body and the valve core are made of the same material, the stainless steel valve. But stainless steel valve than carbon steel valve high price by more than 3 times. From the perspective of economy should be considered;

The selection of the sleeve valve replaced, due to the sealing surface of the sleeve, the sleeve and the valve plug is the same material.

2) the valve seat sealing welding method

When the temperature up to 750 ° F, the seat of threaded connection caused by leakage in the surface and the thread seal is connected with the valve, which can be threaded erosion, dangerous seat falling, encounter this kind of failure, should think of seal welding of the valve seat, to prevent loosening and shedding.

3) lining welding method

As on the spool, the valve plug, valve stem guide bushing, the vast majority of occasions are statically matched. Regulating valve in the indoor combination, work in high and low temperature, not a cause with diameter minor variations of the linear expansion, bushing with occasionally encountered interference is minimal, or bushing and valve due to a foreign body stuck in the spool movement under the pull, Bush will fall off. This fault is not much, but have occurred. In this regard, the bushing welding, to ensure that Bush never falling.

4) increase the guide bushing gap method

At high temperature, when the diameter of bushing with a diameter expansion is not a line, and the shaft is larger than the expansion bushing inner hole, shaft movement or rotation will produce card jumps, such as high temperature butterfly valve. If the actual operating temperature when the valve and the valve operating temperature requirements, may be the factory quality problems. To solve the problem, natural is to increase the gap clearance. A simple solution is to put the guiding position of shaft diameter small car 0.2 ~ 0.5mm, and should try to improve the smoothness.

5) packed back-to-back mounting method

The deep freeze temperature valve, due to pipeline when cooled to form a vacuum, if from the padding to the valve body can be vented, double packing layer or the filling part is installed back to back, to stop the atmosphere through the stem seal leak.

Return】【Shut】         
Related articles
Analysis of control valve in the application of common problems 2013/5/16 
First technology Jingjia valve open 2013/5/16 
The latest development of copper valve technology 2013/5/16 
Intelligent technology to promote the development of instrument and valve industry 2013/5/16 
Analysis of dynamic and static balance valve balancing valve 2013/5/16 
Pneumatic control valve preparation before installation installation 2013/5/16 
Add:Dong’ou Industrial Zone, Wenzhou, Zhejiang, China
Tel:+86-577-67987115  Fax:+86-577-67987118  Email:sales@cn-jingjia.com
Release all :China Jingjia Valve (Group) Co., Ltd. Technical support :Global pump and valve trade [Manager]
WEBSITES: English 中文版 German French Italian Japanese Korean Indonesian Russian
主站蜘蛛池模板: 狂野=aV人人澡人人添|天天干夜夜擦|两个人的www免费高清视频|永久免费看mv网站入口亚洲|久久一区二区三区四区|亚洲男人网 | 狠狠躁天天躁又黄又爽|亚洲精品无码国产一区二区|黄色影视在线观看|国产精品福利网|久在线看|亚洲视频国产 | 把女人弄爽=a片免费视频|999精品免费视频|五月婷在线|高清色惰WWW日本COM|一二三区=av|永久在线观看免费视频 | 超碰人人草人人干|精品国产伦一区二区三区观看方式|无码中文字幕人妻在线一区二区三区|隔壁老王国产在线精品|在线欧美精品一区二区三区|91在线视频九色 | 国产精品婷婷色综合www在线|丰满风流护士长BD=a片|国产精品福利片|农村人伦偷精品视频=a人人澡|久热免费在线视频|18禁美女黄网站色大片免费网站 | 少妇高潮尖叫黑人激情在线|99久久精品国产观看|日韩干干干|精品欧美一区二区三区久久久小说|免费看黄色片|#NAME? | 国产无码一区二区|韩日午夜|国产精品男人天堂|免费在线观看国产黄|欧美精品黑人粗大|欧美一区观看视频 | 亚洲国产精品一区二区制服换脸|中文字幕极品|文中字幕一区二区三区视频播放|亚洲欧洲美洲综合色网|成人爱爱=a=a啪啪看片|五十六十老熟女HD60 | 久久婷婷国产综合尤物精品|日日日噜噜噜|日本韩国欧美一级片|欧美一级二级在线观看|最新无码人妻在线不卡|国产精品入口夜色视频大尺度 | 亚洲国产福利一区|免费无码午夜福利片69|99亚洲伊人久久精品影院红桃|日韩在线观看你懂的|在线观看99|91午夜国产 | 色蜜桃=av|四虎影院在线看|最色网ww|爱色=av|欧美另类日韩|69国产成人精品午夜福中文 | 欧美特一级片|午夜肉伦伦影院无码|色18亚洲美女|亚洲成人黄网|山村少妇肉系列1一7|天堂8在线新版官网 | 成在人线无码=aⅴ免费视频|毛片免费观看天天干天天爽|天天摸天天做天天爽水多|在线观看日本www|奇领6080奇领影院奇领yy6080在线观看|黄色片观看 | 国产小视频在线免费观看|欧美亚洲综合另类|亚洲精品在线第一页|日操视频|亚洲精品久久无码老熟妇|在线观看视频色 | 国产精品麻豆高潮刺激=a片|国产=aⅴ无码专区亚洲=av|草草在线视频|亚洲日韩精品无码专区加勒比|国产精品激情|成全视频观看免费高清第6季 | 夫妻性生活黄色一级片|奇米精品一区二区三区四区|一级毛片啪啪|一区二区三区中文在线|国产精选大秀一区二区|高潮影院 | 婷婷综合久久狠狠色99H|精品国偷自产在线视频99|999久久久无码国产精品|国产精品一区二三区|激情中文小说区图片区|国产亚洲日 | 强奷乱码欧妇女中文字幕熟女|中国女人FREE性HD|国产精品一码二码三码在线|少妇性l交大片免费快色|久热=av在线|黑人巨大人精品欧美三区 | 亚洲第一精品视频在线观看|欧美=a在线观看|免费国产美女爽到喷出水来视频|曰本三级在线|中文无码精品=a∨在线观看|在线观看日本黄色片 | 人人草97|欧美成人免费在线观看视频|国产毛片午夜福利|美国一级黄色毛片|新婚人妻和上司出差被中出|久爱免费视频 | www.视频一区|韩国伦理片在线|无码熟妇人妻=av在线影片免费|亚洲入口|爽到憋不住潮喷大喷水视频|蜜桃视频www 色播六月天|色综合久久久久久久久久|国产精品久久久久不卡绿巨人|国产精品视频一区国模私拍|久久婷综合|精品麻豆剧传媒=av国产 日韩=a网|超碰=av在线|国产综合久|三级视频在线|久久精品毛片免费观看|护士精品一区二区三区99 | 亚洲久久综合|久久伊甸园|青草国产超碰人人添人人碱|91资源在线播放|九九九免费观看视频|又黄又爽的免费视频 | 国产精品原创视频|国产综合视频|1000部夫妻午夜免费|亚洲综合九九|色99日韩|成人久久18秘免费 | 国产V精品无码好舒服欧美精品|一本之道亚洲|亚在线观看免费视频入口|成人学院中文字幕|国产精品成人观看视频网站|欧洲成在人线视频免费 | 男同免费|久久久久久草莓香蕉步兵|亚洲女女女同性VIDEO|免费的=av不用播放器的|黄频网站在线观看|久久久88 | 狠狠色成人一区二区三区|国语对白二区|性猛交xxxx|jαpαnesehd熟女熟妇伦|午夜影院免费版|国产精品自在线拍国产手青青机版 | 亚洲天天干|女人十八一级毛片|www.四虎影院在线观看|911精产国品一二三区在线观看|欧美性猛交|久久久久久久岛国免费网站 | 色综合天天综合高清网国产在线|国产精品九九九九|国产乱妇乱子|国产色情理论在线观看视频|久久影院精品|寂寞骚妇被后入式爆草抓爆 | 最近中文字幕高清免费大全1|久久久久国产亚洲|日本free护士videosxxxx|国产日产高清欧美一区二区三区|免费做爰猛烈吃奶摸视频在线观看|日本无遮挡在线观看 | 日本三级日本三级韩国三级视|国产精品国产自线拍免费|CHIN=a男男互插网站|女邻居丰满的奶水在线观看|免费国产v=a在线观看|国产乱子伦无套一区二区三区 | 国语精品对白露脸少妇网站|快好爽射给我视频|国产熟妇另类久久久久久|在线看免费视频|www久久九|亚洲综合欧美另类 | 牛牛热在线视频|久久精品2024|久久久久久国产一区二区三区|波多野结衣乳巨码无在线观看|亚洲综合色视频在线观看|草的爽=aV导航 | 伊人5566|久久久久久久久久久影视|国产精品正在播放|精品久久黄色|成人免费看黄yyy456|欧美伊香蕉久久综合网99 | 久久精品国产2020|在线国产99|中文字幕视频一区|精品免费久久久|欧美性XXXX丰满极品少妞|欧美精品1区2区 | 午夜影院污|亚洲精品一区二区三区大胸|午夜=a级理论片915影院|国产一区二区三区免费不卡|国产精品久久久久久久久久98|国产一区三区视频 | 人与牲口性恔配视频免费|亚洲成=a人片4444|性XXXX18免费观看视频|狠狠亚洲婷婷综合色香五月排名|四虎影院免费|天天拍拍天天干 | 欧美亚洲成人在线|国产精品拍天天在线|超碰人人91|天下第一社区高清在线播放|欧美黄色成人影院|欧美成人影院在线 | 人人草97|欧美成人免费在线观看视频|国产毛片午夜福利|美国一级黄色毛片|新婚人妻和上司出差被中出|久爱免费视频 | 日本一区二区三区四区视频|亚洲一区黄色|久久综合狠狠综合久久狠狠色综合|法国性xxxxx极品|久久无码=aV中文出轨人妻|无码少妇一区二区三区=av | 国产精品九九九九九九九|我征服了仪态端庄的物理老师|最新中文字幕在线|久久成人啪啪性教育|#NAME?|欧美大香线蕉线伊人久久 | 欧美高清福利|免费亚洲黄色|黄片毛片免费|亚洲欧美日韩在线资源观看|国产精品久久久久久久久久久久午|日本三级播放 |