91精品免费观看_五月天我淫我色_在线观看国产视频一区_国产91久久久久蜜臀青青天草二_天天干天天夜_亚洲人免费视频
中文
|
English
HOME
ABOUT US
Return
Company Profile
Corporate Culture
History Vision
Oration
Manufacturing
Quality Assurance
HONOR
Return
TS & High-tech Enterprise Certificate
Product Certification
System Authentication
Patent Certificate
Test Report
National Standard
Other
PRODUCTS
Return
Melamine is special
Wear-resisting valve series
High temperature valve series
Cryogenic valve series
Butterfly Valve
Ball Valve
Gate Valves
Globe Valve
Check valve
Multi-function hydraulic control valve
Pipe fittings and special valves
NEWS
Return
Company News
Industry Dynamics
Technology Frontier
Media Focus
APPLICATION
Return
Petroleum and Natural Gas
Chemical industry
Metallurgical Industry
Electric power industry
Municipal Water Conservancy
Overseas projects
SERVICE
Return
Service Concept
After the terms of service
Technical Support
Download
FAQ
RECRUITMENT
Return
Talent Strategy
Careers
CONTACT US
Return
Contact Us
Agent
HOME
ABOUT US
Return
Company Profile
Corporate Culture
History Vision
Oration
Manufacturing
Quality Assurance
HONOR
Return
TS & High-tech Enterprise Certificate
Product Certification
System Authentication
Patent Certificate
Test Report
National Standard
Other
PRODUCTS
Return
Melamine is special
Wear-resisting valve series
High temperature valve series
Cryogenic valve series
Butterfly Valve
Ball Valve
Gate Valves
Globe Valve
Check valve
Multi-function hydraulic control valve
Pipe fittings and special valves
NEWS
Return
Company News
Industry Dynamics
Technology Frontier
Media Focus
APPLICATION
Return
Petroleum and Natural Gas
Chemical industry
Metallurgical Industry
Electric power industry
Municipal Water Conservancy
Overseas projects
SERVICE
Return
Service Concept
After the terms of service
Technical Support
Download
FAQ
RECRUITMENT
Return
Talent Strategy
Careers
CONTACT US
Return
Contact Us
Agent
中文
|
English
SERVICE
Service Concept
After the terms of service
Technical Support
Downloads
FAQ
Your current position:
SERVICE
>
FAQ
14
2016-07
為什么雙座閥小開度工作容易震蕩?
對單芯而言,當介質是流開型時,閥穩定性較好;當介質是流閉型時,閥的穩定性差,雙座閥有兩個閥芯,下閥芯處于流閉,上閥芯處于流開,這樣車小開度工作時,流閉型的閥芯就容易引起閥震動,這就是雙閥座不能用于小開度工作的原因所在。
12
2015-11
為什么切斷閥應盡量選用硬密封?
切斷閥要求泄露越低越好,軟密封的泄露是最低,切斷閥效果當然好,但不耐磨,可靠性差,從泄漏量對密封及可靠性的雙重標準來看,軟密封切斷就不如硬密封切斷好。
09
2015-09
法蘭泄露
1.閥門的法蘭密封連接在接觸部位之間根據設計要求安放密封墊片,依靠連接螺栓所產生的預緊力達到足夠足夠的比壓,阻止介質向外泄露。2.墊片材料和結構有:橡膠墊片、石棉橡膠墊片、石墨墊片、不銹鋼和石墨纏繞式墊片、波紋管形和金屬墊片。3.墊片密封屬于強制密封。
08
2015-01
填料泄露和閥體與閥蓋連接處泄露
1.填料泄露泄露及原因:1)填料密封原理:對填料施加的軸向力,填料產生塑性變形,閥門由于多個填料安裝,部位相互交替接觸,形成“迷宮效應”,起到阻止壓力介質外泄露的作用。
17
2014-10
閥門啟閉有卡阻、不靈活或者不能正常啟閉,甚至無法繼續啟閉
一.閥門啟閉有卡阻、不靈活或者不能正常啟閉,甚至無法繼續啟閉,主要是由于閥桿與其他零件卡阻,主要是閥桿與填料之間的卡阻。一般有: 1.填料壓蓋偏斜后碰閥桿--處理方法:調整壓蓋調節螺栓。 2.填料安裝不正確或壓得過緊--處理方法:填料預緊,適當放松填料。
10
2014-11
閥門密封面擦傷、閥桿光柱部分咬擦傷和閥桿螺紋部分咬傷等
1.密封面研磨后有磨粒嵌入密封面里,末清除干凈,造成密封面擦傷;有的經使用后,磨粒在介質的沖刷下,磨粒排出而粘在密封面上,經閥門開關,造成擦傷。 --處理方法:合理選用研磨劑,密封面研磨后必須清洗干凈。2.介質中的贓物或者焊渣末清除干凈,造成擦傷。
ABOUT US
Company Profile
Corporate Culture
History Vision
Oration
Manufacturing
Quality Assurance
HONOR
TS & High-tech Enterprise Certificate
Product Certification
System Authentication
Patent Certificate書
Test Report
National Standard
Other
PRODUCTS
Melamine is special
Wear-resisting valve series
High temperature valve series
Cryogenic valve series
Butterfly Valve
Ball Valve
Gate Valves
Globe Valve
Check valve
Multi-function hydraulic control valve
Pipe fittings and special valves
APPLICATION
Petroleum and Natural Gas
Chemical industry
Metallurgical Industry
Electric power industry
Municipal Water Conservancy
Overseas projects
Pay attention to us
021-59141010
Add:No. 35 Jiangqiao Road, Jiading Jiangqiao Industrial Park, Shanghai(201803)
Net sales Tel:021-69118082
18701760109
Net sales mailbox:wxw@ht-valve.com
Acting Line:021-69118002
021-69118957
Agent Mailbox:wlx@ht-valve.com
Copyright ? 2019 Shanghai Hua Tong Valve Co., Ltd.
Contact
|
Service
|
Application
|
Links
|
Site Policy
滬ICP備05037222號-1
TOP
HuaTong
18701760109
1302308486@qq.com
主站蜘蛛池模板:
欧美精品一区二区三区在线
|
久精品在线观看
|
中文字幕久热精品视频在线
|
中文字幕亚洲欧美一区
|
亚洲精品午夜久久久久久久久久久
|
久久久久久免费精品一区二区三区
|
91蝌蚪中文
|
国产精品v欧美精品v日韩
|
JAPANXXXⅩ日本人妻HD
|
日韩强奷漂亮少妇高潮麻豆片
|
国产第一页视频在线播放
|
亚洲国产精品成人综合久久久
|
亚洲精品免费在线观看
|
日韩爱爱小视频
|
成人国产精品秘在线观看免费
|
在线观看国产二区
|
亚洲乱轮视频
|
国产大尺度福利视频在线观看
|
成·人免费午夜无码视频在线观看
|
500av导航大全精品
|
国产免费一区二区三区四区五区
|
BT天堂顶级少妇
|
国产精品人妇原创在线播放
|
日本丁香久久综合国产精品
|
大学生一级片
|
国产成人亚洲日本精品
|
国产精品久久久久久久久免费高清
|
亚洲中字幕
|
亚洲国产成人影院在线播放
|
国产精品久久久久一区二区三区
|
国产精品1区2区在线观看
|
免费国产91
|
国产白嫩精品又爽又深呻吟
|
两个少妇给我口爆
|
国内久久久
|
国产精品黄页网在线观看
|
国产午夜无码福利在线看网站
|
国产午夜精品A片一区仙踪林
|
最新中文字幕日本
|
国产精品一品二区三区在线观看
|
97人人做人人人难人人做
|