偷拍,日本强奸视频一区二区精品,囯内又大又粗又黄免费视频,国产爆乳无码中出在线视频
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(kāi)度工作容易震蕩?
對(duì)單芯而言,當(dāng)介質(zhì)是流開(kāi)型時(shí),閥穩(wěn)定性較好;當(dāng)介質(zhì)是流閉型時(shí),閥的穩(wěn)定性差,雙座閥有兩個(gè)閥芯,下閥芯處于流閉,上閥芯處于流開(kāi),這樣車(chē)小開(kāi)度工作時(shí),流閉型的閥芯就容易引起閥震動(dòng),這就是雙閥座不能用于小開(kāi)度工作的原因所在。
12
2015-11
為什么切斷閥應(yīng)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(dāng)然好,但不耐磨,可靠性差,從泄漏量對(duì)密封及可靠性的雙重標(biāo)準(zhǔn)來(lái)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(mén)的法蘭密封連接在接觸部位之間根據(jù)設(shè)計(jì)要求安放密封墊片,依靠連接螺栓所產(chǎn)生的預(yù)緊力達(dá)到足夠足夠的比壓,阻止介質(zhì)向外泄露。2.墊片材料和結(jié)構(gòu)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(qiáng)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(duì)填料施加的軸向力,填料產(chǎn)生塑性變形,閥門(mén)由于多個(gè)填料安裝,部位相互交替接觸,形成“迷宮效應(yīng)”,起到阻止壓力介質(zhì)外泄露的作用。
17
2014-10
閥門(mén)啟閉有卡阻、不靈活或者不能正常啟閉,甚至無(wú)法繼續(xù)啟閉
一.閥門(mén)啟閉有卡阻、不靈活或者不能正常啟閉,甚至無(wú)法繼續(xù)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(diào)整壓蓋調(diào)節(jié)螺栓。 2.填料安裝不正確或壓得過(guò)緊--處理方法:填料預(yù)緊,適當(dāng)放松填料。
10
2014-11
閥門(mén)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(jīng)使用后,磨粒在介質(zhì)的沖刷下,磨粒排出而粘在密封面上,經(jīng)閥門(mén)開(kāi)關(guān),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(zhì)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(shū)
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(hào)-1
TOP
HuaTong
18701760109
1302308486@qq.com