JPS63214579A - High-temperature, high-pressure difference valve - Google Patents
High-temperature, high-pressure difference valveInfo
- Publication number
- JPS63214579A JPS63214579A JP4530587A JP4530587A JPS63214579A JP S63214579 A JPS63214579 A JP S63214579A JP 4530587 A JP4530587 A JP 4530587A JP 4530587 A JP4530587 A JP 4530587A JP S63214579 A JPS63214579 A JP S63214579A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- ceramic
- valve
- valve seat
- thermal expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 79
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000007769 metal material Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 5
- 230000035939 shock Effects 0.000 abstract description 7
- 229910010293 ceramic material Inorganic materials 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 229910001293 incoloy Inorganic materials 0.000 description 3
- 229910001347 Stellite Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高温・高圧作動流体が流れる流路に設けた高
温・高差圧弁に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high temperature/high differential pressure valve provided in a flow path through which a high temperature/high pressure working fluid flows.
（従来の技術）
従来、高温・高圧作動流体が流れる流路に設けた高温・
高差圧弁２例えばボイラ用主蒸気管に設けたドレン弁の
弁体及び弁座には、高強度金属材料１例えばＪＩＳのＳ
ＵＳ材料にステライトを盛会して構成した高強度金属材
料を使用して、耐久性とシール性とを得るようにしてい
る。(Conventional technology) Conventionally, high-temperature and high-pressure working fluids have been
High-strength metal material 1, such as JIS S
A high-strength metal material made of US material with stellite added thereto is used to provide durability and sealing performance.
（発明が解決しようとする問題点）
前記ボイラ用主蒸気管に設けたドレン弁は、ボイラの電
力事情に応じた一日或いは一週間毎の起動、停止に伴っ
て頻繁に作動されるようになり。(Problems to be Solved by the Invention) The drain valve installed in the main steam pipe for the boiler is frequently operated as the boiler is started and stopped on a daily or weekly basis depending on the power situation of the boiler. Become.
弁体及び弁座が高温、高速の作動流体に曝されて。The valve body and valve seat are exposed to high temperature and high speed working fluid.
早期に浸食或いは腐食していた。この点は、弁体及び弁
座を耐熱高硬度のセラミックス材料により構成すれば、
解消されるが、 （■）セラミックス材料は、金属材料
に比べると、熱膨張率が大幅に低いので、セラミックス
製弁体と同弁体を支持する金属製部材との接合部、及び
セラミックス製弁座と同弁座を支持する金属製部材との
接合部に大きな熱膨張差が生じ、このときの内部応力に
よりセラミックス製弁体及びセラミックス製弁座が破損
する。（■）またセラミックス製弁体は、厚肉であり、
同厚肉セラミックス部品の特性上、中心部の強度は比較
的低いが、開弁と同時にセラミックス製弁体が急速に加
熱されると、比較的強度レベルの低い弁体中心部付近に
熱衝撃により最大引張り応力が働いて、セラミックス製
弁体の中心部が破壊されるという問題があった。It had eroded or corroded early. This point can be solved if the valve body and valve seat are made of heat-resistant and highly hard ceramic material.
(■) Ceramic materials have a significantly lower coefficient of thermal expansion than metal materials, so the joint between the ceramic valve body and the metal member that supports the valve body, and the ceramic valve body A large difference in thermal expansion occurs at the joint between the seat and the metal member supporting the valve seat, and the internal stress at this time causes damage to the ceramic valve body and the ceramic valve seat. (■) Also, the ceramic valve body is thick,
Due to the characteristics of thick-walled ceramic parts, the strength of the center part is relatively low, but if the ceramic valve body is rapidly heated at the same time as the valve is opened, thermal shock will occur near the center of the valve body, which has a relatively low strength level. There was a problem in that the center of the ceramic valve body was destroyed due to the maximum tensile stress.
（問題点を解決するための手段）
本発明は前記の問題点に対処するもので、高温・高圧作
動流体が流れる流路に設けた高温・高差圧弁において、
弁体をセラミックス製中心軸部とセラミックス製外周部
とにより構成し、弁座をセラミックスにより構成し、上
記セラミックス製弁体と同弁体を支持する金属製部材と
の間、及び上記セラミックス製弁座と同弁座を支持する
金属製部材との間に緩衝材として低熱膨張金属材を焼嵌
めにより介装したことを特徴としている。(Means for Solving the Problems) The present invention addresses the above problems, and includes a high temperature/high differential pressure valve provided in a flow path through which a high temperature/high pressure working fluid flows.
The valve body is composed of a ceramic central shaft part and a ceramic outer circumferential part, the valve seat is composed of ceramic, and a space between the ceramic valve body and a metal member supporting the valve body, and a ceramic valve. The valve seat is characterized in that a low thermal expansion metal material is inserted as a cushioning material between the seat and the metal member supporting the valve seat by shrink fitting.
本発明の目的とする処は、セラミックス製弁体と同弁体
を支持する金属製部材との熱膨張差、及びセラミックス
製弁座と同弁座を支持する金属製部材との熱膨張差に基
づ（弓弁体及び同弁座の破ｍを防止できる。また開弁と
同時にセラミックス製弁体が急速に加熱されて、弁体中
心部付近に熱衝撃により最大引張り応力が働いたときの
弁体中心部の破壊を防止できる改良された高温・高差圧
弁を供する点にある。The purpose of the present invention is to address the difference in thermal expansion between a ceramic valve body and a metal member that supports the valve body, and the difference in thermal expansion between a ceramic valve seat and a metal member that supports the valve seat. Based on this, it is possible to prevent the bow valve body and valve seat from breaking.Also, when the ceramic valve body is rapidly heated at the same time as the valve is opened, and the maximum tensile stress is applied near the center of the valve body due to thermal shock, The object of the present invention is to provide an improved high temperature/high differential pressure valve that can prevent damage to the center of the valve body.
（作用）
本発明の高温・高差圧弁は前記のように弁体をセラミッ
クス製中心軸部とセラミックス製外周部とにより構成し
、弁座をセラミックスにより構成し、上記セラミックス
製弁体と同弁体を支持する金属製部材との間、及び上記
セラミックス製弁座と同弁座を支持する金属製部材との
間に緩衝材として低熱膨張金属材を焼嵌めにより介装し
ている。(Function) As described above, the high temperature/high differential pressure valve of the present invention has a valve body composed of a central shaft made of ceramics and an outer peripheral part made of ceramics, a valve seat made of ceramics, and the same valve body as the above-mentioned ceramic valve body. A low thermal expansion metal material is inserted by shrink fitting as a buffer material between the ceramic valve seat and the metal member supporting the valve seat, and between the ceramic valve seat and the metal member supporting the valve seat.
同低熱膨張金属材の線熱膨張係数は、セラミックス製弁
体及び弁座の４．４Ｘ１０−’、金属製部材の１５．６
Ｘ１０−ｈに対して７Ｘ１０−’であり、セラミックス
製弁体と同弁体を支持する金属製部材との熱膨張差、及
びセラミックス製弁座と同弁座を支持する金属製部材と
の熱膨張差が同低熱膨張金属材により吸収されて、上記
熱膨張差に基づく同弁体及び同弁座の破…が防止される
。The linear thermal expansion coefficient of the low thermal expansion metal material is 4.4X10-' for the ceramic valve body and valve seat, and 15.6 for the metal member.
7X10-' with respect to The expansion difference is absorbed by the low thermal expansion metal material, and the valve body and valve seat are prevented from breaking due to the thermal expansion difference.
また弁体が高強度セラミックス製中心軸部とセラミック
ス製外周部とにより構成され、同高強度セラミックス製
中心軸部が同セラミックス製外周部にガラス系等の接着
剤を介して一体的に結合されており、開弁と同時にセラ
ミックス製弁体が急速に加熱されて、弁体中心部付近に
熱衝撃により最大引張り応力が働いても、セラミックス
製弁体の中心部が破壊されない。In addition, the valve body is composed of a central shaft made of high-strength ceramics and an outer peripheral part made of ceramics, and the central shaft part made of high-strength ceramics is integrally bonded to the outer peripheral part made of ceramics via a glass-based adhesive or the like. Therefore, even if the ceramic valve body is rapidly heated when the valve is opened and maximum tensile stress is applied near the center of the valve body due to thermal shock, the center of the ceramic valve body will not be destroyed.
（実施例）
次に本発明の高温・高差圧弁を第１，２図に示す一実施
例により説明すると、第１図の（１）が金属材料例えば
ＪＩＳの５ＵＨ−６００材により構成された金属製ステ
ム（弁体を支持する金属製部材） 、 （２）がストッ
パピン、（３）が低熱膨張金属材（線熱膨張係数がセラ
ミックス材例えば炭化珪素と金属材例えばＪＩＳの５Ｕ
）Ｉ−１３００材との中間的な値をもつ例えばインコロ
イ９０３材）により構成された弁体ホルダー、（４）が
セラミックス材例えば炭化珪素により構成されたセラミ
ックス製弁体、（５）が上記弁体ホルダー（３）と同様
に低熱膨張金属材に構成された弁座ホルダー、（６）が
セラミックス材例えば炭化珪素により構成されたセラミ
ックス製弁座、（７）が金属製弁箱で、セラミックス製
弁体（４）と同弁体（４）を支持する金属製ステム（１
）との間に緩衝材として低熱膨張金属製弁体ホルダー（
３）を焼嵌めにより介装し、セラミックス製弁座（６）
と同弁座（６）を支持する金属製弁箱（７）との間に緩
衝材として低熱膨張金属製弁座ホルダー（５）を焼嵌め
により介装している。また上記セラミックス製弁体（４
）の詳細を示す第２図において、 （４ａ）が高強度セ
ラミックス製中心軸部。(Example) Next, the high temperature/high differential pressure valve of the present invention will be explained with reference to an example shown in Figs. A metal stem (a metal member that supports the valve body), (2) is a stopper pin, and (3) is a low thermal expansion metal material (the linear thermal expansion coefficient is a ceramic material such as silicon carbide and a metal material such as JIS 5U).
) A valve body holder made of a material (for example, Incoloy 903 material) having an intermediate value between that of the I-1300 material, (4) a valve body made of a ceramic material such as silicon carbide, and (5) a valve body made of a ceramic material such as silicon carbide. Like the body holder (3), the valve seat holder is made of a low thermal expansion metal material, (6) is a ceramic valve seat made of a ceramic material such as silicon carbide, and (7) is a metal valve box, which is made of ceramic. A valve body (4) and a metal stem (1) that supports the valve body (4).
) as a cushioning material between the valve body holder made of low thermal expansion metal (
3) is inserted by shrink fitting, and a ceramic valve seat (6) is installed.
A low thermal expansion metal valve seat holder (5) is inserted as a cushioning material between the valve seat (6) and a metal valve box (7) that supports the valve seat (6) by shrink fitting. In addition, the above ceramic valve body (4
), (4a) is the central shaft made of high-strength ceramics.
（４ｂ）がセラミックス製外周部、 （４ｃ）が同中心
軸部（４ａ）と同外周部（４ｂ）とを接合するガラス系
等の接着剤で、同中心軸部（４ａ）と同外周部（４ｂ）
とが同接着剤（４ｃ）を介して一体的に結合されている
。なお中心軸部（４ａ）と外周部（４ｂ）とは９組み付
は後。(4b) is a ceramic outer peripheral part, (4c) is a glass-based adhesive or other adhesive that joins the concentric shaft part (4a) and the same outer peripheral part (4b); (4b)
are integrally connected via the same adhesive (4c). The center shaft part (4a) and outer peripheral part (4b) are assembled later.
下方に抜は出ないようにそれぞれにストッパ用肩部を設
けている。Each has a shoulder for a stopper to prevent it from pulling out downwards.
次に前記第１．２図に示す高温・高差圧弁の作用を具体
的に説明する。セラミックス製弁体（４）と同弁体（４
）を支持する金属製ステム（１）との間に緩衝材として
低熱膨張金属製弁体ホルダー（３）、即ち、線熱膨張係
数がセラミックス材例えば炭化珪素と金属材例えばＪＩ
Ｓの５Ｕ）Ｉ−６００材との中間的な値をもつ例えばイ
ンコロイ９０３材により構成された低熱膨張全屈製弁体
ホルダー（３）を坑底めにより介装し、セラミックス製
弁座（６）と同弁座（６）を支持する金属製弁！（７）
との間に緩衝材として例えばインコロイ９０３材により
構成された低熱膨張金属製弁座ホルダー（５）を坑底め
によりを介装しており、金属材料とセラミックス材料と
の接合が容易に行われる。上記低熱膨張金属製弁体ホル
ダー（３）及び上記低熱膨張金属製弁座ホルダー（５）
の線熱膨張係数は、セラミックス製弁体（４）及び弁座
（６）（炭化珪素）の４゜４Ｘ１０−’、金属製ステム
（１）及び金属製弁箱（７）の１５．６Ｘ１０−’に対
して７Ｘ１０−’であり、セラミックス製弁体（４）と
同弁体（４）を支持する金属製ステム（１）との熱膨張
差、及びセラミックス製弁座（６）と同弁座（６）を支
持する金属製弁箱（７）との熱膨張差が低熱膨張金属製
弁体ホルダー（３）及び低熱膨張金１ｍ！！！弁座ホル
ダー（５）により吸収されて、上記熱膨張差に基づく同
弁体（４）及び同弁座（６）の破損が防止される。Next, the operation of the high temperature/high differential pressure valve shown in FIG. 1.2 will be specifically explained. Ceramic valve body (4) and the same valve body (4)
) and the metal stem (1) that supports the valve body (3) as a cushioning material.
A low thermal expansion full bend valve body holder (3) made of, for example, Incoloy 903 material, which has an intermediate value between S5U) I-600 material, is inserted at the bottom of the hole, and a ceramic valve seat (6 ) and a metal valve that supports the same valve seat (6)! (7)
A low thermal expansion metal valve seat holder (5) made of, for example, Incoloy 903 material is interposed between the shaft and the shaft as a buffer material at the bottom of the well, making it easy to join the metal material and the ceramic material. . The above low thermal expansion metal valve body holder (3) and the above low thermal expansion metal valve seat holder (5)
The coefficient of linear thermal expansion is 4°4X10-' for the ceramic valve body (4) and valve seat (6) (silicon carbide), and 15.6X10-' for the metal stem (1) and metal valve box (7). 7X10-', and the difference in thermal expansion between the ceramic valve body (4) and the metal stem (1) that supports the valve body (4), and the difference in thermal expansion between the ceramic valve seat (6) and the valve body (4). The difference in thermal expansion from the metal valve box (7) that supports the seat (6) is low thermal expansion metal valve body holder (3) and low thermal expansion gold 1m! ! ! This is absorbed by the valve seat holder (5) and prevents damage to the valve body (4) and valve seat (6) due to the difference in thermal expansion.
また弁体（４）が高強度セラミックス製中心軸部（４ａ
）とセラミックス製外周部（４ｂ）とにより構成され、
同高強度セラミックス製中心軸部（４ａ）が同セラミッ
クス製外周部（４ｂ）にガラス系等の接着剤（４Ｃ）を
介して一体的に結合されており、開弁と同時にセラミッ
クス製弁体（４）が急速に加熱されて。In addition, the valve body (4) has a central shaft portion (4a) made of high-strength ceramics.
) and a ceramic outer peripheral part (4b),
The central shaft part (4a) made of the same high-strength ceramic is integrally bonded to the outer peripheral part (4b) made of the same ceramic through an adhesive (4C) such as glass, and the ceramic valve body ( 4) is heated rapidly.
弁体中心部付近に熱衝撃により最大引張り応力が働いて
も、セラミックス製弁体（４）の中心部が破壊されない
。Even if the maximum tensile stress acts near the center of the valve body due to thermal shock, the center of the ceramic valve body (4) will not be destroyed.
（発明の効果）
本発明の高温・高差圧弁は前記のように弁体をセラミッ
クス製中心軸部とセラミックス製外周部とにより構成し
、弁座をセラミックスにより構成し、上記セラミックス
製弁体と同弁体を支持する金属製部材との間、及び上記
セラミックス製弁座と同弁座を支持する金属製部材との
間に緩衝材として低熱膨張金属材を坑底めにより介装し
ている。(Effects of the Invention) As described above, the high temperature/high differential pressure valve of the present invention has a valve body composed of a ceramic central shaft portion and a ceramic outer circumferential portion, a valve seat made of ceramics, and a valve body made of ceramics. A low thermal expansion metal material is interposed at the bottom of the hole as a buffer material between the valve body and the metal member supporting the valve body, and between the ceramic valve seat and the metal member supporting the valve seat. .
同低熱膨張金属材の線熱膨張係数は、セラミックス製弁
体及び弁座の４．４Ｘ１０−’、金属製部材の１５．６
Ｘ１０−”に対して７×ｌＯ″″６であり、セラミック
ス製弁体と同弁体を支持する金属製部材との熱膨張差、
及びセラミックス製弁座と同弁座を支持する金属製部材
との熱膨張差を同低熱膨張金属材により吸収できて、上
記熱膨張差に基づく同弁体及び同弁座の破損を防止でき
る。The linear thermal expansion coefficient of the low thermal expansion metal material is 4.4X10-' for the ceramic valve body and valve seat, and 15.6 for the metal member.
X10-'' is 7×lO''''6, and the difference in thermal expansion between the ceramic valve body and the metal member that supports the valve body,
The difference in thermal expansion between the ceramic valve seat and the metal member supporting the valve seat can be absorbed by the low thermal expansion metal material, and damage to the valve body and the valve seat due to the difference in thermal expansion can be prevented.
また弁体が高強度セラミックス製中心軸部とセラミック
ス製外周部とにより構成され、同高強度セラミックス製
中心軸部が同セラミックス製外周部にガラス系等の接着
剤を介して一体的に結合されており、開弁と同時にセラ
ミックス製弁体が急速に加熱されて、弁体中心部付近に
熱衝撃により最大引張り応力が働いても、セラミツ、ク
ス製弁体中心部の破壊を防止できる効果がある。In addition, the valve body is composed of a central shaft made of high-strength ceramics and an outer peripheral part made of ceramics, and the central shaft part made of high-strength ceramics is integrally bonded to the outer peripheral part made of ceramics via a glass-based adhesive or the like. Even if the ceramic valve body is rapidly heated at the same time as the valve is opened, and maximum tensile stress is applied near the center of the valve body due to thermal shock, the ceramic valve body can be prevented from breaking at the center of the valve body. be.
第１図は本発明に係わる高温、高差圧弁の一実施例を示
す縦断側面図、第２図はセラミックス製弁体を示す縦断
側面図である。
（１） ・・・弁体（４）を支持する金属製部材。
（３） （５）・・・低熱膨張金属材。
（４）・・・セラミックス製弁体。
（４ａ）・・・弁体（４）のセラミックス製中心軸部。
（４ｂ）・・・弁体（４）のセラミックス製外周部。
（６） ・・・セラミックス製弁座。
（７）・・・弁座（６）を支持する金属製部材。FIG. 1 is a longitudinal sectional side view showing an embodiment of a high temperature, high differential pressure valve according to the present invention, and FIG. 2 is a longitudinal sectional side view showing a ceramic valve body. (1) ...Metal member that supports the valve body (4). (3) (5)...Low thermal expansion metal material. (4) Ceramic valve body. (4a)... Ceramic central shaft portion of the valve body (4). (4b)... Ceramic outer peripheral part of the valve body (4). (6) Ceramic valve seat. (7)...Metal member that supports the valve seat (6).
Claims (1)
弁において、弁体をセラミツクス製中心軸部とセラミツ
クス製外周部とにより構成し、弁座をセラミツクスによ
り構成し、上記セラミツクス製弁体と同弁体を支持する
金属製部材との間、及び上記セラミツクス製弁座と同弁
座を支持する金属製部材との間に緩衝材として低熱膨張
金属材を焼嵌めにより介装したことを特徴とする高温・
高差圧弁。In a high temperature/high differential pressure valve provided in a flow path through which a high temperature/high pressure working fluid flows, the valve body is composed of a central shaft made of ceramics and an outer peripheral part made of ceramics, the valve seat is composed of ceramics, and the valve body made of ceramics is made of ceramics. and a metal member supporting the valve body, and between the ceramic valve seat and the metal member supporting the valve seat, a low thermal expansion metal material is inserted as a buffer material by shrink fitting. Characterized by high temperature and
High differential pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4530587A JPS63214579A (en) | 1987-03-02 | 1987-03-02 | High-temperature, high-pressure difference valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4530587A JPS63214579A (en) | 1987-03-02 | 1987-03-02 | High-temperature, high-pressure difference valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63214579A true JPS63214579A (en) | 1988-09-07 |
Family
ID=12715604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4530587A Pending JPS63214579A (en) | 1987-03-02 | 1987-03-02 | High-temperature, high-pressure difference valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63214579A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278978A1 (en) * | 2000-04-11 | 2003-01-29 | Caldera Engineering, LC | Double-seated shutoff valve |
| JP2010537138A (en) * | 2007-08-23 | 2010-12-02 | フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー | Device for connecting a valve shaft to a valve member |
| WO2019181427A1 (en) * | 2018-03-22 | 2019-09-26 | 株式会社不二工機 | Electric valve |
-
1987
- 1987-03-02 JP JP4530587A patent/JPS63214579A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278978A1 (en) * | 2000-04-11 | 2003-01-29 | Caldera Engineering, LC | Double-seated shutoff valve |
| EP1278978A4 (en) * | 2000-04-11 | 2005-09-21 | Caldera Engineering Lc | Double-seated shutoff valve |
| JP2010537138A (en) * | 2007-08-23 | 2010-12-02 | フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー | Device for connecting a valve shaft to a valve member |
| WO2019181427A1 (en) * | 2018-03-22 | 2019-09-26 | 株式会社不二工機 | Electric valve |
| JPWO2019181427A1 (en) * | 2018-03-22 | 2020-04-30 | 株式会社不二工機 | Motorized valve |
| JP2020109323A (en) * | 2018-03-22 | 2020-07-16 | 株式会社不二工機 | Motor valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0224345A1 (en) | Valve seat insert and cylinder head with the valve seat insert | |
| JP5119274B2 (en) | Glow plug | |
| JP2005265850A5 (en) | ||
| JP4625035B2 (en) | Shaft assembly | |
| US5104747A (en) | Joined assembly of ceramic and metallic materials | |
| JPH02185606A (en) | Improved ceramic chip type pivot rod and manufacture thereof | |
| JPS63214579A (en) | High-temperature, high-pressure difference valve | |
| JPH0336787B2 (en) | ||
| JP3665407B2 (en) | Industrial furnace radiant tube | |
| JPH0674811B2 (en) | Manufacturing method of sliding parts | |
| JPH061701U (en) | Joining structure of metal rotating shaft and ceramic rotating body | |
| JPH0351321Y2 (en) | ||
| JPH0217124Y2 (en) | ||
| JPH0425564Y2 (en) | ||
| JPH0248645Y2 (en) | ||
| JPS6278402A (en) | Ceramic turbo rotor | |
| JPH0532701Y2 (en) | ||
| JP2001074149A (en) | Ceramic valve element for ball valve | |
| JP2003130255A (en) | Pipe joint body | |
| JPH0137238B2 (en) | ||
| JPH0552269A (en) | Structure of valve body seat part | |
| JPH0457850B2 (en) | ||
| KR0122962Y1 (en) | Oxygen sensor probe for boiler | |
| JPH1114015A (en) | Ceramic tube with metallic flange | |
| JPS62143881A (en) | Method of joining ceramics |