KR200341469Y1 - A butterfly valve - Google Patents
A butterfly valve Download PDFInfo
- Publication number
- KR200341469Y1 KR200341469Y1 KR20-2003-0036671U KR20030036671U KR200341469Y1 KR 200341469 Y1 KR200341469 Y1 KR 200341469Y1 KR 20030036671 U KR20030036671 U KR 20030036671U KR 200341469 Y1 KR200341469 Y1 KR 200341469Y1
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- valve housing
- ring body
- metal ring
- valve seat
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 235000014121 butter Nutrition 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0218—Butterfly valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
본 고안은 수밀성이 향상되고, 인체에 유해한 재료가 사용되지 않아 상수도 관로에도 적용될 수 있으며, 장기간 사용하더라도 틈새가 발생되지 않으므로 구조적으로 견고한 버터플라이 밸브에 관한 것이다.The present invention improves the watertightness, can be applied to the water supply pipeline because no harmful material is used, and even a long-term use relates to a structurally robust butterfly valve.
본 고안에 따르면, 내주면에 환형의 밸브시트(17)가 구비된 밸브하우징(15)과, 이 밸브하우징(15)의 내부에 회전축(30)을 통해 회전 가능하게 설치되는 밸브디스크(25)를 포함하며, 상기 밸브디스크(25)의 회전에 따라 밸브하우징(15)의 양측에 연결된 관로를 개폐하도록 된 통상의 버터플라이 밸브에 있어서, 그 외주부가 상기 밸브시트(17)에 안착되어 고정되고 상기 밸브시트(25)의 둘레부와 접촉되는 내주부는 상기 밸브디스크(25)의 둘레부에 선접촉되도록 만곡 성형된 만곡부(44)로 이루어진 금속링체(40)와, 이 금속링체(40)의 만곡부(44)에 내장되어 이 만곡부(44)의 외표면이 상기 밸브디스크(25)의 둘레부에 탄성적으로 가압 밀착되도록 하는 환형의 탄성시트부재(50)를 포함하여 구성된 것을 특징으로 하는 버터플라이 밸브가 제공된다.According to the present invention, the valve housing (15) provided with an annular valve seat (17) on the inner circumferential surface, and the valve disc (25) rotatably installed through the rotating shaft (30) inside the valve housing (15). In the conventional butterfly valve to open and close the conduit connected to both sides of the valve housing 15 in accordance with the rotation of the valve disk 25, the outer peripheral portion is seated and fixed to the valve seat 17 The inner circumferential portion in contact with the circumferential portion of the valve seat 25 is composed of a metal ring body 40 formed of a curved portion 44 which is bent and formed to be in linear contact with the circumference of the valve disc 25, and the metal ring body 40 Butter, characterized in that it comprises an annular elastic sheet member 50 embedded in the bent portion 44 so that the outer surface of the bent portion 44 is elastically pressed close to the circumference of the valve disk 25 Fly valves are provided.
Description
본 고안은 버터플라이 밸브에 관한 것으로, 보다 상세하게는 수밀성이 향상되고, 인체에 유해한 재료가 사용되지 않아 상수도 관로에도 제한 없이 적용될 수 있도록 된 버터플라이 밸브에 관한 것이다.The present invention relates to a butterfly valve, and more particularly, to a butterfly valve that is improved in watertightness and can be applied to water supply pipelines without any harmful materials.
일반적으로, 버터플라이 밸브는 내주면에 환형의 밸브시트가 구비된 밸브하우징의 내부에 밸브디스크가 회전 가능하게 설치된 것으로, 상기 밸브디스크를 지지하는 회전축은 밸브하우징의 외부로 돌출되어 이 회전축을 인력 또는 기계적 동력을 이용하여 회전시킴으로써 밸브하우징 양측에 연결된 관로를 개폐하도록 구성된다. 이때, 상기 밸브디스크의 둘레부에는 밸브시트와의 밀착을 위해 실링부재가 설치되는데, 상기 실링부재로 스텐레스재질의 링체와 흑연재질의 링체를 교대로 배치하여 적층한 메탈시트 링이 주로 적용된다.In general, a butterfly valve has a valve disc rotatably installed in a valve housing having an annular valve seat on an inner circumferential surface thereof, and a rotating shaft supporting the valve disc protrudes out of the valve housing to attract or rotate the rotating shaft. It is configured to open and close a pipeline connected to both sides of the valve housing by rotating by using mechanical power. In this case, a sealing member is installed at the periphery of the valve disc to closely contact the valve seat, and a metal seat ring in which a stainless ring and a graphite ring are alternately arranged as the sealing member is mainly applied.
그런데, 상기 메탈시트 링은 밸브시트에 면접촉되어 밀착성이 떨어지기 때문에, 수밀 효과가 저하되는 문제점이 있다. 또한, 흑연은 인체에 유해한 성분이기 때문에, 상수도 관로에는 적용할 수 없으며, 장기간 사용하게 되면 상기 스텐레스층과 흑연층이 분리되면서 틈새가 발생되기 때문에, 수밀 기능이 급격하게 저하되는 문제점이 있다. 또한, 상기 밸브하우징은 주강으로 제작되는데, 주물 제작 과정에서 밸브하우징의 내부에 다수개의 기포가 발생된다. 이에 따라, 상기 밸브하우징과 관로를 용접하여 연결할 때, 기포들에 의해 용접 부위에서 크랙이 발생되므로, 이러한 크랙으로 인하여 누수가 발생되는 문제점이 있다.However, since the metal seat ring is in surface contact with the valve seat and inferior in adhesion, there is a problem in that the watertight effect is lowered. In addition, since graphite is a harmful component to the human body, it is not applicable to a water supply pipe, and when used for a long time, the stainless steel layer and the graphite layer are separated, resulting in a gap, so that the watertight function is sharply degraded. In addition, the valve housing is made of cast steel, a plurality of bubbles are generated inside the valve housing in the casting manufacturing process. Accordingly, when the valve housing and the pipe are welded to each other, cracks are generated at the welded portion due to the bubbles, so that there is a problem of leakage due to such cracks.
본 고안은 전술한 바와 같은 문제점을 해결하기 위한 것으로, 본 고안의 목적은 수밀성이 향상되고, 인체에 유해한 재료가 사용되지 않아 상수도 관로에도 적용될 수 있으며, 장기간 사용하더라도 틈새가 발생되지 않으므로 구조적으로 견고한 버터플라이 밸브를 제공하고자 하는 것이다.The present invention is to solve the problems as described above, the purpose of the present invention is to improve the watertightness, the material is not harmful to the human body can be applied to the water supply pipeline because it is not used, long-term use does not generate a gap, structurally robust It is to provide a butterfly valve.
도 1은 본 고안에 의한 버터플라이 밸브의 측단면도1 is a side cross-sectional view of a butterfly valve according to the present invention
도 2는 도 1의 우측면도FIG. 2 is a right side view of FIG. 1
＜도면의 주요부분에 대한 부호의 설명><Explanation of symbols for main parts of the drawings>
40. 금속링체 44. 만곡부40. Metal ring body 44. Curved part
50. 탄성시트부재50. Elastic sheet member
본 고안에 따르면, 내주면에 환형의 밸브시트(17)가 구비된 밸브하우징(15)과, 이 밸브하우징(15)의 내부에 회전축(30)을 통해 회전 가능하게 설치되는 밸브디스크(25)를 포함하며, 상기 밸브디스크(25)의 회전에 따라 밸브하우징(15)의 양측에 연결된 관로를 개폐하도록 된 통상의 버터플라이 밸브에 있어서, 그 외주부가 상기 밸브시트(17)에 안착되어 고정되고 상기 밸브시트(25)의 둘레부와 접촉되는 내주부는 상기 밸브디스크(25)의 둘레부에 선접촉되도록 만곡 성형된 만곡부(44)로 이루어진 금속링체(40)와, 이 금속링체(40)의 만곡부(44)에 내장되어 이 만곡부(44)의 외표면이 상기 밸브디스크(25)의 둘레부에 탄성적으로 가압 밀착되도록 하는 환형의 탄성시트부재(50)를 포함하여 구성된 것을 특징으로 하는 버터플라이 밸브가 제공된다.According to the present invention, the valve housing (15) provided with an annular valve seat (17) on the inner circumferential surface, and the valve disc (25) rotatably installed through the rotating shaft (30) inside the valve housing (15). In the conventional butterfly valve to open and close the conduit connected to both sides of the valve housing 15 in accordance with the rotation of the valve disk 25, the outer peripheral portion is seated and fixed to the valve seat 17 The inner circumferential portion in contact with the circumferential portion of the valve seat 25 is composed of a metal ring body 40 formed of a curved portion 44 which is bent and formed to be in linear contact with the circumference of the valve disc 25, and the metal ring body 40 Butter, characterized in that it comprises an annular elastic sheet member 50 embedded in the bent portion 44 so that the outer surface of the bent portion 44 is elastically pressed close to the circumference of the valve disk 25 Fly valves are provided.
본 고안의 다른 특징에 따르면, 상기 밸브하우징(15)은 압연재 강판을 롤링하여 용접하여 제작된 것을 특징으로 하는 버터플라이 밸브가 제공된다.According to another feature of the present invention, the valve housing 15 is provided with a butterfly valve, characterized in that manufactured by rolling a rolled steel sheet.
이하, 첨부된 도면을 참조하여 본 고안에 따른 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 고안에 의한 버터플라이 밸브의 종단면도, 도 2는 도 1의 우측면도이다. 도시된 바와 같이, 본 고안은 내주면에 환형의 밸브시트(17)가 구비된 밸브하우징(15)의 내부에 회전축(30)을 매개로 밸브디스크(25)가 회전 가능하게 설치되어 이루어진 것은 종래와 동일하다. 이때, 상기 밸브시트(17)의 내주면에는 금속링체(40)가 설치되고, 이 금속링체(40)에는 탄성시트부재(50)가 내장된다.1 is a longitudinal cross-sectional view of a butterfly valve according to the present invention, Figure 2 is a right side view of FIG. As shown, the present invention is made of the valve disc 25 is rotatably installed through the rotation shaft 30 in the valve housing 15 provided with an annular valve seat 17 on the inner circumferential surface is conventional and same. At this time, a metal ring body 40 is installed on the inner circumferential surface of the valve seat 17, and the elastic seat member 50 is embedded in the metal ring body 40.
상기 밸브시트(17)에는 환형의 오목한 안착부(18)가 형성되어, 이 안착부(18)에 상기 금속링체(40)의 외주부가 안착되어 고정된다. 또한, 상기 금속링체(40)는 밸브디스크(25)의 둘레부와 접촉되는 내주부가 단면 고리 형태로 만곡 성형된 만곡부(44)로 이루어진다. 이 만곡부(44)의 외표면은 상기 밸브시트(17)의 내주면에서 돌출되어 상기 밸브디스크(25)의 둘레부에 선접촉된다.An annular concave seating portion 18 is formed in the valve seat 17, and the outer peripheral portion of the metal ring body 40 is seated and fixed to the seating portion 18. In addition, the metal ring body 40 is composed of a curved portion 44, the inner circumferential portion in contact with the circumferential portion of the valve disk 25 is bent in the shape of a cross section. The outer surface of the curved portion 44 protrudes from the inner circumferential surface of the valve seat 17 and is in linear contact with the circumference of the valve disc 25.
상기 탄성시트부재(50)는 환형으로 제작되는 것으로, 상기 금속링체(40)의 만곡부(44)에 내장된다. 이 탄성시트부재(50)는 탄성의 실리콘으로 이루어져, 상기 만곡부(44)의 외표면이 밸브디스크(25)의 둘레부에 탄성적으로 가압 밀착되도록 하는데, 상기 만곡부(44)가 밸브디스크(25)의 둘레부에 선접촉되어 있기 때문에, 상기 탄성시트부재(50)의 탄성력이 상기 만곡부(44)의 선접촉면을 따라 집중적으로작용한다. 이에 따라, 상기 밸브시트(17)와 면으로 접촉되었던 종래의 메탈시트 링에 비하여 상기 만곡부(44)와 밸브시트(17)의 밀착력이 향상되므로, 수밀성이 현저히 향상될 수 있다.The elastic sheet member 50 is manufactured in an annular shape, and is embedded in the curved portion 44 of the metal ring body 40. The elastic sheet member 50 is made of elastic silicone so that the outer surface of the curved portion 44 is elastically pressed close to the circumference of the valve disk 25, the curved portion 44 is the valve disk 25 Since it is in line contact with the circumference, the elastic force of the elastic sheet member 50 acts intensively along the line contact surface of the curved portion 44. Accordingly, the adhesion between the curved portion 44 and the valve seat 17 is improved as compared with the conventional metal seat ring which is in surface contact with the valve seat 17, so that the watertightness can be remarkably improved.
한편, 상기 밸브하우징(15)은 압연재 강판을 롤링하여 용접하여 제작되기 때문에, 상기 밸브하우징(15)을 주강으로 제작한 종래와 달리 밸브하우징(15)의 내부에 기포가 발생되지 않게 된다. 이에 따라, 상기 밸브하우징(15)과 관로를 용접할 때 밸브하우징(15)의 내부에 발생된 기포에 의해 크랙이 발생되는 경우가 없기 때문에, 이러한 크랙으로 인한 누수가 발생되지 않게 된다.On the other hand, since the valve housing 15 is manufactured by rolling and welding a rolled steel sheet, unlike the conventional case in which the valve housing 15 is made of cast steel, bubbles are not generated in the valve housing 15. Accordingly, when the valve housing 15 and the conduit are welded, no crack is generated by bubbles generated inside the valve housing 15, so that leakage due to such cracks does not occur.
따라서, 상기 버터플라이 밸브는 상기 금속링체(40)의 만곡면이 밸브디스크(25)의 둘레부에 선접촉되고 상기 만곡면에 내장된 탄성시트부재(50)에 의해 상기 만곡면의 선접촉부가 밸브디스크(25)의 둘레부에 탄성적으로 가압 밀착되면서 밀착성이 향상되기 때문에, 종래에 비하여 수밀성이 향상되는 장점이 있다. 또한, 종래의 메탈시트 링과 달리 인체에 유해한 흑연이 사용되지 않기 때문에, 상수도 관로에도 제한 없이 적용될 수 있다. 또한, 종래의 메탈시트 링은 흑연층과 스텐레스층이 라미네이팅되어, 장기간 사용시 스텐레스층과 흑연층이 분리되면서 틈새가 발생되는 등 수밀성이 급격히 저하되는 단점이 있으나, 본 고안은 금속링체(40) 만곡면에 환형의 탄성시트부재(50)가 내장되어, 상기 스텐레스층과 흑연층의 분리로 인한 틈새가 발생되지 않기 때문에, 종래에 비하여 수밀성이 급격하게 저하되는 일이 없게 된다.Accordingly, in the butterfly valve, the curved surface of the metal ring body 40 is in line contact with the circumference of the valve disc 25 and the linear contact portion of the curved surface is formed by the elastic sheet member 50 embedded in the curved surface. Since the adhesiveness is improved while being elastically pressed close to the circumference of the valve disc 25, there is an advantage that the watertightness is improved compared to the conventional. In addition, unlike the conventional metal sheet ring, since harmful graphite is not used, it can be applied without limitation to the water supply pipe. In addition, the conventional metal sheet ring has a disadvantage in that the watertightness is drastically deteriorated such that the graphite layer and the stainless layer are laminated, and a gap is generated while the stainless layer and the graphite layer are separated during long-term use, but the present invention has a curved metal ring body 40. Since the annular elastic sheet member 50 is embedded in the surface, and a gap is not generated due to the separation of the stainless layer and the graphite layer, the watertightness is not drastically lowered as compared with the prior art.
또한, 상기 밸브하우징(15)은 압연재 강판을 롤링하여 용접하여 제작되어 그내부에 기포가 발생되지 않게 된다. 이에 따라, 상기 밸브하우징(15)과 관로를 용접할 때, 이러한 기포들에 의해 용접 부위에서 크랙이 발생되는 경우가 없으므로, 종래와 달리, 상기 밸브하우징(15)과 관로 용접시 유발되는 크랙에 의해 누수가 발생되는 것을 방지하는 장점이 있다.In addition, the valve housing 15 is manufactured by rolling and rolling a rolled steel sheet so that bubbles are not generated therein. Accordingly, when welding the valve housing 15 and the conduit, since no cracks are generated at the welded portion due to these bubbles, unlike the related art, cracks caused when welding the valve housing 15 and the conduit are prevented. There is an advantage of preventing the leakage of water.
이상에서와 같이 본 고안에 의하면, 상기 밸브시트에 설치된 금속링체의 만곡면이 밸브디스크의 둘레부에 선접촉되어 탄성시트부재에 의해 탄성적으로 가압 밀착되기 때문에, 수밀성이 향상되고, 인체에 유해한 재료가 사용되지 않아 상수도 관로에도 제한 없이 적용될 수 있고, 장기간 사용하더라도 틈새가 발생되지 않으므로, 수밀성이 저하되는 것을 방지하며, 상기 밸브하우징 관로를 용접할 때 발생되는 크랙에 의해 누수가 발생하는 것을 방지하도록 된 버터플라이 밸브가 제공된다.According to the present invention as described above, since the curved surface of the metal ring body provided in the valve seat is in linear contact with the circumference of the valve disk and elastically press-contacted by the elastic seat member, the watertightness is improved and harmful to the human body. Since no material is used, it can be applied to water supply pipes without restriction, and even a long time use does not generate a gap, thereby preventing water tightness from deteriorating and preventing leakage caused by cracks generated when welding the valve housing pipe. A butterfly valve is provided.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2003-0036671U KR200341469Y1 (en) | 2003-11-24 | 2003-11-24 | A butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2003-0036671U KR200341469Y1 (en) | 2003-11-24 | 2003-11-24 | A butterfly valve |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020030083608A Division KR100573852B1 (en) | 2003-11-24 | 2003-11-24 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR200341469Y1 true KR200341469Y1 (en) | 2004-02-14 |
Family
ID=49424466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20-2003-0036671U KR200341469Y1 (en) | 2003-11-24 | 2003-11-24 | A butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR200341469Y1 (en) |
-
2003
- 2003-11-24 KR KR20-2003-0036671U patent/KR200341469Y1/en not_active IP Right Cessation
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4358086A (en) | Butterfly valve | |
| JP2011058509A (en) | Butterfly valve | |
| TWI310072B (en) | ||
| KR200341469Y1 (en) | A butterfly valve | |
| KR100573852B1 (en) | Butterfly valve | |
| TW201638505A (en) | Mechanical seal device, double seal device, and double mechanical seal device | |
| JP3407436B2 (en) | Sealing device | |
| KR200443622Y1 (en) | Butterfly Valve with Flexible Metal Seat | |
| KR200224585Y1 (en) | Butterfly valve | |
| KR200254812Y1 (en) | Double sealing metal seat for butterfly valve | |
| JP2003307224A (en) | Water pump bearing seal device | |
| KR200295954Y1 (en) | Double sealing structure for butterfly valve | |
| JPS5848438Y2 (en) | Butterfly valve seat ring | |
| KR200326530Y1 (en) | Butterfly valve | |
| KR100758598B1 (en) | Butterfly valve | |
| KR200224576Y1 (en) | Double non-leakge butterfly valve | |
| KR200237273Y1 (en) | Body seat structure of butterfly valve | |
| CN220646799U (en) | High stability butterfly valve | |
| JP3218286B2 (en) | Butterfly valve | |
| JPS6017573Y2 (en) | butterfly valve | |
| KR20190023526A (en) | Butterfly valve with sealing control function | |
| JP2011190907A (en) | Ball valve and seat ring for ball valve | |
| JPH0138376Y2 (en) | ||
| JP2004360739A (en) | Butterfly valve | |
| KR200274168Y1 (en) | A flange type butterfly valve with eccentric metal seat for ensuring high temperature and high pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| U107 | Dual application of utility model | ||
| UA0107 | Dual application for utility model registration |
Comment text: Dual Application of Utility Model Registration Patent event date: 20031124 Patent event code: UA01011R07D |
|
| REGI | Registration of establishment | ||
| UR0701 | Registration of establishment |
Patent event date: 20040130 Patent event code: UR07011E01D Comment text: Registration of Establishment |
|
| UR1002 | Payment of registration fee |
Start annual number: 1 End annual number: 1 Payment date: 20031125 |
|
| UG1601 | Publication of registration | ||
| FPAY | Annual fee payment |
Payment date: 20050110 Year of fee payment: 3 |
|
| UR1001 | Payment of annual fee |
Payment date: 20050110 Start annual number: 2 End annual number: 3 |
|
| EXTG | Ip right invalidated | ||
| UC2102 | Extinguishment |