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KR200426895Y1 - Triple eccentric butterfly valve with double exchaneable sealing part - Google Patents

Triple eccentric butterfly valve with double exchaneable sealing part Download PDF

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Publication number
KR200426895Y1
KR200426895Y1 KR2020060018444U KR20060018444U KR200426895Y1 KR 200426895 Y1 KR200426895 Y1 KR 200426895Y1 KR 2020060018444 U KR2020060018444 U KR 2020060018444U KR 20060018444 U KR20060018444 U KR 20060018444U KR 200426895 Y1 KR200426895 Y1 KR 200426895Y1
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South Korea
Prior art keywords
valve
seat ring
valve body
disc
sealing member
Prior art date
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KR2020060018444U
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Korean (ko)
Inventor
박정헌
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주식회사 시퍼스밸브
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Priority to KR2020060018444U priority Critical patent/KR200426895Y1/en
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Publication of KR200426895Y1 publication Critical patent/KR200426895Y1/en

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    • 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
    • F16K1/16—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
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K1/38—Valve members of conical shape
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

본 고안은, 버터플라이 밸브를 3중으로 편심되도록 하되, 디스크시트 링이 착탈식으로 마련되어 디스크시트 링의 손상시 디스크 자체를 교환하지 않고 디스크시트 링을 교환하도록 하고 있을 뿐만 아니라, 밸브몸통에 마련되는 실링면을, 교환형 실링부재에 형성되도록 하고, 교환형 실링부재를 밸브몸통에 착탈가능하게 마련함으로써, 실링면의 손상시 밸브몸통 전체를 교환하지 않고 교환형 실링부재만을 교환하도록 하고있다.The present invention allows the butterfly valve to be eccentrically tripled, but the disc seat ring is detachably provided so that the disc seat ring can be replaced without replacing the disc itself when the disc seat ring is damaged. The surface is formed on the replaceable sealing member and the replaceable sealing member is detachably provided on the valve body so that only the replaceable sealing member is replaced without replacing the entire valve body when the sealing surface is damaged.

따라서 본 고안은 3중 편심 버터플라이 밸브에서 실링면과 디스크시트 링 모두를 교체할 수 있는 이중 교체형 실링부가 형성되도록 하여, 밸브몸통 자체 혹은 밸브디스크 자체를 교환하지 않는 3중 편심 버터플라이 밸브를 제공하게 된다.Therefore, the present invention is to form a double replaceable sealing portion that can replace both the sealing surface and the disk seat ring in the triple eccentric butterfly valve, so that the triple eccentric butterfly valve that does not replace the valve body itself or the valve disc itself Will be provided.

버터플라이밸브, 3중편심, 3차편심, 실링면, 디스크시트 링 Butterfly valve, triple eccentric, tertiary eccentric, sealing surface, disk seat ring

Description

이중 교체형 실링부가 구비된 3중편심 버터플라이 밸브{TRIPLE ECCENTRIC BUTTERFLY VALVE WITH DOUBLE EXCHANEABLE SEALING PART}TRIPLE ECCENTRIC BUTTERFLY VALVE WITH DOUBLE EXCHANEABLE SEALING PART}

도 1은 본 고안에 의한 일 실시례의 정면도,1 is a front view of an embodiment according to the present invention,

도 2는 도 1의 A-A선 단면도.2 is a cross-sectional view taken along the line A-A of FIG.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

100 : 밸브몸통 110 : 고정 볼트100: valve body 110: fixing bolt

120 : 교환형 실링부재 121 : 실링면120: replaceable sealing member 121: sealing surface

130 : 암나사부130: female thread

200 : 밸브디스크 210 : 디스크시트 링200: valve disc 210: disc seat ring

220 : 리테이너 230 : 리테이너 볼트220: retainer 230: retainer bolt

300 : 밸브대300: valve stem

본 고안은 배관라인에 마련되어 유체의 흐름을 제어 또는 차단하는 버터플라 이 밸브에 관한 것으로, 특히 밸브디스크가 밸브몸통에 대하여 3중편심된 버터플라이 밸브에 관한 것이다.The present invention relates to a butterfly valve provided in the piping line to control or block the flow of the fluid, and more particularly relates to a butterfly valve valve valve is three eccentric to the valve body.

3중편심 버터플라이 밸브에 관한 종래의 기술로서, 대한민국 실용신안등록 제20-0242558호 "버터플라이 밸브", 대한민국 특허등록 제10-0367532호 "삼차 편심구조를 갖는 메탈시트형 버터플라이 밸브", 대한민국 특허등록 제10-0387306호 "삼차 편심구조를 갖는 메탈시트형 버터플라이 밸브" 등이 알려져 있으며, 상기 종래의 기술들은 본 명세서에 일체화된 것으로 본다.As a conventional technology regarding a triple eccentric butterfly valve, Republic of Korea Utility Model Registration No. 20-0242558 "Butterfly Valve", Republic of Korea Patent Registration No. 10-0367532 "Metal seat type butterfly valve having a tertiary eccentric structure", Korea Patent Registration No. 10-0387306 "Metal seat type butterfly valve having a tertiary eccentric structure" and the like are known, the prior art is considered to be incorporated herein.

이러한 3중 편심구조의 버터플라이 밸브는 기본적으로 관내의 유체 흐름을 완전히 차단시키기 위해서는 밸브디스크의 디스크시트 링이 밸브몸통의 실링면과 접촉되어 유로 차단이 이루어진다.In this triple eccentric butterfly valve, in order to completely block the fluid flow in the pipe, the disk seat ring of the valve disc is in contact with the sealing surface of the valve body, thereby blocking the flow path.

즉 밸브몸통은 어느 정도의 탄성을 가지고 있는 밸브디스크의 디스크시트 링과 접촉되는 실링면을 가지게 되며, 실링면과 디스크시트 링의 접촉에 의하여 기밀이 유지된다.That is, the valve body has a sealing surface in contact with the disk seat ring of the valve disk having a certain degree of elasticity, and the airtightness is maintained by the contact between the sealing surface and the disk seat ring.

이와 같이 디스크시트 링과 실링면은 밸브 개폐시 기밀유지를 위하여 매우 중요한 부위이며, 따라서 이물질이나 기타 먼지 등으로 인하여 손상이 발생되어서는 아니된다.As such, the disc seat ring and the sealing surface are very important parts for airtightness when the valve is opened and closed, and therefore, no damage may occur due to foreign matter or other dust.

그러나 실제 사용환경 조건에서 디스크시트 링 혹은 실링면의 손상을 완전히 막는다는 것은 불가능하다.However, it is impossible to completely prevent damage to the disc seat ring or the sealing surface in actual use conditions.

따라서 이러한 경우 디스크시트 링 혹은 실링면을 교체하여야 한다.Therefore, in this case, the disc seat ring or sealing surface must be replaced.

이러한 문제에 대하여 종래의 기술들은 디스크시트 링 자체는 착탈식으로 밸브디스크에 부착하여 사용하고, 디스크시트 링의 손상이 발생할 경우 디스크시트 링을 교환하도록 처리하고 있다.Conventional techniques have dealt with this problem in that the disk seat ring itself is detachably attached to the valve disk and used to replace the disk seat ring when the disk seat ring is damaged.

반면 밸브몸통에 마련되는 실링면은 밸브몸통에 일체로 형성되는 관계로, 실링면의 손상이 발생할 경우 밸브몸통 전체를 교환하여야 한다는 문제가 있다.On the other hand, since the sealing surface provided on the valve body is formed integrally with the valve body, there is a problem that the entire valve body should be replaced when the sealing surface is damaged.

본 고안은 상기와 같은 종래 기술의 문제점에 착안하여 안출된 것으로서, 밸브몸통에 마련되는 실링면을, 교환형 실링부재에 형성되도록 하고, 교환형 실링부재를 밸브몸통에 착탈가능하게 마련함으로써, 실링면의 손상시 밸브몸통 전체를 교환하지 않고 교환형 실링부재만을 교환하도록 하고자 한다.The present invention is conceived in view of the problems of the prior art as described above, by providing a sealing surface provided on the valve body to the replaceable sealing member, and by providing a replaceable sealing member detachably to the valve body, When the surface is damaged, only the replaceable sealing member is to be replaced without replacing the entire valve body.

상기의 과제를 해결하기 위하여 본 고안은, 밸브디스크의 회전축인 밸브대를 밸브몸통의 실링라인에 대하여 이격시켜 일차편심시키며, 상기 밸브대를 밸브의 유로중심선에 대하여 이격시켜 이차편심시키며, 상기 원추형 밸브디스크의 기준축선을 회전시켜 삼차편심시킨 3중편심 버터플라이밸브에 있어서 : 상기 밸브디스크에 디스크시트 링이 착탈가능하게 마련되며, 상기 밸브몸통에 상기 디스크시트 링과 접촉되어 밸브의 유로를 폐쇄하도록 이루어진 실링면이 형성된 교환형 실링부재가 착탈가능하게 마련되는 것을 특징으로 한다.In order to solve the above problems, the present invention, the valve stem, which is the rotating shaft of the valve disc, is spaced apart from the sealing line of the valve body to primary eccentricity, and the valve stem is spaced apart from the channel center line of the valve to make the secondary eccentric, and the conical In a three eccentric butterfly valve in which the reference axis of the valve disc is rotated to a third eccentric, the valve seat ring is detachably provided on the valve disc, and the valve body is in contact with the disk seat ring to close the flow path of the valve. It is characterized in that the replaceable sealing member formed with a sealing surface made to be detachably provided.

상기에 있어서, 상기 밸브몸통에 암나사부가 형성되며, 상기 교환형 실링부재를 관통한 후 상기 암나사부에 결합되는 고정 볼트가 부가되는 것이 바람직하다.In the above, it is preferable that a female screw portion is formed in the valve body, and a fixing bolt coupled to the female screw portion is added after passing through the exchangeable sealing member.

이하 본 고안에 의한 일 실시례에 의거하여 그 구성과 작용을 상세히 설명한다.Hereinafter, the configuration and operation of the present invention will be described in detail.

도 1은 본 고안에 의한 일 실시례의 정면도이며, 도 2는 도 1의 A-A선 단면도이다.1 is a front view of an embodiment according to the present invention, Figure 2 is a cross-sectional view taken along the line A-A of FIG.

본 버터플라이밸브는 일반적인 버터플라이 밸브와 마찬가지로, 크게는 유로가 형성된 밸브몸통(100)과, 상기 밸브몸통(100)의 유로를 개폐하는 밸브디스크(200)와, 밸브디스크(200)의 회전축인 밸브대(300)로 이루어진다.The butterfly valve is a valve body 100 having a flow path, a valve disc 200 for opening and closing a flow path of the valve body 100, and a rotation shaft of the valve disc 200, like a general butterfly valve. The valve stem 300 is made.

본 버터플라이 밸브의 3중 편심구조를 설명한다.The triple eccentric structure of the butterfly valve will be described.

먼저 밸브대(300)는 밸브몸통(100)의 실링라인(A)에 대하여 a만큼 이격되어 일차편심된다. 실링라인(A)은 밸브디스크(200)와 밸브몸통(100)이 접촉되어 실링을 하는 면을 지나는 가상의 선을 말한다.First, the valve stem 300 is firstly eccentrically spaced apart by a with respect to the sealing line A of the valve body 100. Sealing line (A) refers to the imaginary line passing through the valve disk 200 and the valve body 100 in contact with the sealing.

또한 밸브대(300)는 밸브의 유로중심선(B)에 대하여 b만큼 이격되어 이차편심된다.In addition, the valve stem 300 is spaced apart by b with respect to the channel center line B of the valve to be secondary eccentric.

밸브의 유로중심선(B)이란 관로의 중심을 지나는 가상의 선을 말한다.The flow center line B of the valve refers to an imaginary line passing through the center of the pipeline.

이와 같이 2차 편심된 상태의 경우 밸브디스크(200) 및 밸브몸통(100)의 실링면은 원추형태를 이루게 되며, 그 원추의 기준축선은 유로중심선(B)과 평행하게 된다.As described above, in the case of the secondary eccentric state, the sealing surface of the valve disc 200 and the valve body 100 forms a cone shape, and the reference axis of the cone is parallel to the channel center line B.

이러한 상태에서 원추형 밸브디스크의 기준축선을 소정의 각도로 회전시키면 삼차편심이 이루어진다.In this state, when the reference axis of the conical valve disc is rotated at a predetermined angle, a third eccentricity is achieved.

삼차편심이 이루어진 상태의 밸브디스크(200) 및 밸브몸통(100)의 실링면은 도 2를 기준으로 좌우양측이 서로 대칭되지 않는 상태가 된다.The sealing surface of the valve disc 200 and the valve body 100 in a state where the third eccentricity is made is a state in which the left and right sides are not symmetrical with respect to FIG. 2.

한편, 밸브디스크(200)에는 디스크시트 링(210)이 착탈가능하게 마련된다.On the other hand, the valve disk 200 is provided with a disk seat ring 210 detachable.

이를 위하여 디스크시트 링(210)은 리테이너(220)와 밸브디스크(200) 사이에 삽입되어 고정되며, 리테이너(220)는 리테이너 볼트(230)에 의하여 밸브디스크(200)에 고정결합된다.To this end, the disk seat ring 210 is inserted and fixed between the retainer 220 and the valve disk 200, and the retainer 220 is fixedly coupled to the valve disk 200 by the retainer bolt 230.

따라서 디스크시트 링(210)의 손상이 발생할 경우 리테이너(220)를 밸브디스크(200)로부터 분리하여 디스크시트 링(210)을 교체할 수 있다.Therefore, when the disk seat ring 210 is damaged, the retainer 220 may be separated from the valve disk 200 to replace the disk seat ring 210.

한편, 밸브몸통(100)의 내주면에는 교환형 실링부재(120)가 마련된다.On the other hand, the inner circumferential surface of the valve body 100 is provided with a replaceable sealing member 120.

교환형 실링부재(120)는 고정 볼트(110)에 의하여 밸브몸통(100)에 착탈가능하게 고정되며, 이를 위하여 밸브몸통(100)에는 고정 볼트(110)가 결합될 수 있는 암나사부(130)가 형성된다.The exchangeable sealing member 120 is detachably fixed to the valve body 100 by the fixing bolt 110, and for this purpose, the female body 130 to which the fixing bolt 110 may be coupled to the valve body 100 is provided. Is formed.

교환형 실링부재(120)는 밸브몸통(100)과 동일한 재질로 이루어지는 것이 바람직하나, 필요에 따라서는 밸브몸통(100)과 상이한 재질로 이루어질 수 있다.Exchangeable sealing member 120 is preferably made of the same material as the valve body 100, if necessary may be made of a different material than the valve body (100).

교환형 실링부재(120)에는 디스크시트 링(210)과 접촉되어 밸브의 유로를 폐쇄하도록 이루어진 실링면(121)이 형성되어 있다.The exchangeable sealing member 120 has a sealing surface 121 formed in contact with the disk seat ring 210 to close the flow path of the valve.

따라서 밸브의 사용 도중 실링면(121)의 손상이 발생할 경우 고정 볼트(110) 를 체결 해제한 후 교환형 실링부재(120)를 교환함으로써 실링면(121)을 교체할 수 있게 되는 것이다.Therefore, when the sealing surface 121 is damaged during use of the valve, the sealing surface 121 can be replaced by replacing the replaceable sealing member 120 after releasing the fixing bolt 110.

상기의 실시례는 본 고안의 바람직한 실시례일 뿐이며 본 고안의 기술적 사상은 당업자에 의하여 다양하게 변형 내지 조정되어 실시될 수 있다. 이러한 변형 내지 조정이 본 고안의 기술적 사상을 이용한다면 이는 본 고안의 범위에 속하는 것이다.The above embodiments are only preferred embodiments of the present invention, and the technical idea of the present invention may be variously modified or adjusted by those skilled in the art. If such modifications or adjustments use the technical idea of the present invention, it is within the scope of the present invention.

상기와 같이 본 고안은, 3중편심 버터플라이 밸브에 있어서, 디스크시트 링이 착탈식으로 마련되어 디스크시트 링의 손상시 디스크 자체를 교환하지 않고 디스크시트 링을 교환하도록 하고 있을 뿐만 아니라, 밸브몸통에 마련되는 실링면을, 교환형 실링부재에 형성되도록 하고, 교환형 실링부재를 밸브몸통에 착탈가능하게 마련함으로써, 실링면의 손상시 밸브몸통 전체를 교환하지 않고 교환형 실링부재만을 교환하도록 하고있다.As described above, in the triple eccentric butterfly valve, the disc seat ring is detachably provided to replace the disc seat ring without replacing the disc itself when the disc seat ring is damaged, and is provided in the valve body. The sealing surface is formed on the replaceable sealing member and the replaceable sealing member is detachably provided on the valve body so that only the replaceable sealing member is replaced without replacing the entire valve body when the sealing surface is damaged.

따라서 본 고안은 3중 편심 버터플라이 밸브에서 실링면과 디스크시트 링 모두를 교체할 수 있는 이중 교체형 실링부가 형성되도록 하여, 밸브몸통 자체 혹은 밸브디스크 자체를 교환하지 않도록 하였다. Therefore, the present invention is to form a double replaceable sealing portion that can replace both the sealing surface and the disk seat ring in the triple eccentric butterfly valve, so as not to replace the valve body itself or the valve disk itself.

Claims (2)

밸브디스크의 회전축인 밸브대를 밸브몸통의 실링라인에 대하여 이격시켜 일차편심시키며, 상기 밸브대를 밸브의 유로중심선에 대하여 이격시켜 이차편심시키며, 상기 원추형 밸브디스크의 기준축선을 회전시켜 삼차편심시킨 3중편심 버터플라이밸브에 있어서 : The valve stem, which is the axis of rotation of the valve disk, is spaced apart from the sealing line of the valve body, and the first and second eccentrics are spaced apart from the channel center line of the valve. For triple eccentric butterfly valves: 상기 밸브디스크에 디스크시트 링이 착탈가능하게 마련되며,The disc seat ring is detachably provided on the valve disc, 상기 밸브몸통에 상기 디스크시트 링과 접촉되어 밸브의 유로를 폐쇄하도록 이루어진 실링면이 형성된 교환형 실링부재가 착탈가능하게 마련되는 것을 특징으로 하는 이중 교체형 실링부가 구비된 3중편심 버터플라이 밸브.And a replaceable sealing member having a sealing surface formed to be in contact with the disk seat ring to close the flow path of the valve to the valve body, wherein the replaceable sealing member is provided with a double replaceable sealing part. 제 1 항에 있어서,The method of claim 1, 상기 밸브몸통에 암나사부가 형성되며,A female thread portion is formed in the valve body, 상기 교환형 실링부재를 관통한 후 상기 암나사부에 결합되는 고정 볼트가 부가되는 것을 특징으로 하는 이중 교체형 실링부가 구비된 3중편심 버터플라이 밸브.The double eccentric butterfly valve with a double replaceable sealing portion characterized in that the fixing bolt is coupled to the female screw portion after passing through the exchangeable sealing member.
KR2020060018444U 2006-07-07 2006-07-07 Triple eccentric butterfly valve with double exchaneable sealing part KR200426895Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011143598A3 (en) * 2010-05-14 2012-02-16 Bray International, Inc. Valve assembly and method of using same
KR101403941B1 (en) 2013-12-30 2014-06-09 김만영 Butterfly valve having a moving seat

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011143598A3 (en) * 2010-05-14 2012-02-16 Bray International, Inc. Valve assembly and method of using same
CN103026109A (en) * 2010-05-14 2013-04-03 布雷国际有限公司 Valve assembly and method of using same
RU2586959C2 (en) * 2010-05-14 2016-06-10 Брэй Интернешнл, Инк. Valve assembly and method of using same
KR101403941B1 (en) 2013-12-30 2014-06-09 김만영 Butterfly valve having a moving seat

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