KR102527350B1 - HDPE BODY Butterfly valve - Google Patents

HDPE BODY Butterfly valve Download PDF

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Publication number
KR102527350B1
KR102527350B1 KR1020220133656A KR20220133656A KR102527350B1 KR 102527350 B1 KR102527350 B1 KR 102527350B1 KR 1020220133656 A KR1020220133656 A KR 1020220133656A KR 20220133656 A KR20220133656 A KR 20220133656A KR 102527350 B1 KR102527350 B1 KR 102527350B1
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KR
South Korea
Prior art keywords
flange
valve
valve housing
fastening
fastening member
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KR1020220133656A
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Korean (ko)
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조두혁
권명준
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주식회사 솔브
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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
    • 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
    • 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
    • F16K1/221—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 specially adapted operating means therefor
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/04—Arrangements for preventing erosion, not otherwise provided for

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

Abstract

The present invention relates to a HDPE body butterfly valve comprising: a valve housing (100) having a flow path formed therein and having both ends opened; a valve disk (200) installed inside the valve housing to be able to rotate and opening and closing the flow path when rotating; a drive shaft (230) and an auxiliary shaft (240) fixed to shaft supporting parts (210, 220) of the valve disk (200) while penetrating the valve housing (100) in a radial direction, and supporting the valve disk (200) to be able to rotate; a first flange (300) adhering closely to a flange (110) on one side surface of the valve housing (100); a second flange (400) adhering closely to a flange (310) on one side surface of the first flange (300) and mounted by a first coupling member (500); a third flange (600) adhering closely to a flange (120) on the other side surface of the valve housing (100) and having a valve seat (610), which is in surface contact with a disk seat (250) end of the valve disk (200) to be sealed, integrally formed to extend; and a fourth flange (700) adhering closely to a flange (620) on the other side surface of the third flange (600) and mounted by the first coupling member (500), wherein the valve housing (100), the second flange (400), the fourth flange (700) are formed of a nonmetallic material for corrosion prevention, thereby including a corrosion preventing function. Therefore, corrosion resistance can be improved and the weight can be reduced.

Description

HDPE BODY 버터플라이밸브 { HDPE BODY Butterfly valve }HDPE BODY Butterfly valve { HDPE BODY Butterfly valve }

본 발명은 경량플랜지와 비금속 몸체를 구비한 HDPE BODY 버터플라이밸브에 관한 것으로서, 보다 상세하게는 부식방지 재질인 고밀도 폴리에틸렌(high density polyethylene, HDPE)재질의 밸브 몸체와, 고밀도폴리에틸렌(HDPE) 재질의 플랜지 일측에 강재(鋼材)의 변형방지용 플랜지를 일체화시킨 버터플라이 밸브로서, 상기 밸브 양측 변형방지용 플랜지중 하나는 밸브시이트와 일체형으로 형성하여 경량화된 플랜지와 비금속 몸체를 구비한 HDPE BODY 버터플라이밸브에 관한 것이다.The present invention relates to a HDPE body butterfly valve having a lightweight flange and a non-metallic body, and more particularly, to a valve body made of high density polyethylene (HDPE), which is a corrosion-resistant material, and a valve body made of high density polyethylene (HDPE). A butterfly valve in which a steel anti-deformation flange is integrated on one side of the flange, and one of the anti-deformation flanges on both sides of the valve is formed integrally with the valve seat to form a lightweight flange and an HDPE BODY butterfly valve having a non-metallic body. it's about

버터플라이밸브는 각종 산업용수, 오일 등의 유체를 이송시키는 관로에 설치되어 유체의 흐름을 제어하는 밸브로서, 관로를 이루는 파이프라인에 연결되어 유체를 통과시키는 밸브바디와, 상기 밸브바디의 내부에 설치되며, 구동축에 의해 회전하여 밸브바디가 제공하는 통로를 개폐하는 디스크로 구성되어 있다. A butterfly valve is a valve installed in a pipeline for transporting fluids such as various industrial water and oil to control the flow of fluid. It is installed and consists of a disk that rotates by the drive shaft to open and close the passage provided by the valve body.

도면 1에는 도시된 종래기술의 버터플라이밸브는, 밸브 몸체부(10)은 강도가 높은 합성수지재로 버터플라이밸브를 성형함에 따라 사이즈가 큰 버터플라이밸브를 효과적으로 제작할 수 있고, 수돗물 등의 유체를 이송시키는 경우에도 내부식성을 유지할 수 있는 장점을 갖고 있고, 비금속 버터플라이밸브는 내식성과 경량화가 가장 큰 장점이나, 상수도관과 연결되는 플랜지부(20, 30)가 금속재질로 형성되어 철의 비중은 7.85이고, 고밀도 폴리에틸렌의 비중은 0.941~0.965임으로 플랜지부가 밸브의 몸체보다 더 무거워 경량화 필요성이 있다.In the prior art butterfly valve shown in FIG. 1, the valve body 10 can effectively manufacture a large-sized butterfly valve by molding the butterfly valve with a synthetic resin material having high strength, It has the advantage of maintaining corrosion resistance even when transported, and the non-metallic butterfly valve has the greatest advantage of corrosion resistance and light weight, but the flange parts 20 and 30 connected to the water supply pipe are formed of metal, so the specific gravity of iron is 7.85, and the specific gravity of high-density polyethylene is 0.941 to 0.965, so the flange portion is heavier than the body of the valve, so there is a need for weight reduction.

또한, 밸브의 몸체를 양 플랜지 사이에 고정시키기 위한 고정장치(50)는 가이드 하우징(51)의 양측에 각각 나사 결합된 제1,2 볼트의 나사산(SC; 52)은 서로 반대 방향으로 형성되어, 각형으로 형성된 가이드 하우징(51)을 이용하여 수동으로 조립하여 가이드 하우징(51)에 가해지는 조립토크 조절은 어려움이 있다. In addition, in the fixing device 50 for fixing the body of the valve between the two flanges, the threads (SC; 52) of the first and second bolts screwed on both sides of the guide housing 51 are formed in opposite directions to each other , It is difficult to adjust the assembly torque applied to the guide housing 51 by assembling manually using the guide housing 51 formed in a prismatic shape.

또한, 전술한 버터플라이밸브는 밸브 하우징 내부를 통과하는 유체 압력에 하우징 본체가 내구성을 갖도록 하우징 본체에 형성되는 키이홈(keyway)과 결합홈에 대응되는 키이(key)와 고정클립을 결합시켜 고정하였으나 키이 및 고정클립의 강도가 충분하지 못해 내구성이 떨어지게 된다.In addition, the above-described butterfly valve is fixed by combining a keyway formed on the housing body, a key corresponding to the coupling groove, and a fixing clip so that the housing body has durability against the fluid pressure passing through the inside of the valve housing However, the strength of the key and the fixing clip is not sufficient, resulting in poor durability.

또한, 하우징 본체에는 구동축이 삽입되는 구동축 지지부와 보조축 지지부를 결합되도록 제1,2 관통홀이 형성되고, 구동축 지지부와 보조축 지지부는 서로 마주하는 방향으로 제1,2 관통홀를 통해서 하우징 본체의 외측에서 내측으로 관통 결합되었으나, 하우징 본체의 제1,2 관통홀과 결합된 구동축 지지부와 보조축 지지부는 구동축의 작동에 의하여 누수가 발생되는 문제점이 있다.In addition, first and second through holes are formed in the housing body to couple the drive shaft support portion into which the drive shaft is inserted and the auxiliary shaft support portion, and the drive shaft support portion and the auxiliary shaft support portion pass through the first and second through holes in directions facing each other. Although through-coupled from the outside to the inside, there is a problem in that leakage occurs due to the operation of the drive shaft in the drive shaft support and auxiliary shaft support coupled to the first and second through holes of the housing body.

한국 등록특허공보 제10-1998860호Korean Registered Patent Publication No. 10-1998860 한국 등록특허공보 제10-1678171호Korean Patent Registration No. 10-1678171 한국 등록특허공보 제10-2316746호Korean Registered Patent Publication No. 10-2316746 한국 등록특허공보 제10-2165195호Korean Registered Patent Publication No. 10-2165195

따라서 본 발명은 전술한 바와 같은 종래기술의 문제점을 해결하기 위해 안출된 것으로 양측 상수도관과 결합시키기 위한 플랜지 일부와 구동축 지지부와 보조축 지지부가 일체로 형성되는 밸브 바디는 고밀도폴리에틸렌(HDPE) 재질로 이루어지고, 밸브디스크와 밸브디스크를 회전가능하게 구동부는 강재로 하여 경량화된 플랜지와 비금속 몸체를 구비한 HDPE BODY 버터플라이밸브를 제공하는데 있다.Therefore, the present invention has been made to solve the problems of the prior art as described above, and the valve body in which a part of the flange, the drive shaft support and the auxiliary shaft support are integrally formed for coupling with both water supply pipes is made of high density polyethylene (HDPE). To provide an HDPE BODY butterfly valve having a weighted flange and a non-metallic body by making the valve disc and the driving part rotatable with the valve disc made of steel.

상술한 목적을 달성하기 위한 본 발명은 내부에 유로가 형성되고, 양단이 개방되게 형성된 밸브 하우징(100)과, 상기 밸브 하우징에 회전가능하게 내설되고, 회전시 상기 유로를 개폐시키는 밸브 디스크(200)와, 상기 밸브 하우징(100)을 반경방향으로 관통하여 상기 밸브 디스크(200)의 축받이부(210, 220)에 고정되고, 상기 밸브 디스크(200)를 회전가능하게 지지하는 구동축(230) 및 보조축(240)과, 상기 밸브 하우징(100)의 일측면 플랜지(110)에 밀착되는 제1플랜지(300)와, 상기 제1플랜지(300) 일측면 플랜지(310)에 밀착되는 제2플랜지(400)가 제1체결부재(500)에 의해 장착된다.The present invention for achieving the above object is a valve housing 100 in which a flow path is formed and both ends are open, and a valve disc 200 rotatably installed in the valve housing and opening and closing the flow path during rotation. ) And a driving shaft 230 that passes through the valve housing 100 in the radial direction and is fixed to the bearing portions 210 and 220 of the valve disk 200 and rotatably supports the valve disk 200, and A first flange 300 in close contact with the auxiliary shaft 240, one side flange 110 of the valve housing 100, and a second flange in close contact with the one side flange 310 of the first flange 300 (400) is mounted by the first fastening member (500).

또한, 상기 밸브 하우징(100)의 타측면 플랜지(120)에 밀착되며, 밸브 디스크(200)의 디스크 시이트(250) 단부가 면접촉되어 실링되는 밸브시이트(610)가 일체형으로 연장 형성되는 제3플랜지(600)와, 상기 제3플랜지(600) 타측면 플랜지(620)에 밀착되는 제4플랜지(700)가 제1체결부재(500)에 의해 장착되며, 상기 밸브 하우징(100)과, 제2플랜지(400), 제4플랜지(700)를 부식방지용 비금속재로 형성하여 부식 방지기능을 구비한 것을 특징으로 하는 경량화된 플랜지와 비금속 몸체를 구비한 버터플라이 밸브로 한다.In addition, the third valve seat 610 is in close contact with the flange 120 on the other side of the valve housing 100, and the end of the disk seat 250 of the valve disk 200 is in surface contact and sealed. The flange 600 and the fourth flange 700 in close contact with the other side flange 620 of the third flange 600 are mounted by the first fastening member 500, and the valve housing 100 and the The second flange 400 and the fourth flange 700 are formed of a non-metal material for corrosion prevention to provide a butterfly valve with a lightweight flange and a non-metal body, characterized in that they have a corrosion prevention function.

이를 더욱 상세하게 설명하면, 상기 제2플랜지(400) 및 제4플랜지(700)에는To explain this in more detail, the second flange 400 and the fourth flange 700

제1동심원에 일정한 간격으로 제1체결부재(500)가 삽입되는 제1 체결공(410,710)이 형성되고, 상기 제2플랜지(400) 및 제4플랜지(700)의 외측면(430,730)에는 제1체결부재의 평와셔(520), 체결볼트(530)가 삽입되어 체결될 수 있는 깊이로 제1 체결공(410,710)의 직경(￠ 1)보다 직경이 큰 직경(￠ 2)을 가진 동심원으로 형성된 볼트삽입홀(430,730)이 형성된다.First fastening holes 410 and 710 into which the first fastening member 500 is inserted are formed at regular intervals in the first concentric circle, and on the outer surfaces 430 and 730 of the second flange 400 and the fourth flange 700, the first fastening holes 410 and 710 are formed. In a concentric circle having a larger diameter (￠ 2) than the diameter (￠ 1) of the first fastening hole (410,710) at a depth at which the flat washer 520 and the fastening bolt 530 of one fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 are formed.

또한, 상기 제1체결부재(500)는 양단에 오른나사의 암나사부로 이루어진 지지부(510))와, 평와셔(520), 지지부(510))의 암나사부에 결합되는 체결볼트(530)로 이루어지며, 상기 제1체결부재(500)에 의해 제2플랜지(400), 제1플랜지(300), 밸브 하우징(100), 제3플랜지(600), 제4플랜지(700)를 체결된 후에 제2플랜지(400)와 제4플랜지(700)의 볼트삽입홀(430,730)은 부식방지용 비금속재로 용접메꿈하여 제1체결부재의 지지부(510)와 체결된 체결볼트(530)를 제2플랜지(400) 및 제4플랜지(700) 내부에 고정시키는 인서트(insert)화 하여 풀림을 방지한다.In addition, the first fastening member 500 is composed of a support part 510 made of female screw parts of a right-hand screw at both ends, a flat washer 520, and a fastening bolt 530 coupled to the female screw part of the support part 510. After the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 are fastened by the first fastening member 500, The bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 are welded and filled with a non-metallic material for corrosion protection, and the fastening bolt 530 fastened to the support part 510 of the first fastening member is connected to the second flange ( 400) and the fourth flange 700 are fixed to the inside to prevent loosening.

또한, 상기 제2플랜지(400) 및 제4플랜지(700)는 볼트삽입홀(430,730)을 부식방지용 비금속재로 용접메꿈 후에 플랜지 개스킷 시트면을 가공하며, 상기 볼트삽입홀(430,730)의 용접메꿈된 면이 개스킷 시트면에 포함되도록 형성한다.In addition, in the second flange 400 and the fourth flange 700, the bolt insertion holes 430 and 730 are welded and filled with a non-metallic material for corrosion protection, and then the flange gasket seat surface is processed, and the bolt insertion holes 430 and 730 are welded and filled. formed to be included in the gasket seat surface.

또한, 상기 제1플랜지(300)와 제2플랜지(400)가 결합된 플랜지두께(t)는 KS B 2333호에 규정된 GS(Gray Iron Casting) 재질의 두께에 적용하되, 제1플랜지(300)의 두께(t1)를 플랜지두께(t)의 1/3 이하로 한다.In addition, the flange thickness (t) in which the first flange 300 and the second flange 400 are combined is applied to the thickness of the GS (Gray Iron Casting) material specified in KS B 2333, but the first flange 300 ) to make the thickness (t1) less than 1/3 of the flange thickness (t).

또한, 상기 밸브 하우징(100)의 구성인 밸브 하우징 몸체부(130), 구동축 지지부(140) 및 보조축 지지부(150)가 이음부 없이 하나의 몸체로 이루어지도록 밸브 하우징 몸체부(130)의 두께를 가진 판재를 가공하여 형성한다.In addition, the valve housing body portion 130, the drive shaft support portion 140, and the auxiliary shaft support portion 150, which are components of the valve housing 100, are made of one body without joints, so that the thickness of the valve housing body portion 130 It is formed by processing a plate with

본 발명의 밸브 바디와 밸브 플랜지의 일부분을 고밀도폴리에틸렌(HDPE) 재질로 이루어짐에 따라 내부식성과 경량화 시킬 수 있는 장점이 있다.As parts of the valve body and valve flange of the present invention are made of high-density polyethylene (HDPE) material, there is an advantage in that corrosion resistance and light weight can be achieved.

또한, 밸브의 몸체를 양 플랜지 사이에 고정시키기 위한 체결부재는 하부면은 밸브몸체와 접촉될 수 있는 평면을 구비한 다각형 몸체 양단에 오른나사의 암나사부로 이루어진 지지부(510)와, 고밀도폴리에틸렌(HDPE) 재질 플랜지 내부에 볼트삽입홀을 형성되어 체결볼트로 상기 지지부(510)의 암나사부에 체결 후에 상기 볼트삽입홀을 용접메꿈하여 체결볼트를 플랜지에 인서트(insert)화 되어 풀림을 방지할 수 있다.In addition, the fastening member for fixing the valve body between the two flanges includes a support portion 510 formed of right-hand female screw parts at both ends of a polygonal body having a flat surface capable of contacting the valve body, and high-density polyethylene (HDPE). ) A bolt insertion hole is formed inside the material flange, and after fastening to the female thread of the support part 510 with a fastening bolt, the bolt insertion hole is welded to fill the fastening bolt to be inserted into the flange to prevent loosening. .

또한, 조립된 몸체부 양측 외측에 형성된 볼트삽입홀에 체결볼트를 자동화 기계로 균일한 토크(torque)로 조립할 수 있어 조립되는 플랜지들과 밸브 하우징에 작용하는 압력을 균일하게 조절할 수 있어 밸브 내부 수압에 대해 내구성을 증대시킬 수 있는 장점이 있다.In addition, since the fastening bolts can be assembled with a uniform torque in the bolt insertion holes formed on the outer sides of both sides of the assembled body, the pressure acting on the flanges and the valve housing to be assembled can be uniformly adjusted, so that the water pressure inside the valve can be adjusted evenly. It has the advantage of increasing durability.

또한, 플랜지의 볼트삽입홀을 부식방지용 비금속재로 용접메꿈한 후에, 플랜지 개스킷 시트면을 가공하며, 상기 볼트삽입홀의 용접메꿈된 면이 개스킷 시트면에 포함되어 플랜지와 밸브 하우징의 접촉부의 누설을 방지하고 플랜지에 가해지는 모멘트를 감소시킬 수 있는 장점이 있다.In addition, after welding the bolt insertion hole of the flange with a non-metallic material for corrosion protection, the flange gasket seat surface is processed, and the weld-filled surface of the bolt insertion hole is included in the gasket seat surface to prevent leakage of the contact portion between the flange and the valve housing. It has the advantage of being able to prevent and reduce the moment applied to the flange.

또한, 하우징 본체에 구동축이 삽입되는 구동축 지지부와 보조축 지지부를 일체로 형성함에 따라 조립부의 누설과 밸브 개폐 구동부의 하중에 의한 고밀도폴리에틸렌(HDPE) 재질의 밸브 바디의 변형을 방지할 수 있다.In addition, since the drive shaft support portion and the auxiliary shaft support portion into which the drive shaft is inserted into the housing body are integrally formed, leakage of the assembly unit and deformation of the valve body made of high density polyethylene (HDPE) due to the load of the valve opening/closing driving unit can be prevented.

도 1은 본 발명의 종래기술의 비금속 버터플라이 밸브를 나타낸 도면.
도 2는 본 발명에 따른 경량플랜지를 구비한 버터플라이 밸브를 나타낸 사시도(닫힌상태).
도 3은 본 발명에 따른 경량플랜지를 구비한 버터플라이 밸브를 나타낸 사시도(열린상태).
도 4는 본 발명에 따른 경량플랜지를 구비한 버터플라이 밸브를 나타낸 분해사시도.
도 5는 본 발명에 따른 고밀도폴리에틸렌(HDPE) 재질의 플랜지 단면도와 요부확대도.
도 6은 본 발명에 따른 경량플랜지가 조립된 밸브 몸체를 나타낸 도면.
도 7은 도 6의 경량플랜지가 조립된 밸브 몸체 단면 요부확대도.1 is a view showing a non-metallic butterfly valve of the prior art of the present invention.
Figure 2 is a perspective view showing a butterfly valve having a lightweight flange according to the present invention (closed state).
Figure 3 is a perspective view (open state) showing a butterfly valve having a lightweight flange according to the present invention.
Figure 4 is an exploded perspective view showing a butterfly valve having a lightweight flange according to the present invention.
5 is a cross-sectional view of a flange made of high-density polyethylene (HDPE) and an enlarged view of a main part according to the present invention.
6 is a view showing a valve body assembled with a lightweight flange according to the present invention.
7 is an enlarged view of a main portion of a valve body in which the lightweight flange of FIG. 6 is assembled;

본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술 되어 있는 실시 예들을 참조하면 명확해질 것이다. 그러나 본 발명은 이하에서 개시되는 실시 예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 발명의 실시 예들은 본 발명의 개시가 완전하도록 하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 기재에 의해 정의된다.Advantages and features of the present invention, and methods for achieving them will become clear with reference to the detailed embodiments described below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the embodiments of the present invention make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is defined by the description of the claims.

한편, 본 명세서에서 사용된 용어는 실시 예들을 설명하기 위한 것이며 본 발명을 제한하고자 하는 것은 아니다.Meanwhile, terms used in this specification are for describing embodiments and are not intended to limit the present invention.

본 명세서에서, 단수형은 문구에서 특별히 언급하지 않는 한 복수형도 포함한다. 명세서에서 사용되는 "포함한다(comprises)" 및/또는 "포함하는(comprising)"은 언급된 구성소자, 단계, 동작 및/또는 소자에 하나 이상의 다른 구성소자, 단계, 동작 및/또는 소자의 존재 또는 추가함을 배제하지 않는다. 이하, 첨부된 도면을 참조하여 본 발명의 실시예에 따른 경량플랜지를 구비한 버터플라이 밸브를 상세히 설명하기로 한다.In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, “comprises” and/or “comprising” means the presence of one or more other components, steps, operations, and/or elements in the stated component, step, operation, and/or element. or adding Hereinafter, a butterfly valve having a lightweight flange according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2 내지 도 7을 참조하면, 본 명세서의 일 실시예에 따른 경량플랜지를 구비한 버터플라이 밸브(A)는 내부에 원통형태의 유로가 형성되고, 양단이 개방되게 형성되며, 부식방지용 비금속재로 형성되는 밸브 하우징(100), 액츄에이터(미도시) 구동에 의해 밸브 하우징(100)에 90각도 내에서 회전가능하게 내설되고, 회전시 유로를 개폐시키는 밸브 디스크(valve disc; 200), 밸브 디스크(200)의 축받이부(210, 220)에 고정되고, 상기 밸브 디스크(200)를 회전가능하게 지지하는 구동축(230) 및 보조축(240), 상기 밸브 하우징(100)의 일측면 플랜지(110)에 밀착되는 제1플랜지(300)와, 상기 제1플랜지(300) 일측면 플랜지(310)에 밀착되는 제2플랜지(400)가 제1체결부재(500)에 의해 장착되고, 상기 밸브 하우징(100)의 타측면 플랜지(120)에 밀착되며, 밸브 디스크(200)의 디스크 시이트(250) 단부가 면접촉되어 실링되는 밸브시이트(610)가 일체형으로 연장 형성되는 제3플랜지(600)와, 상기 제3플랜지(600) 타측면 플랜지(620)에 밀착되는 제4플랜지(700)가 제1체결부재(500)에 의해 장착되며, 상기 밸브 하우징(100)과, 제2플랜지(400), 제4플랜지(700)를 부식방지용 비금속재로 형성하여 부식 방지기능을 구비한 것을 특징으로 한다.2 to 7, the butterfly valve (A) having a lightweight flange according to an embodiment of the present specification has a cylindrical flow path formed therein, both ends are open, and a non-metallic material for preventing corrosion. A valve housing 100 formed of, a valve disc 200 rotatably installed inside the valve housing 100 within 90 degrees by driving an actuator (not shown), and opening and closing the flow path during rotation, the valve disc A driving shaft 230 and an auxiliary shaft 240 fixed to the bearing parts 210 and 220 of the 200 and rotatably supporting the valve disc 200, and a flange 110 on one side of the valve housing 100. A first flange 300 in close contact with the first flange 300 and a second flange 400 in close contact with the flange 310 on one side of the first flange 300 are mounted by the first fastening member 500, and the valve housing The third flange 600 in which the valve seat 610, which is in close contact with the other side flange 120 of the 100 and is sealed by surface contact of the end of the disk seat 250 of the valve disk 200, extends integrally with the third flange 600 The fourth flange 700 in close contact with the third flange 600 and the other side flange 620 is mounted by the first fastening member 500, and the valve housing 100 and the second flange 400 , It is characterized in that the fourth flange 700 is formed of a non-metallic material for corrosion prevention to have a corrosion prevention function.

상기 비금속재는 고밀도폴리에틸렌(HDPE) 재질로 하며, 상기 제1체결부재(500)는 하부면을 밸브몸체와 접촉되어 회전할 수 없도록, 하면이 평면으로 형성한 다각형 몸체 양단에 오른나사의 암나사부로 이루어진 지지부(510)와, 평와셔(520), 상기 지지부(510)의 암나사부에 결합되는 체결볼트(530)로 이루어져 있다.The non-metallic material is made of high-density polyethylene (HDPE), and the first fastening member 500 is composed of right-hand female screw parts at both ends of a polygonal body having a flat lower surface so that the lower surface cannot rotate in contact with the valve body. It consists of a support part 510, a flat washer 520, and a fastening bolt 530 coupled to the female screw part of the support part 510.

상기 체결볼트(530)는 육각구멍붙이 볼트, 육각머리볼트, 작은 나사등에서 선택하여 사용할 수 있다.The fastening bolt 530 may be selected from a hexagon socket head bolt, a hexagon head bolt, and a small screw.

여기서, 상기 제2플랜지(400) 및 제4플랜지(700)는 외경(D)과 두께(t2)을 가진 원반형으로 형성되고, 제1동심원(C1)에 일정한 간격으로 제1체결부재(500)의 암나사부에 삽입 체결되는 체결볼트(530)의 나사부가 삽입되는 제1 체결공(410,710)이 ￠1의 직경으로 형성되고, 상기 제2플랜지(400) 및 제4플랜지(700)의 외측면(430,730)에는 제1체결부재의 평와셔(520), 체결볼트(530)가 삽입되어 체결될 수 있는 깊이(dp)로 제1 체결공(410,710)의 직경(￠ 1)과 동심원으로 직경(￠ 1) 보다 직경이 큰 직경(￠ 2)으로 형성된 볼트삽입홀(430,730)이 형성되어 있다.Here, the second flange 400 and the fourth flange 700 are formed in a disk shape having an outer diameter D and a thickness t2, and the first fastening member 500 is formed at regular intervals in the first concentric circle C1. The first fastening holes 410 and 710 into which the threaded portion of the fastening bolt 530 is inserted into the female threaded portion of is formed with a diameter of ￠1, and the outer surfaces of the second flange 400 and the fourth flange 700. (430,730) has a diameter (￠ 1) concentric with the diameter (￠ 1) of the first fastening hole (430,730) at a depth (dp) at which the flat washer 520 and the fastening bolt 530 of the first fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 formed with a larger diameter (￠ 2) than ￠ 1) are formed.

상기 밸브 하우징(100)을 중심으로 일측에 제1플랜지(300), 제2플랜지(400), 타측으로 제3플랜지(600), 제4플랜지(700)를 조립한 후에 상기 제1체결부재의 지지부(510)는 밸브 하우징(100)의 외측에 구비되고, 상기 하우징(100)의 일측에는 제2플랜지(400), 상기 하우징(100)의 타측에는 제1플랜지(300), 제3플랜지(600)를 밀착한 후에 제2플랜지(400) 및 제4플랜지(700)에 형성된 볼트삽입홀(430,730) 내에서 각각 평와셔(520)를 삽입하고 체결볼트(530)로 체결된다.After assembling the first flange 300 and the second flange 400 on one side of the valve housing 100 and the third flange 600 and the fourth flange 700 on the other side, The support part 510 is provided on the outside of the valve housing 100, and the second flange 400 is provided on one side of the housing 100, and the first flange 300 and the third flange are on the other side of the housing 100 ( 600), the flat washers 520 are inserted into the bolt insertion holes 430 and 730 formed in the second flange 400 and the fourth flange 700, respectively, and fastened with fastening bolts 530.

이와 같이 몸체부 외측에 지지부(510)가 구비된 상태에서 조립된 밸브 몸체 양측 외측에 구비된 볼트삽입홀(430,730)에 체결볼트(530)로 체결함에 따라 자동화 기계를 사용할 수 있고, 또한, 몸체부 외측의 지지부(510)는 별도의 고정장치 또는 도구가 필요 없이 자동화 기계로 지지부(510)에 체결되는 체결볼트(530)에 가해지는 토크(torque)를 균일하게 조절할 수 있어 조립되는 플랜지들과 밸브 하우징(100)에 작용하는 압력을 균일하게 조절할 수 있어 밸브 내부 수압에 대해 내구성을 증대시키는 효과를 갖게 된다.In this way, in a state where the support part 510 is provided on the outside of the body part, an automated machine can be used by fastening with the fastening bolt 530 to the bolt insertion holes 430 and 730 provided on the outside of both sides of the assembled valve body. The support part 510 outside the part can uniformly adjust the torque applied to the fastening bolt 530 fastened to the support part 510 by an automated machine without the need for a separate fixing device or tool, so that the assembled flanges and Since the pressure acting on the valve housing 100 can be uniformly adjusted, it has an effect of increasing durability against water pressure inside the valve.

또한, 제1체결부재(500)에 의해 제2플랜지(400), 제1플랜지(300), 밸브 하우징(100), 제3플랜지(600), 제4플랜지(700)를 체결하는 밸브 몸체부 조립이 완료되면, 밸브 몸체부는 내압실험으로 누설여부를 확인할 수 있고, 누설이 없음을 확인된 밸브 몸체부의 제2플랜지(400)와 제4플랜지(700)의 볼트삽입홀(430,730)은 부식방지용 비금속재로 용접메꿈하여, 비금속재 용접에 의해 제1체결부재의 지지부(510)와 체결된 체결볼트(530)를 제2플랜지(400) 및 제4플랜지(700) 내부에 고정시키는 인서트(insert)화 되어 풀림을 방지한다.In addition, the valve body portion fastening the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 by the first fastening member 500. When the assembly is completed, the valve body part can be checked for leakage through an internal pressure test, and the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 of the valve body part where no leakage is confirmed are for corrosion prevention. An insert for fixing the fastening bolt 530 fastened to the support 510 of the first fastening member by welding a non-metallic material to the inside of the second flange 400 and the fourth flange 700 ) to prevent loosening.

상기와 같이 조립되고, 볼트삽입홀(430,730)이 부식방지용 비금속재로 용접메꿈된 밸브 몸체부는 공업표준규격인 KS B 2333호(버터플라이 밸브) 규정에 적합하도록 면간치수(L)와 플랜지의 바깥지름(D), 가스켓시트 바깥지름(g), 볼트구멍의 중심원 지름(c), 가스켓시트 높이(f) 에 적합하도록 가공부(A)을 가공한다.The valve body assembled as described above and the bolt insertion holes 430 and 730 welded and filled with a non-metallic material for corrosion protection has an inter-face dimension (L) and the outside of the flange to conform to the industrial standard KS B 2333 (butterfly valve) regulation The processing part (A) is machined to suit the diameter (D), gasket sheet outer diameter (g), bolt hole center circle diameter (c), and gasket sheet height (f).

이와 같이 가공시에는 제2플랜지(400)와 제4플랜지(700)의 볼트삽입홀(430,730)을 부식방지용 비금속재로 용접메꿈한 후에, 볼트삽입홀(430,730)의 용접메꿈된 면이 개스킷 시트면에 포함될 수 있도록 제1동심원(C1)이 설계되고, 제2플랜지(400)와 제4플랜지(700)의 플랜지 개스킷 시트면을 가공하며, 상기 볼트삽입홀(430,730)의 용접메꿈된 면이 개스킷 시트면에 포함되도록 형성한다.In this way, after filling the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 with a non-metallic material for corrosion prevention, the weld-filled surfaces of the bolt insertion holes 430 and 730 are gasket sheets. A first concentric circle (C1) is designed to be included in the surface, the flange gasket seat surfaces of the second flange 400 and the fourth flange 700 are processed, and the weld-filled surfaces of the bolt insertion holes 430 and 730 are It is formed to be included in the gasket seat surface.

또한, 버터플라이 밸브에 대한 공업표준규격인 KS B 2333호에는 버터플라이 밸브의 호환 등을 위해 밸브의 면간거리, 플랜지의 직경, 두께, 개스킷 시트 바깥지름 등의 모양 및 치수가 규정되어 있다.In addition, KS B 2333, an industrial standard for butterfly valves, specifies the shape and dimensions of the valve's face-to-face distance, flange diameter, thickness, gasket sheet outer diameter, etc. for compatibility with the butterfly valve.

비금속 밸브 하우징을 조립하는 버터플라이 밸브에서는 밸브 하우징 외경 가까이 제1체결부재가 위치하여야 플랜지와 밸브 하우징의 접촉부의 누설을 방지하고 플랜지에 가해지는 모멘트를 감소할 수 있다.In a butterfly valve assembling a non-metallic valve housing, the first fastening member should be located close to the outer diameter of the valve housing to prevent leakage of the contact portion between the flange and the valve housing and to reduce the moment applied to the flange.

그러나 밸브 하우징 외경 가까이 제1체결부재가 위치하게 되면, 플랜지에 제1체결부재가 삽입되는 관통공이 개스킷 시트 바깥지름 내측에 위치되는 문제점이 있었으나, 본원 발명에서는 상기 와 같이 몸체부 외측에 지지부(510)가 밀착될 수 있도록 조립할 수 있고, 제2플랜지(400)와 제4플랜지(700)의 볼트삽입홀(430,730)을 부식방지용 비금속재로 용접메꿈한 후에, 제2플랜지(400)와 제4플랜지(700)의 플랜지 개스킷 시트면을 가공하며, 상기 볼트삽입홀(430,730)의 용접메꿈된 면이 개스킷 시트면에 포함되도록 형성한다. However, when the first fastening member is located close to the outer diameter of the valve housing, there is a problem that the through hole into which the first fastening member is inserted into the flange is located inside the outer diameter of the gasket sheet. ) can be assembled so that the second flange 400 and the fourth flange 700 can be assembled, and after filling the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 by welding with a non-metallic material for corrosion protection, the second flange 400 and the fourth The flange gasket seat surface of the flange 700 is processed, and the weld-filled surfaces of the bolt insertion holes 430 and 730 are formed to be included in the gasket seat surface.

또한 본원 밸브와 연결되는 제1,2상수도관(10,20)의 플랜지(11,21) 사이에 제1체결부재(500)에 의해 체결시킨 버터플라이 밸브의 제2플랜지(400)와 제4플랜지(700)를 밀착시키며 삽입시켜 조립한다.In addition, the second flange 400 and the fourth flange 400 of the butterfly valve fastened by the first fastening member 500 between the flanges 11 and 21 of the first and second water pipes 10 and 20 connected to the valve of the present application. Assemble by inserting the flange 700 into close contact.

제1,2상수도관(10,20)의 플랜지(11,21)와 버터플라이 밸브의 제2플랜지(400)와 제4플랜지(700)를 밀착시킨 상태에서, 제2플랜지(400)와 밀착한 제1플랜지(300), 제3플랜지(600)와 밀착한 제4플랜지(700)에 형성된 제3,4체결공(440,740)에 결합되는 다수의 제2체결부재(800)에 의해 체결함에 따라 버터플라이 밸브와 제1상수도관(10)과 제2상수도관(20)을 이음 연결할 수 있다.In a state where the flanges 11 and 21 of the first and second water pipes 10 and 20 and the second flange 400 and the fourth flange 700 of the butterfly valve are in close contact with the second flange 400 It is fastened by a plurality of second fastening members 800 coupled to the third and fourth fastening holes 440 and 740 formed in the fourth flange 700 in close contact with the first flange 300 and the third flange 600. Accordingly, the butterfly valve, the first water supply pipe 10, and the second water supply pipe 20 may be jointly connected.

이와 같이 제1,2상수도관(10,20)이음 연결 시에 볼트 또는 너트에 의한 손상을 방지하기 위하여 체결되는 제1플랜지(300)와 제3플랜지(600)는 강재(금속재질)로 형성되면 강재의 제1플랜지(300)와 비금속 재질로 이루어진 제2플랜지(400)가 결합된 플랜지의 총 두께(t)는 공업표준규격인 KS B 2333호에 규정된 GS(Gray Iron Casting) 재질의 두께에 적용하되, 강재로 이루어진 제1플랜지(300)와 제3플랜지(600)의 두께(t1)를 플랜지 총 두께(t)의 1/3 이하로 하여 경량화 된 플랜지를 갖게 된다.In this way, the first flange 300 and the third flange 600, which are fastened to prevent damage caused by bolts or nuts when connecting the first and second water pipes 10 and 20, are formed of steel (metal material). When the first flange 300 of steel and the second flange 400 made of non-metallic material are combined, the total thickness (t) of the flange is made of GS (Gray Iron Casting) specified in KS B 2333, an industrial standard. It is applied to the thickness, but the thickness (t1) of the first flange 300 and the third flange 600 made of steel is made less than 1/3 of the total thickness (t) of the flange to have a lightweight flange.

이상 본 발명을 구체적인 실시 예를 통하여 상세히 설명하였으나, 이는 본 발명을 구체적으로 설명하기 위한 것으로, 본 발명은 이에 한정되지 않으며, 본 발명의 기술적 사상 내에서 당 분야의 통상의 지식을 가진 자에 의해 그 변형이나 개량이 가능함이 명백하다.Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible.

본 발명의 단순한 변형 내지 변경은 모두 본 발명의 범주에 속하는 것으로 본 발명의 구체적인 보호 범위는 첨부된 특허청구범위에 의해 명확해질 것이다.All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100 : 밸브 하우징 200 : 밸브디스크
210 : 축받이부 230 : 구동축
300 : 제1플랜지 400 : 제2플랜지
500 : 제1체결부재 510 : 제1체결부재의 지지부
520 : 평와셔 530 : 체결볼트
600 : 제3플랜지 610 : 밸브시이트
700 : 제4플랜지 710 : 제1 체결공
720 : 제4플랜지의 외측면 730 : 볼트삽입홀
t ; 플랜지두께 t1 : 제1플랜지 두께100: valve housing 200: valve disc
210: bearing part 230: drive shaft
300: first flange 400: second flange
500: first fastening member 510: support of the first fastening member
520: flat washer 530: fastening bolt
600: third flange 610: valve seat
700: 4th flange 710: 1st fastening hole
720: outer surface of the fourth flange 730: bolt insertion hole
t; Flange thickness t1: First flange thickness

Claims (4)

내부에 유로가 형성되고, 양단이 개방되게 형성된 밸브 하우징(100)과,
상기 밸브 하우징에 회전가능하게 내설되고, 회전시 상기 유로를 개폐시키는 밸브 디스크(200)와,
상기 밸브 하우징(100)을 반경방향으로 관통하여 상기 밸브 디스크(200)의 축받이부(210, 220)에 고정되고, 상기 밸브 디스크(200)를 회전가능하게 지지하는 구동축(230) 및 보조축(240)과,
상기 밸브 하우징(100)의 일측면 플랜지(110)에 밀착되는 제1플랜지(300)와,
상기 제1플랜지(300) 일측면 플랜지(310)에 밀착되는 제2플랜지(400)가 제1체결부재(500)에 의해 장착되고,
상기 밸브 하우징(100)의 타측면 플랜지(120)에 밀착되며, 밸브 디스크(200)의 디스크 시이트(250) 단부가 면접촉되어 실링되는 밸브시이트(610)가 일체형으로 연장 형성되는 제3플랜지(600)와,
상기 제3플랜지(600) 타측면 플랜지(620)에 밀착되는 제4플랜지(700)가 제1체결부재(500)에 의해 장착되며, 상기 밸브 하우징(100)과, 제2플랜지(400), 제4플랜지(700)를 고밀도폴리에틸렌(HDPE) 재질로 형성하여 경량화 및 부식 방지기능을 구비하고,
상기 제2플랜지(400) 및 제4플랜지(700)에는
제1동심원(c1)에 일정한 간격으로 체결볼트(530) 나사부가 삽입되는 제1 체결공(410,710)이 형성되고,
상기 제2플랜지(400) 및 제4플랜지(700)의 외측면(430,730)에는 제1체결부재의 평와셔(520), 체결볼트(530)가 삽입되어 체결될 수 있는 깊이로 제1 체결공(410,710)의 직경(￠ 1)보다 직경이 큰 직경(￠ 2)을 가진 동심원으로 형성된 볼트삽입홀(430,730)이 형성되고,
상기 제1체결부재(500)에 의해 제2플랜지(400), 제1플랜지(300), 밸브 하우징(100), 제3플랜지(600), 제4플랜지(700)를 체결된 후에 제2플랜지(400)와 제4플랜지(700)의 볼트삽입홀(430,730)은 부식방지용 비금속재로 용접메꿈하여 제1체결부재의 지지부(510)와 체결된 체결볼트(530)를 제2플랜지(400) 및 제4플랜지(700) 내부에 고정시키는 인서트(insert)화 하여 풀림을 방지하는 것을 특징으로 하는 HDPE BODY 버터플라이 밸브.A valve housing 100 having a flow path formed therein and opening both ends;
A valve disc 200 rotatably installed in the valve housing and opening and closing the passage when rotated;
Drive shaft 230 and auxiliary shaft ( 240) and,
A first flange 300 in close contact with the flange 110 on one side of the valve housing 100;
The second flange 400 in close contact with the one side flange 310 of the first flange 300 is mounted by the first fastening member 500,
A third flange in which the valve seat 610, which is in close contact with the flange 120 on the other side of the valve housing 100 and is sealed by surface contact of the end of the disk seat 250 of the valve disk 200, extends integrally ( 600) and,
The fourth flange 700 in close contact with the other side flange 620 of the third flange 600 is mounted by the first fastening member 500, the valve housing 100, the second flange 400, The fourth flange 700 is formed of high-density polyethylene (HDPE) material to have a light weight and anti-corrosion function,
The second flange 400 and the fourth flange 700
First fastening holes 410 and 710 into which the threaded part of the fastening bolt 530 is inserted are formed at regular intervals in the first concentric circle c1,
The outer surfaces 430 and 730 of the second flange 400 and the fourth flange 700 have first fastening holes at a depth at which the flat washers 520 and fastening bolts 530 of the first fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 formed as concentric circles having a diameter (￠ 2) larger than the diameter (￠ 1) of (410,710) are formed,
After the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 are fastened by the first fastening member 500, the second flange The bolt insertion holes 430 and 730 of the 400 and the fourth flange 700 are welded and filled with a non-metallic material for corrosion protection, and the fastening bolt 530 fastened to the support part 510 of the first fastening member is connected to the second flange 400. And the HDPE BODY butterfly valve characterized in that the fourth flange 700 is inserted to be fixed to the inside to prevent loosening. 제1항에 있어서,
상기 제1체결부재(500)는
하부면은 밸브몸체와 접촉될 수 있는 평면을 구비한 다각형 몸체 양단에 오른나사의 암나사부로 이루어진 지지부(510)와, 평와셔(520), 지지부(510)의 암나사부에 결합되는 체결볼트(530)로 이루어지는 것을 특징으로 하는 HDPE BODY 버터플라이 밸브.According to claim 1,
The first fastening member 500 is
The lower surface includes a support portion 510 composed of a female thread portion of a right-hand thread at both ends of a polygonal body having a plane capable of contacting the valve body, a flat washer 520, and a fastening bolt 530 coupled to the female thread portion of the support portion 510. ) HDPE BODY butterfly valve, characterized in that consisting of. 제1항에 있어서,
상기 제2플랜지(400) 및 제4플랜지(700)는
볼트삽입홀(430,730)을 부식방지용 비금속재로 용접메꿈 후에 플랜지 개스킷 시트면을 가공하며,
상기 볼트삽입홀(430,730)의 용접메꿈된 면이 개스킷 시트면에 포함되도록 형성된 것을 특징으로 하는 HDPE BODY 버터플라이 밸브.According to claim 1,
The second flange 400 and the fourth flange 700 are
After welding the bolt insertion holes 430 and 730 with a non-metallic material for corrosion protection, the flange gasket seat surface is processed,
The HDPE BODY butterfly valve, characterized in that the welded and filled surfaces of the bolt insertion holes (430, 730) are included in the gasket seat surface. 제3항에 있어서
상기 제1플랜지(300)와 제2플랜지(400)가 결합된 플랜지두께(t)는 KS B 2333호에 규정된 GS(Gray Iron Casting) 재질의 두께에 적용하되, 제1플랜지(300)의 두께(t1)를 플랜지두께(t)의 1/3 이하로 하는 것을 특징으로 하는 HDPE BODY 버터플라이 밸브.
According to claim 3
The flange thickness (t) in which the first flange 300 and the second flange 400 are combined is applied to the thickness of the GS (Gray Iron Casting) material specified in KS B 2333, but the first flange 300 HDPE BODY butterfly valve, characterized in that the thickness (t1) is less than 1/3 of the flange thickness (t).
KR1020220133656A 2022-10-18 2022-10-18 HDPE BODY Butterfly valve KR102527350B1 (en)

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KR101678171B1 (en) 2015-08-21 2016-11-21 주식회사 솔브 butterfly valve
KR101678170B1 (en) * 2016-06-28 2016-11-21 주식회사 솔브 Non-metallic valves for flooding
KR101998860B1 (en) 2018-12-13 2019-07-11 주식회사 솔브 Valves to Prevent Axial Bending
KR102165195B1 (en) 2020-07-08 2020-10-13 주식회사 솔브 butterfly valve having supporter drive shaft
JP2022056309A (en) * 2020-09-29 2022-04-08 積水化学工業株式会社 Diaphragm valve
KR102316746B1 (en) 2021-04-14 2021-10-26 신진정공 주식회사 butterfly valve with anti-corrosion intergrated valve seat and flange

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