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주철 글로브 밸브

주철 글로브 밸브는 강제 밀봉 밸브이므로 밸브가 닫힐 때 디스크에 압력을 가하여 밀봉 표면이 누출되지 않도록해야합니다. 매체가 디스크 아래에서 밸브로 들어갈 때 작동력이 극복해야하는 저항은 밸브 스템과 패킹의 마찰력과 매체의 압력에 의해 생성되는 추력입니다. 밸브를 닫는 힘은 밸브를 여는 힘보다 크므로 주철 글로브 밸브의 밸브 스템 직경이 커야합니다. 그렇지 않으면 밸브 스템이 구부러집니다.

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1. 소개주철G둥근 돌출부VAlve

주철g둥근 돌출부vAlve is a forced-sealing vAlve, so when the vAlve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the vAlve from below the disc, the resistance that the operating force needs to overcome is the friction force of the vAlve stem and packing and the thrust generated by the pressure of the medium. The force to close the vAlve is greater than the force to open the vAlve, so 주철The diameter of the vAlve stem of the g둥근 돌출부vAlve should be large, otherwise the vAlve stem will bend up failure.

주철G둥근 돌출부VAlve

2. Parameters of 주철G둥근 돌출부VAlve

Type of VAlve	주철g둥근 돌출부vAlve
DN	DN10ï½žDN600
PNï¼ˆMPaï¼ ‰	1.6ï½ž16Mpa
설계 온도 범위	-15â „ƒï½ž200â „ƒ
연결 타입:	플랜지
액추에이터 유형	수동 구동, 공압, 유압 또는 전기 액추에이터
적용 가능한 매체	물, 기름, 가스 및 각종 부식 매체

예비 부품	재료
바디 커버 디스크	단조 강, 주강
줄기	단조 강, 주강
포장	유연한 흑연, 향상된 유연한 흑연, PTEE
씰링 심	강화 된 Flexiblo 흑연, 스테인리스 강, PTFE

씰링면
13Cr,STL, PTFE, 나일론, 본체 재질 포함

3. Advantages of 주철g둥근 돌출부vAlve

1) The structure of the 주철g둥근 돌출부vAlve is simpler than that of the gate vAlve, and it is more convenient to manufacture and maintain.
2) 밀봉 표면of 주철g둥근 돌출부vAlve is not easy to wear and scratch, and the sealing performance is good. There is no relative sliding between the vAlve disc and the sealing surface of the vAlve body when opening and closing, so neither abrasion nor abrasion is serious. The sealing performance is good and the service life is long. .
3) When the 주철g둥근 돌출부vAlve is opened and closed, the disc stroke is small, so the height of the shut-off vAlve is smaller than that of the gate vAlve, but the structure length is longer than that of the gate vAlve.
4) 주철g둥근 돌출부vAlve has a large opening and closing moment, which is laborious and takes a long time.
5) The medium channel in the 주철g둥근 돌출부vAlve is tortuous, the fluid resistance is large, and the power consumption is large.
6) When the nominal pressure of the medium flow direction of the 주철g둥근 돌출부vAlve PN≤16MPa, the downstream flow is generally adopted, and the medium flows upward from the bottom of the vAlve flap; when the nominal pressure PN≥20MPa, the reverse flow is generally adopted, and the medium flows downward from the top of the vAlve flap. In order to increase the seal performance. When in use, the shut-off vAlve medium can only flow in one direction and cannot change the direction of flow.
7) The vAlve flap is often eroded when the 주철g둥근 돌출부vAlve is fully opened.

주철G둥근 돌출부VAlve
4. FAQ