그루브 밸브(Globe Valve)

그루브 밸브(Globe Valve)

 

1) 일반사항

• 유체의 통로를 수직으로 막아 차단하고, 유량제어용으로 사용되는 대표적인 밸브

- 밸브 바디에 유체의 방향이 표시되어 있으므로 이에 맞게 설치해야 한다.

• 장점 : 유량의 미세 조절이 가능하고, 고압에 용이하다.
• 단점 : 유체 흐름 형태가 S자로 되어 압력 손실이 크다. 와류현상 발생.

때문에 압에서는 부적합. 

동일 규격의 Gate valve에 비해 비싸다.

 

2) 종류

 

• T-Type

: severe throttling service

: control valve bypass

※ Tee Pattern Globe valve design is the most common body type, with a Z-shaped diaphragm. The horizontal setting of the seat allows the stem and disk to travel perpendicular to the horizontal line. This design has the lowest coefficient of flow and higher pressure drop. They are used in severe throttling services, such as in bypass lines around a control valve. Tee-pattern Globe valves may also be used in applications where pressure drop is not a concern and throttling is required.

 

• Y-Type

: Flow 저항을 최소화

※ Wye Pattern Globe valves design, is an alternative for the high pressure drop, inherent in Globe valves. Seat and stem are angled at approximately 45 degrees, what gives a straighter flowpath at full opening and offer the least resistance to flow. They can be cracked open for long periods without severe erosion. They are extensively used for throttling during seasonal or startup operations. They can be rod through to remove debris when used in drain lines that are normally closed.

 

• Angle-Type

: Pulsating flow

※ Angle Pattern Globe valves design is a modification of the basic Tee Pattern Globe valve. The ends of this Globe valve are at an angle of 90 degrees, and fluid flow occurs with a single 90 degrees turn. They have a slightly lower coefficient of flow than wye-pattern Globe valves. They are used in applications that have periods of pulsating flow because of their capability to handle the slugging effect of this type of flow.

 

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[STUDY/Valve] - 밸브의 구조(Structure of valve)

[STUDY/Valve] - 게이트 밸브(Gate Valve)

[STUDY/Valve] - 체크 밸브(Check Valve)

[STUDY/Valve] - 볼 밸브(Ball Valve)

[STUDY/Valve] - 버터플라이 밸브(Butterfly Valve)

[STUDY/Valve] - 기타 밸브(Diaphragm Valve, Plug Valve, Needle Valve)

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출처 : My Brain + Google Search + www.wermac.org