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大型大口径 Z43F-150C DN450 平板闸阀 天然气/油田/燃气法兰平板闸阀

大型大口径 Z43F-150C DN450 平板闸阀 天然气/油田/燃气法兰平板闸阀

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产品特色

大型大口径 Z43F-150C DN450 平板闸阀 天然气/油田/燃气法兰平板闸阀

Large large caliber Z43F - 150 - c DN450 flat gate valve and gas/oil/gas flange slab gate valves

平板闸阀适用场合

1. 石油、天然气输送管线。带导流孔的平板闸阀还便于清扫管线。

2. 成品油的输送管线和贮存设备。

3. 石油、天然气的开采井口装置，也就是采油树用阀。

4. 带有悬浮颗粒的介质的管道。

5. 城市煤气输送管线。

6. 自来水工程。

平板闸阀的优点

流阻小，不缩口的其流阻与短只管的流阻相仿。带导流孔的平板闸阀安装在管路上还可直接用清管器进行清管。由于闸板是在两阀座面上滑动，因此平板闸阀液能适用于带悬浮颗粒的介质、平板闸阀的密封面实际上是自动定位的。阀座密封面不会受到阀体热变形的损坏。而且即使阀门在冷状态下关闭，阀杆的热伸长也不会使密封面受到过载。同时当阀门关闭时，无导流孔的平板闸阀亦不要求闸板的关闭位置有较高的精度，因此电动平板阀可用行程来控制启闭位置。

平板闸阀的缺点

当介质压力低时，金属密封面的密封力不足以达到满意的密封。相反当介质压力高时，如果密封面不用 系统介质或外来介质润滑时，经常启闭就可 能使密封面磨损过大。另一个不足是，在圆形流道上横向运动的圆形闸板只有当它处在阀门关位置的50％时，这种阀门对流量的控制才较敏感。而且闸板在却断高速和高密度介质流时，会产生剧烈振动。如果将阀座做成V形通口并和闸板紧密的导向，则它也可用作节流。

平板闸 阀选用原则

1. 石油、天然气的输送管线，选用单闸板或双闸板的平板闸阀。如需清扫管线的，选用单闸板或双闸板带导流孔的明杆平板闸阀。

2. 成品油的输送管线和贮存设备，选用无导流孔的单闸板或双闸板的平板闸阀。

3. 石油、天然气的开采井口装置，选用暗杆浮动阀座带导流孔的单闸板或双闸板的平板闸阀，大多为API16A标准，压力等级为API2000、 API3000、API5000、API10000、API15000、API20000。

4. 带有悬浮颗粒介质的管道，选用刀型平板闸阀。

5. 城市煤气输送管线，选用单闸板或双闸板软密封明杆平板闸阀。

6.城市自来水工程，选用单闸板或双闸板无导流孔明杆平板闸阀。

Flat gate valve applicable occasions

1. Oil, natural gas transmission pipeline. Flat gate valve with flow guide hole is also easy to clean pipeline.

2. The product oil pipeline and storage equipment.

3. The extraction of oil, natural gas wellhead, also is the Christmas tree with valve.

4. With suspended particles of medium pipeline.

5. City gas pipeline.

6. Tap water engineering.

The advantages of flat gate valve

Flow resistance is small, not reducing the flow resistance and short just flow resistance. Flat gate valve with flow guide hole is installed in the pig can also be directly used on the pipeline pigging. Because ram is sliding on the two seats, flat gate valve fluid can apply to medium with suspended particles, flat gate valve sealing surface is, in fact, the automatic positioning. Seat sealing surface are not subject to the body heat deformation damage. And even if the valve is closed under cold state, thermal elongation also won&＃39;t make the sealing surface of the stem under overload. At the same time when the valve is closed, without diversion hole flat gate valve and does not require the closing of the gate location is of high accuracy, so the electric flat valve can be used to control the opening and closing position.

Flat gate valve faults

When the medium pressure is low, the metal sealing surface sealing force is not enough to achieve satisfactory sealing. The opposite when medium pressure is high, if the sealing surface without lubrication system of medium or foreign media, often open/close can be too much can make the sealing surface wear. Another shortage is that the lateral movement of the circular disc on the circular flow only when it is in 50% of the valve position, the valve to control the flow of more sensitive. And ram but in high speed and high density flow medium, can produce violent vibration. If make v-shaped his seat and disc close guidance, it also can be used for throttling.

Flat gate valve selection principle

1. Oil, natural gas pipeline, choose single or double ram disc flat gate valve. For cleaning the pipelines, choose single or double ram disc stem flat gate valve with flow guide hole.

2. The product oil pipeline and storage equipment, choose single or double ram disc without diversion hole of flat gate valve.

3. The extraction of oil, natural gas wellhead, choose non-rising stem floating seat of single or double ram disc with flow guide hole plate gate, mostly API16A standard, pressure rating for API2000, API3000, API5000, API10000, API15000, API20000.

4. With suspended particles medium pipeline, selects the knife type flat gate valve.

5. City gas pipeline, choose single or double ram disc sealing stem flat gate valve.

6. City tap water engineering, choose single or double ram disc of diversion kongming pole plate gate valve.

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