FIELD: valve industry.
SUBSTANCE: invention relates to the oil and gas industry shutdown pipeline valve drives, liquids and gas transportation systems and can be used in fluid motion control systems in Christmas trees, including at deep-water production in open sea, for opening and closing of product pipelines under high pressure. Drive of the shut-off pipeline valves comprises a rod connected to the gate and a bellows assembly, one end of which is rigidly fixed in the body. Second end of the assembly is closed by a movable support, in which the inner side of the valve stem rests, wherein the outer cavity of the assembly in the housing is connected to the control pressure, and internal – filled with gas mixture under pressure with possibility of its compression during valve opening and providing opening after removal of control pressure.
EFFECT: drive ensures reliable operation of bellows pipeline valves.
1 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2740327C1 |
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|
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|
RU2822725C2 |
