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US 12,680,624 B2Granted
Integrated pressure balancing system in ball valve
AssigneeHabonim Industrial Valves & Actuators Ltd.
InventorsIdo Navon, Einat Opalin, Guy Cooper
Life of this patent
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Abstract
A valve includes a ball coupled to a stem which is turnable by an operator element. The ball is formed with a flow passage and the ball is sealed in a valve seat by means of seals. The stem includes bypass structure, which upon rotation of the stem, is alignable with an upstream diverging tube and with a downstream diverging tube to allow bypass fluid flow from the upstream diverging tube to the downstream diverging tube for balancing a difference in pressure between upstream and downstream portions of the valve.
Claims9
A valve comprising:
- a ball coupled to a stem which is turnable by an operator element, said ball being formed with a flow passage and said ball being sealed in a valve seat by means of seals;
- and
- wherein said stem comprises a bypass structure, which upon rotation of said stem, is alignable with an upstream diverging tube and with a downstream diverging tube to allow bypass fluid flow from said upstream diverging tube to said downstream diverging tube for balancing a difference in pressure between upstream and downstream portions of said valve,
- and wherein said stem comprises a ball key portion which couples with a keyway aperture formed in an interface member extending from said ball, and said ball key portion is shaped to allow free rotation of said stem with respect to said keyway aperture through a rotation angle α, and wherein said ball key portion comprises a pair of relatively long flat faces that are inclined so a width of said ball key portion is widest at a center of a long side of said ball key portion, and a pair of relatively short flat faces that are inclined so a length of said ball key portion is longest at a center of a short side of said ball key portion.
1 more element
A valve comprising:
- a ball coupled to a stem which is turnable by an operator element, said ball being formed with a flow passage and said ball being sealed in a valve seat by means of seals;
- and wherein said stem comprises a bypass structure, which upon rotation of said stem, is alignable with an upstream diverging tube and with a downstream diverging tube to allow bypass fluid flow from said upstream diverging tube to said downstream diverging tube for balancing a difference in pressure between upstream and downstream portions of said valve, wherein said bypass structure is positioned between, and is rotatable to align with, a pair of bypass pistons which are arranged to slide inside bypass tubes, one of said bypass tubes being an upstream bypass tube which is in fluid communication with said upstream diverging tube, and another one of said bypass tubes being a downstream bypass tube which is in fluid communication with said downstream diverging tube, and wherein each of said pistons is urged by a biasing device towards said stem.
A valve comprising:
- a ball coupled to a stem which is turnable by an operator element, said ball being formed with a flow passage and said ball being sealed in a valve seat by means of seals;
- and wherein said stem comprises a bypass structure, which upon rotation of said stem, is alignable with an upstream diverging tube and with a downstream diverging tube to allow bypass fluid flow from said upstream diverging tube to said downstream diverging tube for balancing a difference in pressure between upstream and downstream portions of said valve, wherein when said flow passage of said ball is open to flow, said bypass structure permits the bypass fluid flow from said upstream diverging tube to said downstream diverging tube.
Dependencies are inferred from the claim text.