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US 5,669,415 AGranted
Shut-off device of the double block-and-bleed type
AssigneeBrdr. Christensens Haner A/S
InventorWerner Trunk
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AssigneeBrdr. Christensens Haner A/S
InventorWerner Trunk
Estimating the term…
A shut-off device of the double block-and-bleed type comprising a flow passageway accommodating two shut-off members provided with through-going cavities, and a drain means. The flow passageway is provided with an inlet and an outlet. Each of the shut-off members may be moved between a position in which the flow passageway is open and a position in which the flow passageway is closed. In association with the shut-off members two auxiliary chambers are communicating with cavities of the shut-off members. The shut-off device is formed of a single undivided casing. The shut-off members are truncated cone-shaped and mounted in matching truncated cone-shaped recesses in the common casing. As a result, the overall length of the shut-off device may be reduced compared to prior art. Moreover, the tightness at high pressure, e.g. above 100 ato. is enhanced.
A shut-off device of the double block-and-bleed type, comprising first and second shut-off members provided with a through-going cavity and a drain means are provided in association with a flow passageway, the flow passageway having an inlet and an outlet, said shut-off members each being movable between a position in which the flow passageway is open and a position in which the flow passageway is closed, first and second auxiliary chambers respectively associated with the shut-off members, the auxiliary chambers being capable of communicating with the cavities of the shut-off members, the shut-off device further comprising a single undivided casing having first and second abutment faces, and the shut-off members being essentially truncated cone-shaped and respectively mounted in matching essentially truncated cone-shaped recesses in the casing, the auxiliary chambers forming part of these recesses.
Dependencies are inferred from the claim text.