Gas pipeline shut-off device, has shut-off valve, which pivots swivel axis between opening and closing positions, in which valve together with swivel axis is outside gas flow profile of housing in opening position

摘要

The device has housing (1) including connectors and is fit to a gas pipeline, and a shut-off valve (2) which pivots a swivel axis between opening and closing positions. The shut-off valve together with the swivel axis is outside the gas flow profile of the housing in the opening position. The transition from the opening position to the closed position is calculated mathematically or empirically.