Cut-off device for sealing gas pipe, has sealing unit located on outer side of housing, with which housing is flush with inner wall of pipeline section, where unit includes two ring seals in gas flow direction located away from each other

摘要

The device has a valve body supported displaceably in a guide component, which is held at a tubular housing. The body is pre-stressed against a gas flow direction from a valve seat by a spring. A sealing unit is located on the outer side of the housing, with which the housing is flush with an inner wall (16a) of a pipeline section (16). The sealing unit includes two ring seals (17, 18) in the flow direction located away from each other.