Flow cut-off device for insertion in a gas duct

Details Flow cut-off device for insertion in a gas duct Flow cut-off device for insertion in a gas duct

F - Mech Eng,Light,Heat,Weapons

16

K

137/34

F16K 15/00 (2006.01)

Patent

CA 1110519

ABSTRACT The device has a gas passage of adjustable flow cross-section through which gas flows in normal use. Inflowing gas also acts on a blocking member, and when the pressure of the inflow gas rises above a certain value, the pressure on the blocking member is sufficient to move the blocking member into the gas passage to block the passage. The blocking member is then retained in position in the passage, blocking the gas flow by the gas pressure. The blocking member can be a ball which is moved against the force of gravity by the pressure of the gas to close the passage.

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