Patent ID: 8578963

Claim:
Nonreturn valve for an exhaust line of a combustion device, wherein the nonreturn valve comprises a tubular body, which can be installed in a vertical section of the exhaust line and which is formed by a tubular element and a support element that is inserted into the tubular element and can be mounted removably on the tubular element, a valve seat, formed within the tubular body, for at least one float, which can be raised from the valve seat by gas flowing vertically upward, and at least one circumferential groove, which is open in the downstream direction, is arranged radially on the inside in the tubular body and is delimited by a radially inner circumferential wall section and a radially outer circumferential wall section, wherein the radially inner circumferential wall section and the radially outer circumferential wall section are formed within the tubular body, and a circumferential rim of the radially inner circumferential wall section forms the valve seat for the at least one float, wherein a circumferential rim of the at least one float projects radially over the radially inner circumferential wall section and has an axial lip facing upstream, which extends in the axial direction into the circumferential groove when the at least one float is resting on the valve seat.