Abstract: A heat recovery unit comprise a heat exchanger (3) which is arranged in an annular space (4) which constitutes a part of an exhaust conduit (2) from e.g. a gas turbine or diesel engine. A bypass conduit (6) for the exhaust is arranged through the annular space (4), and the distribution of exhaust flow through the heat exchanger (3) and the bypass conduit (6) is regulated by means of a regulating valve (7). The regulating valve is a rotating damper valve (7) which is arranged in the exhaust conduit (2) adjacent to the heat exchanger (3), said rotating damper valve having a stationary part (8) and a rotatable part (9) which both are provided with openings (10, 12; 11, 13) which may be brought to cover or overlap each other. Both the stationary part (8) and the rotatable part (9) are formed by two conical oppositely directed portions (8a, 8b; 9a, 9b).

Abstract: A heat recovery unit comprise a heat exchanger (3) which is arranged in an annular space (4) which constitutes a part of an exhaust conduit (2) from e.g. a gas turbine or diesel engine. A bypass conduit (6) for the exhaust is arranged through the annular space (4), and the distribution of exhaust flow through the heat exchanger (3) and the bypass conduit (6) is regulated by means of a regulating valve (7). The regulating valve is a rotating damper valve (7) which is arranged in the exhaust conduit (2) adjacent to the heat exchanger (3), said rotating damper valve having a stationary part (8) and a rotatable part (9) which both are provided with openings (10, 12; 11, 13) which may be brought to cover or overlap each other. Both the stationary part (8) and the rotatable part (9) are formed by two conical oppositely directed portions (8a, 8b; 9a, 9b).