| 摘要 |
The shutter possesses a soft peripheral gasket (22) and is movable between a closed position, in which the gasket (22) is laid against an annular seat (24) surrounding a passage orifice, and a siding position set apart from the said passage orifice. In order to reduce the thermal stresses on the gasket, the seat (24) has an internal circular channel (28) connected to a circuit of a temperature-regulating fluid. �<IMAGE>� |
