Abstract: The invention relates to a fastening apparatus (1) for fastening a ventilator (2) to a carrier structure, having—at least two support elements (3a, 3b), each being connectable at the first end (4) thereof to the carrier structure, wherein at least two of the support elements (3a, 3b) have a fastening means (5) for fastening a ventilator (2), wherein—the support elements (3a, 3b) are connected at the second end (7) thereof to the adjacent support element (3a, 3b), such that the support elements (3a, 3b) mutually support each other, wherein—the fastening means (5) is spaced apart from a connection point (17), at which the second end (7) is connected to the adjacent support element (3a, 3b).

Abstract: The invention relates to a multi-port rotary slide valve in which compensation sealing sleeves are arranged in the connection ducts (P, T, A, B), which face the rotatable valve body (2), for a pressure medium source (P), a pressure medium reservoir (T) and pressure medium consumers (A, B), said compensation sealing sleeves having opposing sealing faces which are pressed against the sealing face (3) of the valve body (2) by spring force and by the pressure-medium pressure of the pressure medium passing therethrough.