Valve, in particular regulating or shut-off valve, for liquid or gaseous media

摘要

Valve, in particular a regulating or shut-off valve, for liquid or gaseous media, having a valve housing (12) which has at least one through-bore (14) which connects an inlet opening (21) to an outlet opening (16) with one on the valve-closing housing ( 12) and the through hole (14) surrounding valve seat (17) which is closable by a valve closing member (31) which in a the valve housing (12) between the inlet opening (21) and the outlet opening (16) formed Regulierraum (22) is arranged with a on the valve housing (12) connectable drive (35) for controlling the opening and closing movement of the valve closing member (31) at least one adjusting element (39) made of a shape memory alloy and the valve closing member (31) for opening or closing the through hole (14) and actuated with a return element (33), which a closing or opening movement of the valve Closing member (31) counteracts, wherein the adjusting element (39) is formed from at least one wire element and by energization with a control device (44) is controllable, and the actuating element (39) between a point (34) of the valve closing member (31) and a Engagement point (37) on the valve housing (12) or attachable thereto housing portion (19) acts, and the adjusting element (39) is arranged in the media flow-through Regulierraum (22), characterized in that - the actuating element (39) in sections of a protective sleeve (45) is surrounded, - that the protective sleeve (45) loosely over the actuator (39) is slipped and between the protective sleeve (45) and the adjusting element (39) is formed a small annular gap, and - that the length of the protective sleeve (45) of the length the activated actuating element (39) in the arrangement of the valve closing member (31) in a maximum opening position is equal to or shorter.