| 摘要 |
An electrically operable actuator (50) suitable for actuating a water flow control valve (10) of a hot water central heating system has a hollow body (54) containing an arrangement of bimetallic discs (55,56) enclosing an electrical heating element (59). The bimetallic disc arrangement carries a movable abutment (63) engageable with an actuating member (53) of a radiator water flow control valve housed within a valve body (51) which is connected by a screw threaded collar to the actuator body (54). The actuator is remotely controllable by passing a current through the heating element (59) causing the bimetallic discs to flex against a bias spring (57) and displace the abutment (63) to operate the actuating member (53) and alter the setting of the flow control valve. |
