Actuators are needed to open and close the water cycle of a heating system or cooling ceiling. For this, the actuating drive are screwed or snapped onto a valve. In this eibabo catalog you will find conventional actuators 24V or 230V currentless normally open or closed and KNX actuators incl. bus coupler together with installation accessories. Conventional actuating drives are connected to KNX heating actuators, see Catalog Smarthome> heating actuator. Because, contrary to many opinions, thermoelectric actuating drives are not wear-free and should be replaced every few years, earlier, more expensive types of KNX actuators, ie devices which combine the KNX actuator and actuating drive, have not sold well and are increasingly disappearing from the market. The ETS parameter 'flushing' helps to minimize wear on rarely used valves, eg in the summer or in bedrooms. This feature prevents rapid calcification of the heating valves. The relatively inexpensive thermoelectric actuators (valve actuators) can be clicked directly onto the valve bonnet used in the house or screwed on (usually directly in the heating circuit) and, thus, connected to the valve spindle. Adapters made of PVC or metal can be used to compensate manufacturer-specific differences in distance between the drive and the valve bonnet or the thread and the intake to ensure correct implementation of the manipulated variable. Besides thermoelectric actuators, we offer KNX actuators, KNX radiator valve drives, KNX actuators including binary inputs, KNX motor-valve drives, electromotive actuators, radiator regulating actuator, valve adapters for actuators, wireless motor actuators, motor valve drives with controller, receivers for heating actuators, radiator valves wireless, wireless motor valve actuators, wireless radiator thermostats and KNX actuators with integrated room temperature regulator from major brands such as ABB, Busch Hunter, Eaton, Gira, Hager, Hydronics, Issendorf, Lingg & Janke, Merten, MDT, Siemens, Somfy and Theben.