For radiator valves, small valves and Combi valves Electromotoric actuators for modulating or 3-position control of heating systems, chilled ceilings and terminal units. With automatic stroke adaption, force-dependent switching off in the end position, position indication, manual control and plug-in type connecting cable. Suited for use with Siemens radiator valves VDN../VEN../VUN../VPD../VPE.., Siemens small valves VD1..CLC and on radiator valves with M30 x 1.5 connection (Heimeier, Cazzaniga, Oventrop M30x1,5, Honeywell-Braukmann, MNG, Junkers, Beulco new). Further valves of other manufacture on request. Suited for Siemens Combi valves VPP46../VPI46.. with 2.5 and 5 mm stroke.For fitting to the valve: Cap nut M30 x 1.5 SSA61..: 1.5 mm minimal stroke required for self calibration