STP321 For radiator valves, small valves and Combi valves Electrothermal actuators for 2-position and quasi-proportional control of heating systems, chilled ceilings and terminal units. With position indication and connecting cable. Types with 1 m, 2 m and 5 m cable available. Suited for use with Siemens radiator valves VDN../VEN../VUN../VPD../VPE.., Siemens small valves VD1..CLC and V..I46.. and radiator valves with M30 x 1.5 connection and 2.5 mm stroke (Heimeier, Cazzaniga, Oventrop M30x1,5, Honeywell-Braukmann, MNG, Junkers, Beulco new). Suited for Siemens Combi valves VPP46../VPI46.. with 2.5 mm stroke. Special applications (actuator de-energized, valve open): For small valves VVP47.., VXP47.., VMP47.. For Siemens radiator valves and valves of other manufacture, see actuator type STP.. For Combi valves VPP46.., VPI46.. Information complémentaire For fitting to valve: Cap nut M30 x 1.5