Product Description
Siemens STA121.40L10, S55174-A219
for radiator valves and floor heating
Electrothermal actuators, stem extended in a deenergized state (NC) for 2-position and quasi-proportional control of heating systems, chilled ceilings and terminal units. With position indication and connecting cable.
Suited for:
- Radiator valves VDN../VEN../VUN../VPD../VPE..
- Floor heating
- Valves of other manufacturers
Additional info
For fitting to valve: Cap nut M30 x 1.5