STA Thermal actuators for radiator valves, small valves and zone valves STA21... STA71...
STA Features:
STA21... AC 230 V operating voltage, 2-position control signal
STA71... AC/DC 24 V operating voltage, 2-position control signal or PDM (pulse-duration modulation)
Positioning force 105 N
For direct mounting with union nut (no tools required)
Standard versions with 1.2 m or 5 m connecting cables
Two-wire connection
Position indication
Robust construction, quiet operation, no maintenance required
Optional tamper-proof fitting to prevent dismantling
