The TH-81 is a thermoelectric actuator designed for closing and opening the valves of heating circuits for floor heating and radiators with the use of the AC-116 control unit. NO version – normally open (without power the valve is open)
| Version | normally open |
| Voltage | 24 V AC/DC, +20 %...–10 %, 0 – 60 Hz |
| Max. inrush current | 250 mA during 2 min max. |
| Operating current | 75 mA |
| Operating power | 1.8 W |
| Closing and opening times | approx. 6 min. |
| Actuator travel | 4 mm |
| Actuating force | 100 N ±5 % |
| Fluid temperature | 0 °C to +100 °C |
| Storage temperature | -25 °C to +65 °C |
| Ambient temperature | 0 °C to +60 °C |
| Degree/class of protection | IP 54/III |
| CE conformity according to | EN 60730 |
| Housing | polyamide |
| Housing colour | grey |
| Weight | 100 g with a 1 m connecting cable |
| Connecting cable | 2 x 0.75 mm2 PVC, grey |
