... 4.Stroke:3mm Electronic Modulating Thermal Actuator To Control Valves1. Production Description The TA-01 Series actuator has no rotating ... both NO (normally open) radiator valves, and NC (normally closed) small valves The TA-01 Series actuator has no rotating parts, ... normally open) radiator valves, and NC (normally closed) small valves 2. Technical Data : Working Mode On/off, Modulating (0-10Vdc)Usage ...