The DREHMO Fail Safe system has been developed for emergency cases in which a valve/ damper has to be moved quickly into the fail safe position (position “OPEN” or position “CLOSED).While the valve/ damper in normal cases is moved by our electric DREHMO actuator it will be driven in emergency cases by a loaded coil spring which makes the emergency operation very fast and independent from electrical power supply. The extremely short closing times of below 1 sec can be adjusted if requested, by a hydraulic brake.

Technical data

Type Part Turn (Thrust on request)

Fail-Safe Position OPEN or CLOSEMode of operation FAIL-SAFE or TRIPPINGClosing time < 1 sec … with hydraulic brake < 10 secVoltage 24V DC or 230 V ACWeight < 22Kg Option: ATEX Ex II 2G mb IIC T3

Fail-Safe System

Torque* 20 50 100 140 180 210

Closing time <1 sec <1 sec <1 sec <1 sec <1 sec <1 sec* higher torques on request

DREHMO GmbHZum Eichstruck 1057482 WendenGermanywww.drehmo.com