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Ex protection
   

TA Roloff actuators also allow the automation of valves situated in areas where explosive ambient atmospheres occur due to the presence of gases or moistures. In these areas there is always the risk in that the dangerous atmospheres can find their way into the actuator, ignite due to a spark from the electromotor (if the flashpoint temperature is reached) and reach adjoining areas through gaps of the housing (so called flame transmission capacity). All TA actuators carry the ignition protection category „d II C T6”. This means they offer protection via a flameproof enclosure “d” against explosions caused in the surrounding environment consisting of the most flammable gases (category “C”) with low flashpoints (“T 6”).    

The actuator series TA 130 Ex and TA 140 Ex have a higher level of fire protection denoted by the letter “e”. They can be used in areas made dangerous by flammable gases on a case by case basis where the use of electric motors would not otherwise be allowed.   

 

TA 70 Ex TA 130 Ex TA 140 Ex
0-32 32-280 280-1500
0-300 300-4000 4000-11500
Ex II 2G
EEx d  II C
T6
Ex II 2G
EEx de  II C
T6
Ex II 2G
EEx de  II C
T6