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FM System Spring Return
Petrochemical plants process valuable products and have areas in which explosive conditions can occur. The TA FM System has been especially modified for use in these areas. The flame transmission resistant casing ensures that the electrical components of the TA FM System cannot become ignition sources in explosive surroundings.  Even if the electric actuator is destroyed or blocked, the fail-safe mechanism will ensure that the valve moves into its safety position because the gear rack and the closing spring are activated independently of the actuator. The usability of TA products in potentially explosive environments is endorsed by design tests according to ATEX guidelines and adherence to the relevant norms is continuously checked. 

Fail-safe function in potentially explosive areas EG design guidelines ATEX Ex II 2G Ex mb IIC T3


  • Suitable for use in Zones 1 and 2
  • Device categories 2G and 3G
  • Encapsulation “m”
  • Suitable for gases with a high flame transmission capacity and low ignition points
  • Optimum protection for processed products as well as the environment