Rotary actuator / explosion-proof / air check-valve / quarter-turn
Schischek Explosionproof


  • Movement:


  • Protection level:


  • Product applications:

    air check-valve

  • Other characteristics:



The VAV control is explosion proof and features 90° quarter turn actuators and differential sensors. The electrical, explosion proof quarter turn actuators of Series ExMax and RedMax are used for VAV dampers. The torque ranges from 5 Nm to 150 Nm and they meet ATEX 94/9/EC standards. They are ideal for installation in hazardous areas - zone 1, 2, 21 and 22 - for all types of vapors, gas, dust and mixtures.

The actuators with or without a fail safe spring return function operate on a 24 to 240 VAC/DC multi-voltage supply. Five motor running times can be adjusted on site. It includes an on/off, 3-pos, 0-10 VDC and 4-20 mA mode and is protected 100% against overload. It has a sturdy aluminum housing which has IP66 protection and an integrated heater which can be used in temperatures ranging from -40°C to +40°C/+50°C.

Its approximately 1 m cable comes with manual override, having a squared 12 x 12 mm size S or 16 x 16 mm size M shaft connection. You may order stainless steel or Amercoat painted versions.


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