The shutters VKS and VKM aremanufactured from galvanized steel,shutter blades from seawater resistantaluminium.VKM is equipped with a servo motor(230 V/50 Hz/25 W), which can beoperated manually as well as through theautomatic controllers of the air conditioningunit. While the motor is energized theshutter stays open. When separatedfrom the supply the shutter will closeautomatically. For temperatures up toapprox 70 °C. Suitable for DVS/DHS, DVSI,DVN.The automatic shutter VKS-EX/VKSV-EXconsists of flanges manufactured fromgalvanized steel epoxy painted RAL 9005,and of shutter blades manufactured frompainted galvanized steel RAL 9005.