he model RDOF has been developed mainly to power fire-rated rolling doors. Patent-pending fusible-link fire release system, incorporated with the operator brake mechanism, will, in the event of fire or heat above 160oF, (71oC)automatically release operator door and allow descent of curtain at controlled speed, eliminating the need for expensive safety-governors and fusible-link drop-levers, normally used to retard closing speed of door. Door must be counter-balanced up to 85% of curtain weight and built in accordance with the Under Writers Laboratories of Canada (ULC) requirements. This unique cylindrical and compact design has universal mounting: left or right. Can be installed in front of door curtain without the need for additional sideroom.

SKU RDOF Categories ,

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