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UL
UL are gravity louvre dampers designed to prevent air backflow when the HVAC system is not in operation. The UL pressure relief dampers are available in standard sizes as well as many intermediate sizes. The angled profile edge is installed in wall penetrations. A mounting frame can be supplied as an optional accessory. The dampers can also be powder coated. The UL non-return dampers are equipped with aluminium sheets which are fitted with a noise-proof seal.
Possible variants of the UL non-return dampers:
UL-1: For exhaust air openings
UL-2: For supply air openings
Product Line Data Sheet: ds-ul-en.pdf
Product Line Installation Instructions: manual-ul-kul-wg-kul-ark-en.pdf
Send us a request info@ventilatory.net or contact us by phone: +420 417 565 655 
