Crawford high speed doors seal tightly on all four sides thanks to their unique construc- tion. The doors can maintain either overpressure or underpressure within an area. The tight sealing reduces the air leakage, so less effort is required to maintain clean air, Low air leakage reduces costs Two Crawford high speed door models - Crawford 921 OAT and Crawford 9220AT - are designed especially for applications in the pharmaceutical industry, clean rooms, hospitals, laboratories, etc. Thanks to low leakage due to the excellent sealing properties, the cost for air filtration and energy consumption is reduced. Both these doors are com- pact doors suitable for inside environments. The difference is in design, opening speed Airtight doors in environments with strict hygiene demands Crawford 921 OAT and Crawford 9220AT are available as an option in stainless steel, ideal for use in the food industry with strict demands on hygiene. The fabric curtain is easy to clean and the complete door frame and control box are made of stainless steel to withstand the effects of moisture. ASSA ABLOY, the global leader in door opening solutions ASSA ABLOY