ASSA ABLOY DC 477 ASSA ABLOY DC 477 Floor spring with adjustable closing force for large and heavy doors Certified in compliance with EN 1154, size 2-4, cycle test over 1,000,000 cycles Suitable for fire and smoke protection doors For double action doors up to 170 kg Characteristics From 175° in both door swing directions with hydraulic control from 150° Two thermodynamic valves for consistent performance Adjustable door speed and latching speed from top regulating valves Backcheck Cast iron body Adjustments in all directions within the cement box Cement box in hot zinc plated Cover plates and eyelets made in polished or satin stainless steel and polished brass Interchangeable spindle from 0 to + 30 mm Available without hold-open or with hold-open angle 90° and 105° Related SMARTair products ASSA ABLOY DC420 ASSA ABLOY DC460 ASSA ABLOY DC450