They are used on fire doors to help prevent the spread of flames and smoke in the event of a fire.
Yale 4400 door closer.
All series 4400 are ansi bhma a156 4 grade 1 certified.
Yale 4400 door closers 8 products door closers pull doors closed once they ve been opened and released.
Yale s 4400 series institutional door closers offer customers the ideal combination of superior performance quality and strength.
With new pinion and piston materials improved valve design and staked valves the closers are the most efficient dependable closers in the industry.
Yale s 4400 series institutional door closers offer customers the ideal combination of superior performance quality and strength.
With upgraded pinion and piston materials improved valve design and staked valves the closers are the most efficient dependable closers in the industry.
With new pinion and piston materials improved valve design and staked valves the closers are the most efficient dependable closers in the industry.