Lockwood FD481 Mechanical Coordinator for Double Doors Lockwood FD481 Mechanical Coordinator for Double Doors Lockwood FD481 Mechanical Coordinator for Double Doors The FD481 is useful in applications where doors are normally kept closed and the active door is used as a passage door. The FD481 is designed for double doors with hinge distance up to1350 - 2800 mm. The FD481 mechanical coordinator keeps the active door open when inactive door is open. The Active door starts to close when the inactive door is almost closed. After the active door is closed it latches the inactive door. Major Features of the FD481 DesignCompact modern design to suit double door installations. Fire RatedThe Lockwood FD481 Concealed Door Control System has been successfully fire tested up to 2 hours on fire door assemblies in accordance with Australian Standard AS1905.1:2005 - Part 1: Fire Resistant Doorsets. Flexibility In InstallationOne unit suits both push side or pull side Door Sizes Double door applications minimum 1100mm, maximum 2100mm Non fire rated model available on application suits double doors up to width 2800mm Leaf weight 100kgs Opening AnglesMaximum opening angle 120° Downloads Lockwood Fire Door Closing Systems Catalogue.pdf (.pdf, 998 kB) Close Part numbers Trade Pack Description Part Number Silver, 40mm Minimum Door Thickness, Power Size 1-4 FD481 Silver, 48mm Minimum Door Thickness, Power Size Size 1-5 FD491 Close Where to buy? Find your local Lockwood stockist. Lockwood 2516CO Mechanical CoordinatorDouble doors. Lockwood FD480 Electromechanical Hold-Open DeviceSingle doors. Lockwood 2516EMCD Electromechanical Hold-Open DeviceDouble doors.