Lockwood 2657 Heavy Duty Series Door Closer The Lockwood 2657 Heavy Duty Series is suitable for use on internal and external doors and is an ideal solution for extremely heavy doors. Maximum door weight 160kg and door leaf width 1600mm with standard arm installation. Specification Power EN adjustable 5 to 7 Back check (BC) Adjustable Handing Non-handed.Suitable for left or right hand doors. Cover Fully formed metal Materials Die-cast aluminium body manufactured from high performance silicon alloy Mechanism Rack and pinion design Mounting Regular and over-door mounting Valves Two pressure relief valves are a standard feature to protect against abuse Operating Temp -35°C to +45°C Note: Parallel arm (push side) is not available on this model. Close Downloads 2557 Left Hand Pull Installation Instructions.pdf (.pdf, 1.6 MB) 2557 Right Hand Pull Installation Instructions.pdf (.pdf, 1.6 MB) Lockwood Surface Mounted Door Closers Catalogue.pdf (.pdf, 5 MB) Close Where to buy? Find your local Lockwood stockist. Lockwood 726SR Series Slide Door CloserEN power adjustable 2 to 6. Lockwood 7726SRDA Series Premium Range Surface Mounted Door CloserEN power adjustable 2 to 6. Lockwood 724 Series Door CloserEN power adjustable 2 to 4.