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“ what is advanced variable backcheck do ”

Resolution: AVB stands for Advanced Variable Backcheck. It is a cylinder option when ordering, that allows backcheck to start at about 45 degrees instead of the normal 75 degrees. 4110, 4210...:

ADVANCED VARIABLE BACKCHECK CYLINDER

Resolution: AVB, Cylinder Function, 4110 Series Closer:

AVB

Resolution: Advanced Variable Backcheck:

What is the valve on the back of a 4041/4040XP closer used for?

Resolution: The valve on the back of a 4041/4040XP closer is a "Back Check Selector Valve" that needs to be turned in on "Parallel Arm" mount applications ONLY. :

How do you adjust a door closer?

Resolution: How to: What are the steps to adjust a door closer? Facts: All LCN and FALCON door closers will have 3 regulating valves and a spring adjustment. All closers with a "Del...:

BACKCHECK

Resolution: Closer Adjustment, Door Control:

BACKCHECK SELECTOR VALVE

Resolution: Valve used to provide proper backcheck location for 4040XP and 4050A parallel arm mounting:

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“ what is advanced variable backcheck do ”

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