Which closer has adjustable holdopen and closing time?

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Regular LCN closers have "3" regulating valves for General Speed, Latch Speed, and Backcheck. If the LCN closer has "4" regulating valves, then the closer has the Delayed Action feature. De...
The size 6 handed closers will have the most (strongest) closing force. The 4016 (pull side), the 4026 (top jamb push side) or the 4116  (push side parallel arm)  have the highest closing force.
For a door closer that tries to open the door instead of closing it:The closer body could be mounted backwards on the door - check instructions for proper closer orientation.It could be the wrong h...
This condition can be caused by the "closing speed adjustment" being regulated for a fast closing speed. Try adjusting the closing speed to slow down the closing of the door. If that does not corre...