Almost all door closers will have the above two adjustment hydraulic valves but some have additional features which can be adjusted similarly.
Fire door closers adjustment.
Door closers consist of a pneumatic cylinder which controls the speed of the door and a bracket which holds the cylinder to the door.
It is used to adjust the spring strength force to close the door.
Other door closer adjustments.
We installed a commercial door closer for our office in a previous video and in this video we wanted to show two diff.
Spring adjustment is located on the end of the spring tube 5 32 allen wrench.
The back check valve if featured will usually be set apart from the first two discussed and may be marked with a b or bc.
Look at the end of the cylinder closest to the bracket with the door closed to see the adjustment screw.