what does del do

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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...
Delayed Action Cylinder
DEL, delay closing
CX, DE5101, RCM, DE (390DEL, DE5101, CX, RCM, 390+DEL, 101+, 101+ Series)
4040XP Series (4040 DEL) is a universal closer. *(see note) Non Handed closer. Can be mounted on a RH or LH door. 4041XP - Adjustable size 1 to 6. Can mount push side or pull side of the doo...