most common concealed closer for double acting

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To mount the 6030 series closer in a hollow metal frame, the frame has to be a "cased open" frame (meaning no stops formed in the frame) because the 6030 series closer is a double acting closer, wh...
The LCN direct retrofit for the Obsolete 303 OHC closer was the 330 series, it was discontinued in 2009. The 3030 closer door closer body can be used as a replacement cylinder. 
The Date Code and Closer Size are stamped in the backside of the closer body. Closer Size: If the number is "1", the closer is a 2031 or 5031. If the number is "3", the closer is a 2...
The Dor-O-Matic overhead concealed manual door closers have been obsolete since 1999, and there are no parts available for them.
Overhead Concealed door closers are used to provide a more aesthetic look to the opening.  Concealed in either the frame or the door Offer the ability to be adjusted to maintain control o...
The LCN 6030 is a Double Acting (or dual action) closer. Requires a "Cased Open Frame" - that means no stops formed in the frame.
CO, Cased Open
Door Swing
Double Acting Closer, HMF, Hollow Metal Frame