Deltana DP4041P Drop Plate for DC40 Door Closer - Parallel Arm Installation

The DP4041P is a mounting accessory for the Deltana DC40 door closer, used for parallel arm installation. A drop plate lowers the closer body below the frame face so the closer still has a flat mounting surface when the head frame is too narrow or obstructed to take the closer directly. It is not a closer itself and it does not change the closing power; it only gives the DC40 somewhere to bolt to. Steel, 1/4 inch thick.

No. The DP4041P is the parallel arm version of the Deltana drop plate, so it is drilled for a DC40 mounted with the arm parallel to the door face on the pull side of the opening. If the DC40 is going up regular arm or top jamb, this plate's hole pattern is the wrong one and you need the drop plate made for that mounting.

The DP4041P is a 1/4 inch thick steel mounting plate that drops the closer body down on the door face so a Deltana DC40 can be mounted parallel arm where the top rail or stop does not give enough flat surface. It is a Deltana DC40 accessory and does not carry over to another maker's closer. On a Cal-Royal 900 Series closer, the matching accessory is the Cal-Royal 900 Series Door Closer Accessories Kit, CAL-900-ACC. Match the plate to the closer family you actually have on the door; drop plates are drilled to the specific closer's shell pattern.

A deep reveal is a reveal problem, not a plate problem. The Deltana DP4041P addresses the door face under a DC40 closer body in a parallel arm mount; it does not change how far the arm has to reach back to the stop. For a deep reveal on an LCN 1260 Series closer, the LCN 1260-30 Cush Shoe Support is built for 3-1/16 inch reveal compatibility. Measure from the door face to the stop before ordering either part, since that dimension is what decides which one you need.

Four finishes: Aluminum, Duro, Gold, and White. The plate sits right under the closer body in plain sight, so order the finish that matches the DC40 you are hanging. On a fleet of openings where the closers were bought at different times, check the closer body rather than assuming, since a Duro plate against an aluminum closer reads as a mismatch from across the lobby.

No, those are not interchangeable parts. The Deltana DP4041P is a 1/4 inch steel plate that the closer body bolts to. A track such as the LCN 4040SE-3038 Standard Track for fire and life safety door closers, or the LCN 4040SEH-3038 Hold Open Track, is the channel the arm roller runs in on a track-arm closer and mounts on the frame or soffit, not under the closer body. A parallel arm DC40 installation short on mounting surface needs the DP4041P; a track only fits a closer designed to run an arm in one.

They serve different closer types. The Dorma 15323 is a 1-1/2 inch offset bottom arm with cover, a standard duty part with no fire rating, and it belongs to a pivot or floor closer arrangement at the bottom of the door. The Deltana DP4041P mounts at the top of the door and gives a DC40 surface closer a steel mounting surface for a parallel arm installation. If the door is hung on a bottom closer, the drop plate has nothing to attach to.

Commercial. Deltana classes the DP4041P as a commercial door hardware item, which is the right answer for corridor, entry, and stairwell openings in an office, school, or multi-family building where the DC40 is doing real duty cycles. It is steel, not a stamped residential bracket.

Each. One DP4041P covers one closer, so a job replacing closers on six openings needs six plates. It is a single-part accessory rather than a bundled kit like the Cal-Royal 900 Series Door Closer Accessories Kit, so anything else the install needs comes separately.

Matching matters because the plate sits in plain view beside the closer body on the door face. The Deltana DP4041P is offered in Aluminum, Duro, Gold and White so it can be ordered to the finish of the DC40 it mounts. Concealed accessories are a different case: the LCN 1260-30 Cush Shoe Support and the LCN 1260-18QF Quick Fix Bracket Kit are structural pieces for LCN closers, and the Dorma 15323 offset bottom arm ships with a cover. For a property manager standardizing a run of openings, pick one plate finish across the doors so the whole set reads the same.