Dorma RTS88 Series - RTS31 Ove...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$918.00
$715.01
Dorma RTS88 Series - RTS31 Overhead Concealed Door Closer, 3/4" Offset Pivot Hung, Single Acting, Wood Door and Aluminum Frame (Non-Handed)

Dorma RTS88 Series - RTS31 Overhead Concealed Door Closer, 3/4" Offset Pivot Hung, Single Acting, Wood Door and Aluminum Frame (Non-Handed)

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Model: RTS31 105 NHO SZ2 8563
$918.00
$715.01
Selected Finish (Including 8653 Cover Frame) is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$918.00
$715.01
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DORMA RTS88 Series Overhead Concealed Door Closer

The RTS88 is designed to give lasting, dependable service where surface applied units and other types of closers are not suitable, or would interfere with the architectural design. It can be easily installed in wood, aluminum, or hollow metal doors and frames, for single and double-acting doors.

  • Concealed installation
  • For single and double-acting doors
  • Dependable and easy to Install

Aesthetic advantages

Architects are often challenged to design buildings that are both beautiful and functional, down to the last detail. The DORMA RTS88 overhead concealed door closer offers the perfect solution for those who prefer the aesthetic advantages of a concealed door closer.

Vandalism protection

The RTS88 is an excellent replacement closer for problem entrances encountering vandalism of surface applied closers.

Benefits for the contractor

Contractors appreciate the RTS88 closer, because the majority of door and frame preparation is done prior to installation of the unit, resulting in less on-site machining.

Resources:
RTS88 Series Catalog

Manufacturer Resources

Product Specs

Product Group:
Door Controls
Series:
RTS Series
Product Subgroup:
Door Closers - Overhead Concealed
Product Type:
Overhead Concealed Door Closers
Subcategory:
Concealed Door Closers
Door Weight:
250 lbs
Door Swing:
Single Acting
Commercial/Residential:
Commercial
Package Features:
3/4" Offset Pivot ; Wood Door ; Aluminum Frame
Product Model:
RTS31
Door Hand Direction:
Non-Handed
Product Category:
Door Controls
Department:
Door Hardware

Dormakaba RTS31 105 NHO SZ2 8563 – Frequently Asked Questions

1) Will the Dorma RTS31 concealed closer work on a wood door in an aluminum frame?
That is exactly the combination the RTS31 is packaged for: 3/4 inch offset pivot hung, wood door, aluminum frame. It handles doors up to 250 lbs and is single acting, so it swings one direction only. If your opening is double acting (swings both ways), this is the wrong package for it.
2) Do I have to order the RTS31 closer left hand or right hand?
No handing to specify. The RTS31 is non-handed, so one unit covers either swing direction on a single acting opening. That is useful for a property manager stocking spares across a building instead of keeping both hands on the shelf.
3) Which spring size should I pick for a 3 foot exterior door on a Dorma RTS88 closer?
Five spring sizes are offered. SZ3 is the standard closing force and covers 2'-6" to 3'-0" exterior doors or 3'-0" to 3'-6" interior. SZ4 is the strongest, for 3'-0" to 3'-6" exterior or 3'-6" to 4'-0" interior. SZ2 is a light opening force. For accessible openings there are two barrier free options at 3'-0" door width: BFE for exterior and BFI for interior.
4) What else could I use if the Dorma RTS31 does not suit my opening?
Depends on how the door hangs. For a center hung leaf rather than offset pivot, the Norton Rixson 608 Series and 700 Series are center hung overhead concealed closers rated for 200 lb doors. For a double acting opening, the Norton Rixson 73 Series is center hung double acting, Grade 1 heavy duty, with a cover plate and 250 lb capacity. On aluminum doors hung on offset pivots, the Norton Rixson 0608 Series is the standard duty offset hung equivalent.
5) Can the RTS31 overhead concealed closer hold the door open?
Hold open is an option you choose at order time, yes or no. Pair it with the cushion stop angle, which is offered at 90 or 105 degrees. Pick the cushion angle to match the wall or adjacent condition the door swings toward, because that sets where the unit cushions the swing.
6) What extras can I add when ordering the Dorma RTS31, and do I need them?
Three package options: Standard, Add 8563 Frame Cover Plate, or With 5mm Extended Spindle. The cover plate finishes the frame pocket where the header prep is exposed. The extended spindle is for thicker door top rail or header conditions where the standard spindle does not reach the pivot. Finish selection, including the 8653 cover frame, runs 600 Prime Coat, 689 Aluminum, 690 Statuary Bronze, 691 Dull Bronze, 693 Black, 695 Dark Duradonic Bronze and 696 Gold.
7) Why choose an overhead concealed closer instead of a surface mounted one?
Two practical reasons drive it. Aesthetics: the RTS88 hides in the frame head where a surface closer would sit on the face of the door and clash with the architecture. Security: it is a common replacement at entrances where surface closers keep getting vandalized, since there is nothing exposed to pry or rip off. The tradeoff is prep. Most of the door and frame machining happens before the unit goes in, so it is easier on site but harder to add to an existing opening that was never prepped.
8) I just need a replacement closer body for an existing concealed installation. Is the RTS31 that?
No. The RTS31 is a complete closer package built around a 3/4 inch offset pivot wood door and aluminum frame application, not a drop-in body for someone else's header. If you are replacing only the guts in an existing pocket, look at body-only units such as the CRL Jackson regular duty concealed closer body, offered in 90 degree and 105 degree non hold open versions, the heavy duty body at 105 degrees, or the adjustable spring power body at 105 degrees.
9) I need the door to swing a full 180 degrees. Will the RTS31 do it?
Not as ordered. The RTS31 cushion stop is offered at 90 or 105 degrees, so the swing is controlled to one of those angles. If the opening genuinely needs a 180 degree swing, the Sargent 269 overhead concealed closer is built for 180 degree opening capability.
10) Do I need a barrier free spring size for an ADA accessible door?
If the opening has to meet a reduced opening force requirement, order BFE for an exterior door or BFI for an interior door, both sized for a 3'-0" door width. Both are the light opening force springs. SZ3 and SZ4 are standard and strong closing forces and will read heavier at the pull.
11) I only need to replace the closer body in an existing concealed pocket. Is there a simpler option than a full Dorma RTS31?
Yes. The CRL Jackson 20-101M-01 and 20-101M-03 are regular duty overhead concealed closer bodies only, in brown, with no hold-open, in 105 degree and 90 degree respectively. The Dorma RTS31 is supplied as a complete closer with a choice of 90 or 105 degree cushion and hold open or non hold open, so the body-only Jackson units suit a like-for-like body swap where the existing header prep and hardware stay in place.
12) What is the difference between the CRL Jackson regular duty and heavy duty concealed closer bodies if I am cross-shopping against the Dorma RTS31?
The CRL Jackson 20-101M-01 is a regular duty concealed closer body in 105 degree no hold-open; the 20-101M-09 is the heavy duty body in the same 105 degree no hold-open configuration. There is also the 20-101M-17, an adjustable spring power body in 105 degree no hold-open. The Dorma RTS31 handles spring power by ordered spring size instead, from BFI and BFE barrier free light opening force through SZ2, SZ3 and SZ4.
13) Is the Sargent 278 a drop-in substitute for the Dorma RTS31?
Not directly. The Sargent 278 is an overhead concealed closer with an exposed arm, so the arm shows below the header once installed. The RTS31 is a fully concealed unit on 3/4 inch offset pivots, chosen where surface applied or visible hardware would interfere with the architectural design or invite vandalism. If the appearance of a concealed header is the point of the spec, the 278 changes it.
14) Which concealed closer has the heaviest door rating, the Dorma RTS31 or the Norton Rixson units?
The Dorma RTS31 carries a 250 lb door weight rating, as does the Norton Rixson 73 center hung double acting closer. The Norton Rixson 0608, 608 and 700 are each rated for doors up to 200 lbs. For leaves over 200 lbs the RTS31 on 3/4 inch offset pivots or the center hung 73 are the ones to size against.
15) Is the Dorma RTS31 suitable for a high traffic commercial entrance?
It is a commercial grade unit, rated for doors up to 250 lbs, which covers heavy wood entrance leaves. Concealed mounting also removes the usual failure point at abused entrances, where surface closers get torn off. For a heavier duty alternative, Sargent's 268 overhead concealed closer uses a cast iron body and is Grade 1 heavy duty.
16) Do I need to order handing when choosing between the Dorma RTS31 and its alternatives?
The Dorma RTS31 is non-handed, so one unit covers either swing direction and handing does not need to be confirmed at order time. The CRL Jackson concealed bodies are ordered by degree of swing and hold-open function instead, for example the 20-101M-03 at 90 degrees no hold-open and the 20-101M-01 at 105 degrees no hold-open.
How fast can I get the Dormakaba RTS31 105 NHO SZ2 8563 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Dormakaba RTS31 105 NHO SZ2 8563 come with a warranty?
Absolutely. The Dormakaba RTS31 105 NHO SZ2 8563 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Dormakaba RTS31 105 NHO SZ2 8563?
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