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DORMA 700/900 Series
700 Series - Standard duty stops/holders
900 Series - Heavy duty stops/holders
Functions
S - Stop Only
F - Friction Stop
H - Stop/Hold
Stop only units (S function) are designed to limit the degree of door swing while providing a cushioned stop. These units are a good choice for use on labeled fire doors where hold open is prohibited.
Stop/Hold units (H function) function like stop only units with an added selective on/off hold open feature. An inconspicuous slot screw on the face of the track channel allows field engagement/disengagement of hold open. Stop/hold is recommended where non-labeled doors must be held in the open position.
Friction/Stop (F function) units provide a cushioned limiting stop and adjustable friction stay. The accessible screw on top of the slide shoe allows field adjustment of the friction. This option provides a method of holding non- labeled doors at multiple positions without readjustment. Available in 700/710 Series only.
Stops and Holders
With its 700/900 Series, DORMA offers a line of versatile stops and holders. This line complements the existing full range of door closers, providing a total door control system.
- Durable and visually pleasing
- Surface applied or concealed
- Highest quality materials
- Different finishes available
- Several unit types available
Product details
Features
Durable and visually pleasing
Separate stops and holders are the preferred method of limiting door swing. They are ideal where the use of wall or floor stops is precluded. The 700/900 Series high quality units are both durable and visually pleasing.
Highest quality materials
DORMA stops and holders are designed and manufactured from the highest quality materials to provide optimum service under heavy-duty use.
Different finishes available
A standard two-coat paint finish is the best choice to match sprayed DORMA door closers. Optional plated finishes are also available.
Several unit types available
Stop only units are designed to limit the degree of door swing while providing a cushioned stop. These units are a good choice for use on labeled fire doors where hold open is prohibited. Stop/Hold units function like stop only units with an added selective on/off hold open feature. Stop/hold is recommended where non-labeled doors must be held in the open position. Friction/Stop units provide a cushioned limiting stop and adjustable friction stay. This option provides a method of holding non-labeled doors at multiple positions without readjustment. Available in 700/710 Series only.
Product downloads
Manufacturer Resources
Product Specs
- Series:
- 900 Series
- Product Group:
- Door Controls
- Product Subgroup:
- Overhead Stops and Holders
- Product Type:
- Overhead Stops and Holders - Concealed Mount
- Subcategory:
- Holders and Stops
- Commercial/Residential:
- Commercial
- Tags:
- 900s overhead stop
- Product Model:
- 900 and 910
- Hold Open Feature:
- Yes
- Product Category:
- Door Controls
- Department:
- Door Hardware
Dormakaba 902S 689 – Frequently Asked Questions
1) Can I use a DORMA 900 Series stop and hold unit on a labeled fire door?
Order the stop only (S) function for a labeled fire door. DORMA calls the S function a good choice on labeled fire doors where hold open is prohibited, since it limits the swing and cushions the stop without ever holding the leaf open. The stop/hold (H) function is the one recommended for non-labeled doors that need to stand open. Both functions are offered in the 900 heavy duty line, so a building with fire rated openings and ordinary interior doors can run the same series throughout and just change the function code per opening.
2) Can the hold open on a DORMA 900 Series stop be turned off after it is installed?
Yes, on H function units, and without pulling the unit off the door. A slot screw on the face of the track channel engages and disengages the hold open in the field, so an opening where hold open later becomes a problem can be switched to stop only behavior on site. That flexibility only exists if you buy the H function up front. Stop only (S) units have no hold open feature at all, so if there is any chance the door will need to stand open, specify H when you order.
3) The door is prepped for a concealed overhead stop. Can a Glynn-Johnson 70 Series or a Norton Rixson 10 Series drop into it?
No, those are surface applied units, not concealed ones. The Glynn-Johnson 70 Series is a heavy duty surface overhead door holder and stop with an 85 to 110 degree hold-open range, the Glynn-Johnson 79 Series is an extra heavy duty surface unit, and the Norton Rixson 10-236 Checkmate is a surface door stop and holder with an adjustable hold-open feature. They fasten to the face of the door and the frame rather than into a concealed channel, so a door already cut for a concealed unit needs a concealed replacement such as the DORMA 900 in concealed mounting, the Glynn-Johnson 100 Series heavy duty concealed, or the Norton Rixson 1 Series Checkmate concealed. If the opening can take a surface unit, the DORMA 900 is also built in surface applied mounting.
4) What is the closest heavy duty concealed overhead stop and holder to the DORMA 900 Series from another manufacturer?
The DORMA 900 Series is the heavy duty stop/holder line, offered in concealed mounting with stop only and stop and hold functions. The closest cross-brand units are the Glynn-Johnson 100 Series, a heavy duty concealed overhead holder and stop that is multi-function and non-handed; the Norton Rixson 1 Series Checkmate, a heavy duty Grade 1 concealed door stop and holder with a 110 degree opening; the Sargent 690, a heavy duty overhead concealed door stop/holder with ANSI Grade 1 compliance; and the ABH 1000A Series, a heavy duty concealed mount overhead stop and holder with field-adjustable opening control. Each of those is a concealed unit rather than a surface applied one, so they sit in the same mounting class as the concealed 900.
5) I need to change how far the door opens after the stop is installed. Which overhead stop allows that?
Look at units published with adjustable opening control. The ABH 1000A Series is a heavy-duty concealed mount overhead stop and holder with field-adjustable opening control, and the ABH 1000RA and 1000SA Series are heavy-duty concealed stop and holders with adjustable opening control. The Norton Rixson 10-336 is a standard duty overhead stop with adjustable opening control and is listed Grade 1. The field adjustment on the DORMA 900 is a different one: an inconspicuous slot screw on the face of the track channel turns hold open on or off, and the unit is matched to the opening by ordering the door width range, 24 to 34 inches, 34-1/8 to 44 inches, or 44-1/8 to 54 inches.
6) Which concealed overhead stop works on a labeled fire door where hold open is not permitted?
Order a stop only unit. The DORMA 900 stop only (S function) limits the degree of door swing with a cushioned stop and is called out for use on labeled fire doors where hold open is prohibited; the stop and hold (H function) version adds a field-engageable hold open and is intended for non-labeled doors, so it is the wrong pick for that opening. Cross-brand, the ABH 1000 Series is a heavy-duty concealed mount overhead door stop with fire rating and is a stop, not a holder. The Glynn-Johnson 100 Series heavy duty concealed unit is multi-function, so the function has to be specified as stop only when ordering.
7) Concealed or surface applied overhead stop, which should I use on a commercial door?
The DORMA 900 heavy duty line, models 900 and 910, is built both ways, so you can pick the mounting without leaving the series or changing finish families. Concealed units are mortised into the top edge of the door and the frame soffit, so little shows with the door closed, but the door and frame have to be machined for them. That is a decision made before the doors are hung, or during a full replacement. Surface applied units mount to the face of the door and the underside of the frame head, which is the practical choice on an existing opening you do not want to cut into or on a hollow metal frame already prepped for other hardware.
8) Does the DORMA 900 Series hold a door open at any position along the swing?
No. The 900 heavy duty units come in stop only (S) and stop/hold (H), and the H function is a selective on/off hold open, not a multi position stay. The friction/stop (F) function, which gives a cushioned limiting stop plus an adjustable friction stay that holds a non-labeled door at multiple positions without readjustment, is offered in the 700/710 Series only. If a maintenance crew needs the door to sit wherever they leave it, F is the function to look at, and it is not on the heavy duty 900.
9) When do I need an overhead stop instead of a wall stop or floor stop?
Overhead stops like the DORMA 900 heavy duty units are the answer when a wall or floor stop cannot be used, and DORMA states that outright: separate stops and holders are the preferred method of limiting door swing where wall or floor stops are precluded. In practice that means doors that swing into open corridor with no wall behind them, glass fronts and storefront returns, and floors where a dome stop is a trip hazard or a cleaning problem. The stop also takes the abuse at the top of the door rather than at the leading edge, which is where a wall stop keeps punching through drywall on high traffic openings.
10) Do I really need a heavy duty overhead stop, or will a lighter one do on an interior office door?
The 900 is DORMA's heavy duty line, built for optimum service under heavy duty use; the 700 Series is the standard duty equivalent in the same family. Heavy duty earns its keep on entrances, stairwells, corridors and anything the public pushes on all day. For a low traffic non-labeled interior door, ZenSupply also carries lighter concealed units: the Glynn-Johnson 410 Series in medium duty, the Sargent 1530 concealed stop/holder with a 110 degree opening, and the Don-Jo 3023 and 3024 standard duty concealed stops in satin stainless, sized for 30 inch and 36 inch doors.
11) My doors are different widths across the building. Do overhead stops cover a width range or is each one sized to a single door?
It varies by product. The DORMA 900 is ordered in three door opening ranges - 24 to 34 inches, 34-1/8 to 44 inches, and 44-1/8 to 54 inches - so three size selections cover doors from 24 up to 54 inches. The Don-Jo concealed overhead stops are sized one door per part number: the 3023 is for 30 inch doors and the 3024 is for 36 inch doors, both standard duty in satin stainless steel. On a mixed-width building, the range approach means fewer part numbers on the order and fewer to stock.
12) Can I standardize on one overhead stop across a building with different door sizes and fire ratings?
Yes, and that is how the DORMA 900 heavy duty line is set up for a commercial property. Three door width bands cover 24 to 54 inch leaves, both concealed and surface applied mounting are offered so doors that can't be machined stay in the same series, and the function is chosen per opening: stop only on the labeled fire doors, stop/hold where a door needs to stand open. Hold the finish constant across all of it and the openings match, while your maintenance crew stocks one family of parts instead of four brands.
13) The building hardware is brass and bronze, not stainless. Which overhead stop can match it?
The DORMA 900 is built in 605 bright brass, 606 satin brass, 696 satin brass, 611 bright bronze, 612 satin bronze, 613 oil rubbed bronze, 690 and 695 dark bronze, 691 light bronze, 618 bright nickel, 619 satin nickel, 625 bright chrome, 626 satin chrome, 689 aluminum, and 693 black, and the line is also offered with a standard two-coat paint finish chosen to match sprayed DORMA door closers, with plated finishes optional. By contrast, the Don-Jo 3023 and 3024 concealed overhead stops are satin stainless steel. If the requirement is a bronze or brass BHMA number to match existing lever and closer finishes, the 900 finish list is where to look.
14) Is there a concealed overhead stop that is non-handed so one part number covers both left and right hand doors?
The Glynn-Johnson 100 Series is published as non-handed - one heavy duty concealed overhead holder and stop, multi-function, that serves both hands of door. The DORMA 900 is selected by function (stop only or stop and hold), mounting (concealed or surface applied), the door opening width range, and finish. For a facility standardizing on one stocked item across many openings, the non-handed Glynn-Johnson reduces the selection to duty and finish.
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Does the Dormakaba 902S 689 come with a warranty?
Absolutely. The Dormakaba 902S 689 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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