What Is a Delayed Action Door Closer?
A standard closer starts closing the door as soon as it is released. A delayed action door closer has an extra hydraulic valve that greatly slows the first part of the closing cycle, so the door pauses near the open position for several seconds before the normal closing sweep begins. It does not lock the door open: the door always closes on its own.
Where Delayed Action Helps Most
- Hospitals and clinics: beds, gurneys, IV poles and wheelchairs. See hospital door closers.
- Senior living: residents with walkers and rollators. See senior living door closers.
- Schools and libraries: carts, strollers and groups of students.
- Hotels and restaurants: luggage carts, room service and trays.
- Back-of-house and loading areas: hand trucks and pallet jacks.
Delayed Action and the ADA
Delayed action adds time before the closing sweep starts; it does not replace the ADA closing speed rule. Under the 2010 ADA Standards, the door must still take at least 5 seconds to move from 90° to 12° from the latch. Many facilities set 5–15 seconds of delay on primary corridors, depending on the users.
Delayed Action on Fire Doors
Delayed action is permitted on fire-rated doors when the closer is listed for that use, because the door still closes and latches by itself. A hold-open is different: it keeps the door open indefinitely and is only allowed on fire doors when released automatically by the fire alarm. The DRIWON DN-9500 is UL listed and 3-hour fire rated on rated assemblies; confirm the listing for each opening.
Setting delayed action: adjust the backcheck first, then the delayed action valve, then closing speed and latch speed. Our
adjustment guide walks through each step.
Which DRIWON Closers Have Delayed Action?
Both models. The cast iron DN-9500 is the extra heavy duty choice for corridors, stairs and high-abuse doors; the aluminum DN-8220 suits interior doors with moderate traffic.
Read more: ADA door closer requirements and door closers for senior living.
DRIWON DN-9500 Specifications
| Model | DRIWON DN-9500 extra heavy duty commercial door closer |
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| Certification | ANSI/BHMA A156.4 Grade 1; UL listed |
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| Fire rating | 3-hour fire rated when installed on a rated door assembly |
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| Power size | Adjustable 1–6 |
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| Door weight | 44–440 lbs (20–200 kg) |
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| Door width | 23"–59" (58–150 cm) |
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| Body / arm | Extra heavy duty cast iron body, wrought steel arm, heat-treated piston |
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| Control | Hydraulic, with delayed action and secure positive latch |
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| Finish | Corrosion-resistant powder coat, silver or black |
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Need the lighter-duty option for interior doors? See the DRIWON DN-8220 Grade 1 door closer. Full details on the DN-9500 product page.
