Heavy Duty Door Closers
for Factories & Industrial Facilities

Heavy Duty Door Closers for Factories, Warehouses and Production Areas

Industrial doors are heavy, abused and often exposed to dust, vibration, temperature swings and forklift or cart traffic. They also separate areas with different hazards, noise levels or climate. A door that does not close is a safety and efficiency problem. The DN-9500 is built for this: a cast iron body, a wrought steel arm and a heat-treated piston for long life.

• Production area and plant entry doors: personnel doors with constant cycling.
• Warehouse and dock personnel doors: heavy leaves, delayed action for carts.
• Fire separation and stair doors: must self-close and latch.
• Office-to-plant and break room doors: noise and climate control.

Safety, OSHA Exit Routes and Fire Doors

OSHA exit route rules require that exit doors can be opened from the inside without keys or special knowledge, and fire doors in rated separations must close and latch as designed (see NFPA 80). The DN-9500 is UL listed and 3-hour fire rated on rated door assemblies. Closers should never be disabled with a wedge or a hold-open hack: where hold-open is needed on a fire door, use a listed hold-open or magnetic device.

Under the 2010 ADA Standards for Accessible Design (section 404), interior hinged doors must open with no more than 5 lbf, and a closer must be adjusted so the door takes at least 5 seconds to swing from 90° to 12° from the latch. Fire doors are the exception on opening force: the authority having jurisdiction sets the minimum. Always check local code and your AHJ.

Specifying for Plant and Warehouse Projects

1. Survey door weights, widths and rated status.
2. Note environmental conditions: dust, washdown, temperature.
3. Standardize on one closer to cut spare parts inventory.
4. Plan routine inspections as part of safety audits.

For multi-site rollouts, contact us for volume pricing.

Warehouses and Distribution Centers

Distribution centers combine long exterior walls, dock areas and constant forklift traffic. Personnel doors next to dock doors are hit by wind every time an overhead door opens, so they need firm backcheck and enough power to latch in a draft (see exterior door closers). Doors between the warehouse and offices, break rooms or battery-charging areas are often fire rated and must self-close. Wide equipment doors benefit from delayed action.

Dust, Washdown and Temperature-Controlled Areas

Dusty production areas shorten the life of exposed arms and pivots, so wipe down closers on a schedule. In washdown areas, protect closers from direct spray and choose a corrosion-resistant finish. Freezers and walk-in coolers are specialty applications: standard hydraulic closers are not intended for sub-zero rooms, so use hardware rated for the temperature. For the heaviest steel doors see our heavy door and hollow metal door closer pages.

DRIWON DN-9500 Specifications

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.