Door Damper Function Test
This procedure defines a repeatable method for verifying the closing force and timing of hydraulic or pneumatic door dampers. Proper function ensures door closure complies with building codes, reduces risk of pinch injuries, and extends damper service life.
The purpose of this test is to verify that the door damper applies a consistent closing force and speed within the manufacturer’s specified tolerance. A functional damper prevents doors from slamming (noise hazard) or failing to close fully (security & energy loss). Regular function testing also identifies internal seal wear or hydraulic leaks before they cause a full failure.
This SOP applies to all hydraulic and pneumatic door dampers installed on pedestrian doors, fire doors, and light industrial access doors within the facility. It covers function testing of dampers rated for closing force between 20 N and 200 N and closing times between 2 and 30 seconds (per 90° of swing). Excludes heavy-duty industrial blast doors and sliding door mechanisms.
- Lock out the door’s power source (pneumatic/hydraulic) before disconnecting any lines. Use a verified LOTO tag and padlock per CSA Z460.
- Wear safety glasses and cut-resistant gloves when handling damper components or adjusting fasteners under tension.
- Keep hands and fingers clear of the door’s hinge side during cycling. Use the provided force gauge attachment point – never hold the door edge bare-handed.
- Doors exceeding 45 kg require two-person handling or mechanical lift assist. Follow manual lifting guidelines (NIOSH equation).
- Digital force gauge (0–200 N, ±1%), with door-edge attachment hook
- Stopwatch or smartphone timer (accuracy ±0.1 s)
- Torque wrench (range matched to damper adjustment screw specs)
- Hex key set (metric & imperial) / screwdriver set (Philips & slotted)
- Lint-free cloth & degreaser (isopropyl alcohol 70%)
- Manufacturer datasheet for specific damper model
- Pen and test log sheet or digital tablet