Technical requirements for door closers (fire door closers)
Performance requirements
After the load performance product is tested under load, there should be no fracture or deformation in the shape and accessories.
Positioning performance of door closers Door closers with positioning devices. The door should be able to stop at a specified position or area and be easy to disengage.
Closing time When the speed control valve is fully closed, the closing time is not less than 40s; when the speed control valve is fully opened, the closing time is not more than 3s. The opening torque, closing torque, efficiency, and applicable door quality should all meet the requirements of Table Bu 16.
Seepage and leakage of door closers The oil storage parts should not have any seepage or leakage.
Running performance The product should run smoothly and flexibly when used.
Door opening buffer performance Products with door opening buffer performance. After the door is opened to 650, there should be obvious slowdown.
Delayed closing performance Products with delayed closing performance. The elapsed time from the door opening angle of 900 to the end of the delayed door opening angle of 600-750 should be greater than 10s. The extension angle of the delayed area cannot be less than 60' the door opening angle.
The effect of temperature changes on the closing time is when the temperature becomes -15°C and 40°C.