Door return mechanisms DOOR CLOSER RYOBI D-3550 JAPAN RYOBI D3550 Fire-Resistant Door Return Spring Mechanism (No. 2–No. 3–No. 4–No. 5–No. 6) Branded Japanese Ryobi fire-rated door return spring mechanism of top construction quality and performance. View
Door return mechanisms RYOBI D-2050T Door Return Spring Mechanism with Track-Rail Arm 360-019 RYOBI D-2050T Fire-Resistant Door Return Spring Mechanism with Track-Rail Arm Suitable for metal, wooden, and glass doors. Equipped with an anti-vandalism arm mechanism. Adjustable backcheck from 60° to 105°. Closing force: No. 3 – for door leaf width up to 95cm. Tested for 500,000 operating cycles. Color: Silver. View
Sktlight mechanism Smoke extraction systems - Fire detection and fire protection 372-007 Smoke and heat extraction systems are an integral part of preventive fire protection. In the event of a fire, the key requirement is maximum reliability of the smoke extraction system and rapid smoke removal. At the same time, they ensure daily ventilation for the desired supply of fresh air. View