Dörrstängaren

Dörrstängaren, often referred to as a door closer, is a mechanical device that controls the closing of a door. Its primary function is to ensure that a door closes smoothly and securely, preventing it from slamming shut or being left ajar. This is achieved through a hydraulic or pneumatic system that regulates the speed and force of the closing action.

Door closers are commonly found on a variety of doors, including those in commercial buildings, public spaces, and even some residential settings. They are essential for maintaining security, preventing drafts, and ensuring fire safety by guaranteeing that fire doors close properly. Different types of door closers exist, each designed for specific applications and door weights. Some are surface-mounted, attaching directly to the door and frame, while others are concealed within the door or frame for a more aesthetic appearance.

The operation of a typical door closer involves a spring-loaded arm and a hydraulic cylinder. As the door is opened, the arm compresses the spring and forces hydraulic fluid through a series of valves. When the door is released, the spring's tension and the fluid's resistance work together to guide the door closed at a controlled rate. Adjustable features on most door closers allow for fine-tuning of the closing speed, latching speed, and even backcheck, which cushions the door's swing as it nears the fully open position. This adjustability ensures optimal performance and user experience across different environments and needs.