The :contentReference[oaicite:0]{index=0} is a heavy duty floor spring door closer system designed for robust door control in commercial and residential installations. Concealed in the floor for a clean look, the BTS 80 system supports single-leaf and double-leaf doors with weights up to 300 kg, delivering consistent, temperature-independent closing and controlled movement. :contentReference[oaicite:1]{index=1} Engineered with a proven, reliable mechanism and interchangeable spindles for flexible installation across left or right, single or double action doors, this floor spring enhances door usability while maintaining long-lasting performance. Its concealed design and adjustable features make it suitable for entranceways, lobbies, and interior heavy-traffic doors. :contentReference[oaicite:2]{index=2} Key Features: • Concealed floor spring system for elegant door hardware • Supports doors up to 300 kg with smooth closing action • Works with single and double action doors • Interchangeable spindles for flexible installation • Durable and consistent performance for high-traffic environments
