Automatic Door Closer

An automatic door closer is a mechanical-hydraulic device that uses a spring and fluid system to close a door automatically after it's opened, controlling the speed and ensuring it shuts securely, preventing slamming and improving security, fire safety (by keeping fire doors shut), and energy efficiency (by keeping conditioned air in). Key features include adjustable closing/latching speeds, various mounting styles (overhead, floor spring, concealed), and options like hold-open functions for convenience, though not for fire doors.