Door closers are mechanical or hydraulic devices that automatically shut doors to prevent slamming, increase safety, and ensure security. Common types include surface-mounted hydraulic closers for heavy doors and spring-loaded hinges for residential use. They feature adjustable sweep and latch speeds to control the closing force.
Key Features and Types
- Hydraulic Closers: Use oil-filled cylinders to control speed, preventing slamming.
- Spring Hinges: Simple mechanism, often used on fire-rated doors, though they may not always latch fully.
- Automatic/Punch-Free: Often plastic-encased, cable-driven units suited for light, interior, or sliding doors.
- Adjustability: Most closers have two valves—one for general swing speed (sweep) and one for final closing speed (latch).