Door Closer Types

Adjusting the speed of a door closer is a common maintenance task that ensures the door closes smoothly, safely, and in compliance with building codes (e.g., fire safety requirements). Most hydraulic door closers have two main adjustment valves to control speed: one for the “speed” phase (the main closing motion from fully open to ~15°) and one for the “latch” phase (the final slow closing from ~15° to fully latched). Below is a step-by-step guide, including safety tips and key notes.

1. Prepare tools: Get a screwdriver or hex key ready.
2. Identify the adjustment screws:  One is marked “SPEED “, which controls the closing speed in the first half of the door’s closing process. The other is marked “Latch” or “SPEED 2”, which controls the closing speed in the second half.
3. Adjust the speed: Turn the “SPEED ” screw clockwise to slow down the door closing speed, and counterclockwise to speed it up. Similarly, turn the “SPEED 2” or “Latch” screw clockwise to slow down the speed, and counterclockwise to speed it up. Each adjustment should be a small increment, such as 1/4 turn.
4. Test the adjustment effect: After each adjustment, test the door closing speed to see if it meets your requirements. If the door closes too fast or too slow, continue to fine – tune the screws until you are satisfied.