Surface Mounted Door Closer, Suitable for 45~60kg Door

1. How do I choose the right surface mounted door closer?

> Door Size and Weight: Heavier and wider doors require a closer with a higher"power size"

   (e.g., EN 3 for a standard interior door, EN 4-6 for a heavy exterior or fire door).

> Application Type: Determine if you need a surface-mounted, concealed, or floor spring closer based on your door type and aesthetic needs.

> Usage Frequency: High-traffic areas (like offices or hospitals) demand heavy-duty closers with higher cycle ratings (e.g., 500,000+ cycles).

> Fire Rating: Fire doors must use a closer that meets fire safety standards (e.g., UL 228 or BS EN 1154) and provides a minimum power size.

2. How do I maintain a door closer?

> Check for Leaks: Inspect the closer body for oil leaks. If oil is leaking, the seals have failed and the closer needs to be replaced.

> Tighten Screws: Periodically check and tighten all mounting screws on the closer body and arm. Loose screws are a common cause of poor performance.

> Lubricate Moving Parts: Apply a silicone-based lubricant to the hinge pins and the arm pivot points every 6-12 months.

> Clean the Unit: Keep the closer and arm free from dust and debris.

> Locate the main speed/sweep speed adjustment screw.

> Turn the screw counterclockwise by a quarter turn to increase the closing speed .

Note: Cold weather can cause the hydraulic fluid to thicken, making the door close slower than usual. This may require a seasonal adjustment or, in extreme climates, the use of a closer with all-season hydraulic fluid