How to adjust the tightness of the door closer
Door closers are common hardware accessories in daily life and are widely used on doors in homes, offices, shopping malls and other places. Its main function is to control the closing speed of the door to avoid noise or damage caused by rapid closing of the door due to wind or inertia. However, the door closer may become loose or uncomfortable after being used for a period of time, in which case it needs to be adjusted. This article will introduce in detail the method of adjusting the tightness of the door closer, and attach relevant data for reference.
1. Basic structure of door closer
Door closers usually consist of the following parts:
| Part name | Function |
|---|---|
| Hydraulic cylinder | Control door closing speed via hydraulic oil |
| regulating valve | Adjust door closing speed and force |
| spring | Provides power for door closers |
| connecting arm | The body connecting the door and the door closer |
2. Steps to adjust the tightness of the door closer
1.Identify the problem: First of all, it is necessary to clarify whether the door closer is too tight or too loose. If the door closes too quickly, the door closer may be too tight; if the door does not close completely or closes too slowly, the door closer may be too loose.
2.Find the regulating valve: Door closers usually have two regulating valves, one controls the closing speed (Speed Valve) and the other controls the door locking speed (Latch Valve). The regulating valve is usually located on the side or top of the door closer and can be adjusted with a screwdriver.
3.Adjust closing speed: Using a screwdriver, turn the regulating valve (usually the one labeled "Speed") clockwise to increase the closing speed, and counterclockwise to decrease the closing speed.
4.Adjust door lock speed: Door locking speed refers to the closing speed of the door in the last distance. The adjustment method is similar to the closing speed. Turn clockwise to increase the speed and counterclockwise to decrease the speed.
5.Test effect: After each adjustment, the door should be opened and closed several times to test the effect until satisfactory tightness is achieved.
3. Common problems and solutions
| question | Possible reasons | Solution |
|---|---|---|
| Door closes too quickly | Closing speed regulating valve is too tight | Rotate the Speed Valve counterclockwise |
| Door cannot be closed completely | Door lock speed regulating valve is too loose | Rotate Latch Valve clockwise |
| Door closer oil leakage | Damaged hydraulic cylinder seals | Replace seal or entire door closer |
| There is an abnormal sound when the door is closed | The connecting arm is loose or worn | Tighten connecting arm or replace parts |
4. Precautions
1.Moderate adjustment: During each adjustment, it is recommended to rotate the regulating valve slightly (about 1/4 turn) to avoid over-adjustment that may cause the door closer to fail.
2.Regular maintenance: The door closer should be regularly checked to see if the hydraulic oil is sufficient and the connecting parts are loose to ensure its normal operation.
3.Choose the right door closer: Different door sizes and weights require different models of door closers. The following are matching suggestions for common door types and door closer models:
| Door type | Door weight (kg) | Recommended door closer model |
|---|---|---|
| interior wooden door | 20-40 | EN1-EN2 |
| office glass door | 40-60 | EN3-EN4 |
| Shopping mall fire doors | 60-80 | EN5-EN6 |
5. Summary
Adjusting the tightness of the door closer is a simple but patient task. An overly tight or loose door closer can be easily resolved by properly identifying the problem, locating the regulating valve, and making the appropriate adjustments. If you encounter a problem that cannot be solved by yourself, it is recommended to contact professional maintenance personnel to handle it.
I hope this article can help you better understand the adjustment method of the door closer, so that your door can be used more smoothly!
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