How to Adjust a Door Closer

Some places have constant visitors, and the door has to be closed again and again. If it is an air conditioned room or office, it becomes necessary to keep the door closed. This is the reason many people use door closers. These door closers automatically close the door. The door closer operates on a hardware, which has a hydraulic based mechanism. You can control the speed of the door closing automatically, if you know how to adjust a door closer. Adjusting a door closer will help you control the speed of the door: it can also hold the door stable before closing, etc. You can adjust it as you wish. However, if you do not know how to adjust a door closer, read the instructions given below that will help you adjust your door closer.

You need a screwdriver and an Allen Wrench to adjust any kind of door closers. Once you have these equipments, you can adjust the door closer.

How to adjust a door closer?

Spring Power:

  • First step is to set the spring power of the door closer. The setting for this varies between 1-6 for almost all door closers. ‘6′ is the strongest setting for the spring. The average setting is ‘3′. The nut placed on the adjuster has to be turned for this.
  • This setting is must for the adjuster to perform well. Many who install this door closer fail to set this spring power correctly, which results in improper functioning of the door closer.
  • For larger doors or heavy glass doors, the spring power should be high. Do not opt for average spring power; opt for higher power than 3. For smaller and lighter doors, you can opt for power of 3 or 2. The installation manual that you get along with the door or door closer will help you decide the right spring power.

Closing Speed:

  • To adjust the closing speed of the door, check the speed of the door by opening it completely and when it closes back. The speed at which the door closes is known as the ‘main or closing’ speed.
  • This closing speed can be adjusted with the small valve on the door closer which is marked with the alphabet ‘C’ or ‘S’. This valve when turned clockwise will decrease the closing speed, and when turned in anti-clockwise direction, increases the closing speed.

Latch Speed:

  • The speed just 10-15 degrees before the door closes, is known as the ‘latch speed’. To adjust this set, turn the ‘L’ valve. Using an Allen Wrench, turning it in clockwise direction will lead to slow latching and turning it in anti-clockwise direction will lead to fast latching.
  • The ideal latching speed should be 3-7 seconds.

Back Check:

  • This is the distance of the door from the wall or furnishings when it opens. Turning the valve on the back check will help you to adjust the limit till which the door opens.

Delayed Closing:

  • This is optional. You can choose if you want a delayed closing feature for your door. It holds the door stable before the door starts closing. The valve for this is also adjusted with the Allen wrench.
  • Turn it in clockwise direction to increase the delay and counterclockwise to decrease the delay.

Using Allen wrench and screw driver, follow these instructions, and adjust your door closer as per your convenience.


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