Door closers are door hardware that allows the door to close automatically. They are also called hydraulic door closers or automatic door closers. The door closing speed is adjustable through the adjusting valve. Depending on the demand, there are two speed options, closing and latching.
Depending on the design, door closers can be classified based on where they are installed, how they are structured, and whether the closing force is adjustable.
Based on the installation position, door closers can be classified into surface-mounted closers, overhead concealed closers, and floor springs. Surface-mounted and overhead concealed door closers are usually installed on the door top or the door frame. An overhead concealed door closer is an invisible structure installed inside the door or the door frame. Floor springs are ideal for all glass entrance doors, patch-fitting doors, and heavy-duty doors.
Door closers can also be classified based on their mechanism. The Rack & Pinion is the traditional and basic style. The more recent CAM action design features easy opening and powerful latching.
Depending on whether the closing force is adjustable, door closers can be classified into fixed and power-adjustable types. The former has only a single closing force and is not adjustable. The power-adjustable type can be adjusted by moving the installation position or the turning spring. Different models of power-adjustable door closers have different power sizes available.
A small tip. The speed adjustment valve can only adjust the closing speed and can’t adjust the force of closing the door.
Hydraulic and pneumatic door closers are two common types of door closers. In a hydraulic door closer, the spring tension is modulated by hydraulic fluid. In contrast, in a pneumatic door closer, the air pressure control valve controls the opening and closing of the door.
Pneumatic door closers are often installed on doors in the office or residence properties and are shock resistant. Hydraulic door closers are even better than pneumatic door closers in terms of load capacity and shock resistance. The applications of hydraulic door closers are quieter and more versatile. These advantages make hydraulic door closers popular on the market.
When choosing door closers, you need to consider the following factors:4.1.The door closer type
- Whether you need a surface-mounted door closer, a concealed door closer, or a floor spring.
- Whether the door closer should be equipped with a specific mechanism such as a traditional rack and pinion door closer or a cam action door closer.
- Whether the door closer will be mounted on the pull side or the push side of the door (inward or outward opening). How you open the door will determine whether a surface-mounted door closer should be installed with a parallel arm bracket or have a top-jamb installation.
4.3. Building regulations.
Depending on a project’s requirements, a door closer should meet British or American standards, have a CE mark or a UL label, or any other standards.
4.4. The function and option of a door closer
- Fire safety requirements: Look for the fire rating on the door closer.
- Backcheck function: The backcheck is often added to a door closer for a heavy-duty door or for a rooftop door that might be blown open by the strong wind. This function provides a buffer preventing the door from being damaged or hurting a user.
- Hold-open function: A door closer might be equipped with a hold-open arm, a hold-open device to make the door stop in a specific position. The opening angle is adjustable, making it easy for users to pass through the door.
- Delay action: The function delays a door’s closing for 0 – 40 seconds. This function makes a door closer more user-friendly for the elder, children, and disabled people.
- Cover: It is a decoration option, making a door closer look square and giving the whole door a consistent look.
- Finish options: There are several options of coating finish colors to match the door hardware design and color. The track and arm can be done with satin nickel finish, polished nickel finish, and brass finish. These three kinds of finish are popular for interior hardware design.
We also have special coating color except silver, i.g. black, white, matt black, brown, gold for options.
- A pneumatic tool
- A Phillips screwdriver
- A flathead screwdriver
- Allen key
- pencil (for marking)
- For the elbow-arm type:
Separate the nut of the elbow-arm before fixing the door closer body on the door and the arm's shoe on the door frame. Next, attach the parallel arm to the door closer body.
- For the sliding or track type:
Fix the arm to the door closer’s spindle before fixing the door closer’s main body to the door and the track to the door frame.
- For the elbow-arm type:
Use the nut to reconnect the arms. The main arm and the wall must remain at a 90 degrees angle.
- For the sliding track and arm type:
Use a screw to fix the main arm on the sliding track.
Our products have CE, UL, PSB, and CNS certifications, and our factory is also CE certified. In addition, we use inspection equipment approved by CE laboratories in the UK. Each certification unit will send staff every year to audit our factory.
Please contact us by email at [email protected] for professional advice. You can also fill out the inquiry form.