Door Closer

Company Profile

Dorrenhaus is an expert in production of UL and CE certified door closer which stands for the highest standard you could find in China or even globally. Every single piece of our product is only released in the market after the most strict inspections starting from raw material to packaging details. Our ANSI/BHMA grade products are the most popular in the North America markets including mainly the USA and Canada.

Why Choose Us

01/

High Quality
The models with ANSI/BHMA certificates come with delay action functionality as option and meet ADA requirements. We have also CE certified products oriented for European markets which were manufactured according to EN1154 standard. All of our door closer products are non-handed.

02/

Advanced Equipment
Six complete production lines with annual output of 1.5 to 2.0 million sets.Two complete door closer assembling lines, max. 12,000pcs per day.

03/

Certificate
Passed European & China ISO9001:2015 QMS Certification.

04/

Professional Team
Every single piece of our product is only released in the market after the most strict inspections starting from raw material to packaging details. Our ANSI/BHMA grade products are the most popular in the North America markets including mainly the USA and Canada.

What is Door Closer

Door closers are mechanical devices that close doors. Typically the door closer will close the door after someone opens the door or after after the door was opened via an automatic door opener.
For storm and screen doors, there is an additional door closer type. Storm and screen door closers are typically pneumatic instead of hydraulic pistons. Pneumatic door closers use air and springs to close the door. Storm door closers have a small metal washer on the rod itself which allows you to keep the storm door open when you are looking to move things in or out of the property. Newer storm door closer models now have a button that actuates the door open feature to make it easier to use.

Benefits of Door Closer

Stop slamming doors
This door closer comes with hold-open function perfect for a variety of residential doors and walkways. Fully Adjustable Dual Valve Closing & Latching Speed Control with Door Opening Angle of Up To 180 Degrees, Sweep Speed Control Valve, Tri-Packed Arms, Pressure Relief Safety Valve - Internal Hydraulic Fluid Reduces Adjustment During Climate Seasons.

Modern & slick design
Advanced technology door closer and the sexiest and most slick piece you have ever seen in this category. Made from high quality metal. Ideal For doors weighing between 154 and 198 pounds. Don't settle for old fashioned ugly door closers! Go for Smart operator with smooth, slow and quiet opener.

Universal mounting
Right or Left Swing Doors, up to 180° opening. Hydraulic operated. Works with any type of doors - Wood/Metal or Indoor/Outdoor. Parallel Arm installation compatible. Bracket is sold separately.

Easy installation
Each of our door closure comes with a detailed guide that includes a fitting template and required hardware parts, saving you time and a trip to the general contractor.

Type of Door Closer

01/

Overhead Door Closers
Overhead closers are the most common and are widely used in commercial properties. For example, conference doors and interior office doors are typically affixed with automatic door closers. The three most common types of overhead door closers installed are.

02/

Concealed Door Closers
This style of home closer is installed in the door or frame to keep it concealed. They provide a more aesthetic appearance to the door as they are not really visible when the door is closed. They are available on the market in spring-loaded or hydraulic versions and are often used for interior doors as they are fairly light.

03/

Floor Spring Door Closers
Floor spring closers are typically used on glass doors and are installed on the floor to keep them hidden. The rod in the closer is mounted underneath the door and is used to control the closing action. These are mainly used in upscale commercial properties as they have the most attractive appearance. They also have an open setting so they can remain open.

04/

Surface-Mounted Door Closers
Surface-mounted closers are manufactured in such a way that they can be mounted inside the door frame with a rod at the back of the door. They are small enough to match the color of the door.

How To Choose The Right Door Closer

A door closer comes in different spring power sizes, colored finishes, closer body types, door cycle durability, mounting types, and testing certifications. All these factors must be considered in order to purchase the right door closer for your door application. Choosing an incorrect door closer could result in thousands of dollars in damage to your door. For example, an undersized door closer installed on a large commercial door can cause the door closer seals to compromise and leak; as a result the hydraulic fluid or oil from the door closer can leak all over your door, essentially staining and destroying your door.

Door Size
A door closer is hydraulic mechanical device used to control the closing swing of a door. They are mainly used on commercial doors but can be found on some residential home doors. Commercial door closers use internal springs that compress when the door is opened and decompress when the door is closing. The spring essentially powers the door closed. The heavier or bigger the door is, the bigger the spring required.
Door Closer Mounting
Door closers can mount in 3 ways: standard, top jamb, and parallel arm. Each method provides it's own benefits. When choosing which method you plan to mount the door closer always consider the space around your door.

Door Closer Functions
All door closers include two basic valve speed adjustments on the door closer body:
Closing Speed Valve

This is the main speed valve that controls the speed of the door closing up until the last 10 to 12 degrees.

Door Closer Fire Rating
The door closer device must be listed as UL10c for fire protection. You can easily check if your door is a fire door by opening the door and looking for a fire label on the hinge side of the door. See illustration below for an example of a fire rated door. If the door is fire rated, the door closer must be UL10c listed. A fire door will have a plate within the door for reinforcement. All Liberty door closers are UL10c listed for installation on fire rated doors.

Door Closer Usage
The frequency that the door is used should always be considered. As common sense tells us, a storeroom door would not be opened as much as the same building's front entry doors. Door closer grades are listed to help identify how heavy duty a door closer is. A door closer is given a grade based on how many cycles that particular door closer completed.

Five Ways To Install Door Closers

Standard installation
The body of the door closer is installed on the side of the sliding door, and the support arm is installed on the door frame. This installation method is suitable for narrow door frame, there is not enough space to install the door closer. This installation also applies to the direction of the door open without obstacles door open to a large enough angle, the door closer will not hit the foreign object.

The upper door frame installation
Door closer is installed on the push door side, the support arm is installed on the door. This type of installation is suitable for the door frame is wide, there is enough space to install the door closer. Compared with the standard installation, this installation is suitable for opening the door in the direction of the wall and other obstacles. Compared with the standard installation, this installation method of closing force is larger, suitable for larger and heavier doors.

Parallel installation
Door closer is installed on the side of the push door, parallel plate is installed on the door frame. This installation is suitable for door frame is very narrow, or almost no door frame you according to this way after installation, because there is no protruding connecting rod and rocker, so more beautiful. Compared with the standard installation, this installation is suitable for opening the door in the direction of the wall and other obstacles. Compared with the standard installation, the closing force of this installation is smaller.

Concealed installation
This installation method applies to hidden door closers, installation methods and slide rail installation the same. Comparison with the first three installation methods, this installation method's closing force is the smallest. According to this way of installation, the door is in the closed state without exposed parts, so the most beautiful. This installation method is the most complex, the best need for professionals to install. This installation requires a large gap with the door frame, generally 10MM (or the installation of the upper part of the door to remove the material to increase the gap). The thickness of the door needs to be more than 42MM.

Slide rail installation
General door closer installed in the door, slide rail installed in the door frame. Door closers can be on both sides of the door. Comparison with the first three installation methods, this installation method to close the door force is minimal. In accordance with this way after installation, because there is no protruding linkage and rocker, so more beautiful.

Location of Closer on the Door

Regular Arm – The closer is mounted on the pull side or the door. The arm is attached to door frame face. Generally used on interior doors.

Top Jamb – The closer is mounted on the frame face above the door on the push side of the door. The arm is attached to the top of the door (top rail). Generally used on doors with narrow top rail, i.e. aluminum and glass “storefront” doors.

Parallel Arm – The closer is mounted on the push side of the door. The arm is attached to a special Parallel Arm Bracket that is then mounted to bottom of frame stop. Arm is “parallel” to the door, therefore able to endure mischievous abuse as in schools. Generally used where aesthetics are important and for locations where ceilings are flush with the doorway.

How to Maintain Door Closer

Door closer maintenance: Door closers are often simple devices that can be expected to show no problems for decades. However, system operators or facility managers must still take appropriate precautions to maintain their safety and longevity. This starts with the installation process and must be done by a qualified technician. After that, the most common and basic types of maintenance on door components include lubrication, adjustment, alignment, and weather sealing.

Even newer and higher quality door closers, with or without frequent use, are advised to follow a planned maintenance routine based on criteria such as location, climate, and door closer type. During this process, it is important for the technician to consider the purpose of the building. For example, nursing homes and gyms will have different needs: nursing home residents may need less resistance than their facilities when opening doors. Therefore, the best practice is to adjust the door closer with these sensitivities into account, and modify the resistance as needed.

If equipment staff cannot resolve any violations during routine inspections, assistance from a professional maintenance team must be obtained to resolve the issue. Safety and comfort are a top priority, and going the extra mile for a well-maintained property will help improve safety and comfort.

Our Factory

Certificate

FAQ

Q: What are the benefits of door closers?

A: Controlled closing prevents slamming and injury and allows people to move through at their own pace. Door closers also prevent doors from being opened too quickly, most notably in windy locations where the door may be pushed opened or slammed closed due to the enviroment. This also prevents injuries and door damage.

Q: Where do you need door closers?

A: Conclusion. Fire door closers are a simple but crucial solution to reducing the risk of fire and smoke spreading. Installing the correct overhead door closer or fire door retainer will make sure that your fire doors are closed when needed, restoring the required fire barrier within the building.

Q: Do door closers push or pull?

A: A door closer can be mounted on the push or pull side of the door. The push side of the door means the door will swing away from you when opened. When the door closer is mounted on the pull side of the door, the door swings toward you when opened.

Q: Do I need door closers?

A: All fire doors should come with a closer. These are the metal arms that you see above a door allowing the door to swing closed – in a measured manner – at all times.

Q: Can door closers stay open?

A: Hold-open door closers will stay open after the door passes the 90 to 110-degree point. You can override this function by simply pushing the door toward the closed position. The closer will start closing the door automatically.

Q: Do door closers act as door stops?

A: No, door closers have a back check function that can be adjusted to stop the door before the door hits the wall. If it doesn't work them the closer needs to be looked at. The function of a closer, after all, is to control the door.

Q: Do door closers prevent slamming?

A: MODERN door closers help to make any home a quieter and more comfortable place in which to live. They not only prevent slamming and banging of doors, they also help to save fuel and prevent drafts by automatically closing doors which might have been carelessly left open.

Q: Do locksmiths install door closers?

A: While it is possible to install a door closer yourself, we recommend seeking the assistance of a professional locksmith to ensure proper installation. Improper installation can result in problems with the door closer's functionality, such as the door not closing properly or the door closer leaking oil.

Q: What is the problem with door closers?

A: Outdoor door closers are prone to rust over time where they face corrosive elements like temperature fluctuations and humidity. Initially, they may function adequately but will likely need regular lubrication and adjustments. As these door closers deteriorate, oil leakage becomes a common issue.

Q: What is another name for a door closer?

A: Also known as rack and pinion closers, overhead door closers are one of the most common closers out there. There are many variations of size, strength and ways to position the closer. You also have the choice of adjustable closing speed, latch action, delayed action and backcheck.

Q: How do you stop a door closer?

A: Make 1.25-1.5 turns counterclockwise and open the door to make sure it comes to a steady, hard stop. At about 75 degrees, the door should start to slow down so that it does not slam into the surface behind or get caught by the wind. Turning the valve counterclockwise will make the door open wider.

Q: Are door closers required on flat doors?

A: Door closers are required on flat doors to ensure that they are shut when not in use. If door closers are not installed, or have been removed or deactivated, the door may be open in a fire. This will allow smoke and flames to spread throughout the building.

Q: What is the life expectancy of a door closer?

A: In summary, a grade 1 door closer properly mounted and adjusted will easily have a life span of 30 or more years. Similarly, a grade 2 door closer should last atleast 10 years, and a grade 3 door closer should last 3 years. Many factors can affect the door closer's life span.

Q: Does cold weather affect door closers?

A: How Winter Weather Affects Door Closers. Whether your closers are surface based or concealed; operated with hydraulics and springs, cold weather affects them. When the temperature drops, oil can congeal and make your door closing take longer. Any door closer affected in this way will need to be adjusted.

Q: How long does it take to install a door closer?

A: It takes about 45 minutes to replace a conventional door closer, or an hour to do a fresh installation. Door closers generally come in two finishes: Duranotic and Aluminum. Duranotic is a dark brown color. You should choose whichever one matches your other door hardware.

Q: Are all door closers the same?

A: There are lots of different types on the market and you will need to make sure that the one you wish to purchase has the qualities you require (such as being fire rated). Some concealed closers can control closing and latch speed like overhead door closers.

Q: Do door closers push or pull?

Q: Where do you need door closers?

Q: Can you put a door closer on the inside of door?

A: Exterior door closers can be installed outside. However, where possible, door closers should be mounted on the inside part of the door. This will make sure door closers have a longer life span as they are not exposed to the changing weather conditions.

Q: How many types of door closers are there?

A: There are six common types of commercial door closers shown below. The most common door closer used in commercial buildings today are the Modern Type closers, with or without the cover. These closers all work in essentially the same way. As the door is opened, a spring is loaded with tension.

We're professional door closer manufacturers and suppliers in China, specialized in providing the best customized service. We warmly welcome you to buy door closer made in China here from our factory.