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Heavy Duty Door Closer

Heavy Duty 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 Commercial Door Closer

Commercial door closers play a crucial role in maintaining security, accessibility, and convenience in various business establishments. With a wide range of options available in the market, it can be challenging to determine which type of door closer is best suited for your specific needs. In this blog post, we will explore the different types of commercial door closers and discuss their features, advantages, and considerations to help you make an informed decision.
Commercial door closers are mechanisms that are installed at the top of the door, or concealed in the floor or header of the door frame, to prevent the door from slamming shut or remaining open. These closers may also help those who struggle to open doors (for example, due to physical handicap), or be designed to prevent doors from opening too quickly or easily.

American Light Duty Door Closer

 

Benefits of Commercial Door Closer
 
Minimal

Commercial closer hinges are crafted to provide reliable self-closing functionality with the simplicity of a traditional hinge. Each hinge is self-contained, free of extraneous moving parts. In fact, Waterson hinges combine commercial door closer, spring hinges, and optional hold open features into one attractive and unobtrusive component.

Versatile

The patented all-in-one hinge design makes them easily utilized on a variety of applications. Utilizing either purely mechanical or hydraulic hybrid designs, sleek hinges are suitable for a variety of interior and exterior applications. Purely mechanical hinges are extremely durable and resistant to temperature changes, whereas hydraulic hybrid design provides soft closing with greater precision control.

Stainless steel

Materials are one of the most important features that need to be considered when it comes to exterior door hardware. This is especially true for ones that are exposed to harsh environments such as chlorinated pools and coastal areas where environmental particles can have a corrosive effect. Unfortunately, self-closing commercial door closers made from stainless steel are hard to find.

Easily maintained

Commercial hinges are crafted with a self-contained minimal design, therefore maintaining them is quite easy. Closing speed and force can be adjusted in minutes by simply using a hex wrench. Nothing needs to be removed in order to access modifiable locations, as the key adjustment screws are easily accessed on the top, bottom, and side of each respective hinge. A contractor can remove old hinges and install as many as twelve doors with Waterson commercial door closers in as little as six hours including all adjustments.

 

Different types of commercial door closers

When it comes to commercial door closers, there are several different types to choose from. Each type has its own unique features and benefits, so it’s important to understand the options available before making a decision.

Surface-mounted Door Closers

This is the most common type of door closer found in commercial spaces. They are installed on the surface of the door and frame, providing easy access for adjustment and maintenance. These closers are versatile and can be used on various types of doors, including metal or wood.

Concealed Door Closers

As the name suggests, concealed door closers are hidden within the door frame or overhead ceiling cavity. This type offers a clean and streamlined appearance as they are not visible when the door is closed. However, installation can be more complex compared to surface-mounted closers.

Floor-spring Door Closers

Ideal for heavy-duty applications, floor-spring closers provide strong closing force suitable for large or high-traffic doors like entranceways or storefronts with glass panels. These closers are installed into the floor beneath the door and offer excellent durability.

Transom Closer/Overhead Concealed Transom Closer

Designed specifically for glass doors that have an aluminum frame at both top & bottom which support transoms etc., these closings devices helps ensure smooth operation while maintaining sleek aesthetics.

 

High Temperature Hydraulic Door Closer

Application of Commercial Door Closer

Hospitals & Healthcare Facilities
In healthcare settings, where hygiene and infection control are paramount, self-closing doors help maintain sterile environments by minimizing the risk of cross-contamination.

Office Buildings

Commercial door closers promote privacy and security by automatically closing office doors after each use while facilitating easy movement between different building areas.

Retail Stores

Ensuring smooth and consistent door operation enhances the shopping experience for customers while minimizing the risk of theft or unauthorized entry.

Educational Institutions

Door closers in schools and universities contribute to campus safety and security by ensuring that classroom and facility doors remain closed and locked when not in use.

Hospitality Industry

In hotels and hospitality establishments, door closers provide guests privacy and security while improving energy efficiency by minimizing air conditioning or heating loss.

 

Process of Commercial Door Closer
 

Installing a door closer may seem like a daunting task, but with the right tools and a little know-how, you can get it done in no time. Here’s a step-by-step guide to help you through the process.

 

First, gather all the necessary materials. You’ll need a door closer, screws, an electric drill with drill bits, and a screwdriver. Make sure you have everything before you begin.

 

Next, determine where on the door frame or jamb you want to install the door closer. Typically, it should be placed about two-thirds of the way up from the bottom of the door.

 

Once you've chosen your spot, mark it with a pencil for reference. Then use an electric drill to create pilot holes for your screws. Be sure to choose drill bits that match the size of your screws.

 

After drilling your pilot holes, hold up your door closer against the marked spot and align it properly. Insert screws into each hole and tighten them using a screwdriver or power tool until they're secure.

 

Test out your newly installed door closer by opening and closing the door several times. It should now operate smoothly and close securely without any issues.

 

Components of Commercial Door Closer

 

 

Hydraulic Mechanism
A hydraulic mechanism responsible for controlling the door's movement is at the heart of every commercial door closer. This mechanism consists of a hydraulic fluid-filled cylinder connected to the door frame and leaf. When the door is opened, hydraulic fluid is displaced within the cylinder, creating resistance that slows the door’s closing speed. The amount of resistance can be adjusted using valves to customize the closing speed and force according to specific requirements.

Spring Mechanism
In addition to the hydraulic mechanism, commercial door closers often incorporate a spring mechanism to assist in closing the door. The spring stores energy when the door is opened and releases it gradually as it closes, ensuring a smooth and controlled movement. The combination of the hydraulic and spring mechanisms allows for precise closing speed and force adjustment, accommodating factors such as door size, weight, and environmental conditions.

Closing Arm
The closing arm is the physical link between the door closer and the door itself, transferring the force generated by the hydraulic and spring mechanisms to control the door's movement. Depending on the door closer's configuration and mounting orientation, the closing arm may be mounted on the door’s push side, pull side, or top jamb. Different types of arms, such as regular, parallel, or slide track, accommodate various door and frame configurations.

Adjustment Valves
Most commercial door closers come equipped with adjustment valves that allow for fine-tuning the closing speed, latch speed, and backcheck (the resistance applied forcefully when the door is opened). These valves can be adjusted using a screwdriver or hex key, enabling precise control over the door closer’s operation to optimize performance and user experience.

 

How Commercial Door Closers Work

 

When the door is opened, the door body drives the connecting rod to move and rotate the transmission gear, driving the rack plunger to move to the right. When the plunger moves to the right, the spring is compressed and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure, and the hydraulic oil in the right chamber flows to the left chamber through the one-way valve. When the door opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left, driving the transmission gear and door closer connecting rod to rotate, and closing the door.

During the spring release process, due to the compression of the hydraulic oil in the left chamber of the door closer, the one-way valve is closed, and the hydraulic oil can only flow out through the gap between the housing and the plunger, and through the small hole on the plunger and 2 The flow channel equipped with the throttle valve core returns to the right chamber. Therefore, the hydraulic oil forms a resistance to the spring release, that is, it achieves a buffering effect through throttling, so that the door closing speed is controlled. The throttle valve on the valve body can be adjusted to control the variable closing speed of different stroke sections. Although door closers produced by different manufacturers have different structures and sizes, the principle is the same.

 

How to Maintain Commercial Door Closer
 

Regular maintenance is essential to ensure the longevity and proper functioning of your commercial door closer. By following these simple maintenance tips, you can keep your door closer in optimal condition.

Clean regularly: Dust, dirt, and debris can accumulate in the mechanism of the door closer over time. Use a soft brush or cloth to clean the surface and remove any build-up.

 

Lubricate moving parts: Apply a small amount of lubricant to the hinges, arm assembly, and other moving parts of the door closer. This will reduce friction and prevent unnecessary wear and tear.

 
 

Check for leaks: Inspect your door closer for any signs of oil leakage. If you notice oil pooling around the unit or dripping from it, it may indicate a seal or gasket problem that needs attention.

 
 

Test closing speed: Periodically test the closing speed of your door by opening it fully and allowing it to close on its own. Adjustments may be necessary if it closes too fast or too slow.

 
 

Tighten loose screws: Over time, screws may become loose due to constant use or vibrations. Regularly check all screws on the door closer and tighten them as needed.

 

 

Our Factory

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.

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Certificate
 
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FAQ
 

Q: What is the difference between standard duty and heavy duty door closers?

A: Heavy duty door closers are made for tougher environments. Granted, they are more expensive, but the amount you save in the long run more than makes up for it. Heavy duty door closers are made to hold up under extreme conditions and high abuse.

Q: What is the difference between a door closer and an operator?

A: The electronic operator is only activated when a user engages a push button, sensor, or wave-to-open switch. Door closers have one purpose – to ensure that the door is fully closed. A person manually opens the door but the closer assists with latching.

Q: How long does a commercial door closer last?

A: Door closers typically last anywhere from 5-15 years, depending on several factors, like attention to maintenance, ie. lubricating and making necessary adjustments, and the operating conditions.

Q: What is the difference between a surface closer and a concealed closer?

A: Unlike a conventional surface mount door closer which remains visible to the interior side of the door or frame, overhead concealed door closers are completely hidden from the public eye and tucked away inside of the door's frame.

Q: Can commercial door closers be adjusted?

A: The settings can be adjusted using a screwdriver or Allen wrench to turn the valves clockwise until they stop. Once all three valves are closed, open the door to make sure it comes to a steady, hard stop. The door should start to slow down when it reaches about three quarters of the way closed.

Q: How do you close a commercial door closer too fast?

A: Turn the adjustment screw clockwise to slow the closer down, counter-clockwise to speed it up. Open the door and watch it close. If it closes right the first time, check it 10 more times. If it closes correctly every time, you're done.

Q: How can I make my commercial door close faster?

A: Use a 1/8-inch Allen wrench or screwdriver in the appropriate screw. Turn clockwise to reduce speed, counterclockwise to increase the speed. ("S"- Swing Speed: is the adjustment for the long swing of the door, "L"- Latch Speed: Adjustment for the short final swing of the door.)

Q: Which is better pneumatic or hydraulic door closer?

A: If you need a door closer for a high-traffic commercial setting, a hydraulic door closer might be the better choice due to its durability and precise control. For residential applications, a pneumatic closer may suffice.

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: What are those door closers called?

A: Such concealed closers when mounted inside a pocket in the door frame (door jamb) are commonly known as "perco's" or perkomatic closers. When door closers are mounted in the header they are known as transom closers. These can be HO (hold open) or NHO (none hold open).

Q: Do door closers go on the inside or outside?

A: Yes, you can install a door closer outside, but it is not recommended, and where you can install it inside the building, ie. there is wall space, this would be advisable. Push-side mounting is advisable for outward-opening doors, so that the door closer is mounted inside the building.

Q: Can a door closer hold the door 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: 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.

Q: How do you adjust the spring tension on a commercial door closer?

A: On most heavy duty door closers an 11/16" wrench can be used to turn the spring adjustment nut clockwise a full 360 degrees to increase the spring tension or rotate the spring adjustment nut counter-clockwise a full 360 degree rotation to decrease the spring tension.

Q: How long does a commercial door closer last?

A: Door closers typically last anywhere from 5-15 years, depending on several factors, like attention to maintenance, ie. lubricating and making necessary adjustments, and the operating conditions.

Q: What is the difference between a door closer and an operator?

A: The electronic operator is only activated when a user engages a push button, sensor, or wave-to-open switch. Door closers have one purpose – to ensure that the door is fully closed. A person manually opens the door but the closer assists with latching.

Q: Can commercial door closers be adjusted?

A: The settings can be adjusted using a screwdriver or Allen wrench to turn the valves clockwise until they stop. Once all three valves are closed, open the door to make sure it comes to a steady, hard stop. The door should start to slow down when it reaches about three quarters of the way closed.

Q: How do you adjust a commercial automatic door closer?

A: Most closers allow you to adjust the speed and power of the door. To adjust the latch or sweep speed: Insert a 1/8-inch Allen wrench or screwdriver in the appropriate set screw. Turn it clockwise to reduce the speed, counterclockwise to increase the speed.

Q: Why is my commercial door not latching?

A: Test the operation of the lock hardware. If there is a problem extending the latch, check the level of the device, the opening and for possible warping in the door. The hinge screws are stripped or the doorframe or jamb is no longer securely attached. Through improper use or wear, hinges can become inoperable.

Q: How do you adjust the spring tension on a commercial door closer?

A: On most heavy duty door closers an 11/16" wrench can be used to turn the spring adjustment nut clockwise a full 360 degrees to increase the spring tension or rotate the spring adjustment nut counter-clockwise a full 360 degree rotation to decrease the spring tension.

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

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