Products Category


 : +86-750-3652251 / 3856396

: +86-750-3856395 / 3856397



Guide to choosing door hardware

  • Cylinder keying systems & Levels of Keying

    Keying systems are available in various degrees of complexity depending on the number of keying levels used. Change keys form the lowest level of the hierarchy of a key system. Master, grand master and great grand master keys form the higher levels of hierarchy of key systems.

  • What is a Master Key System and How a Master Key Work?

    What is master key? A master key is a key which will open all the locks in a set, even though each lock has its own different key.

  • How to choose a suitable Door lock?

    A door lock is a device used to lock a door in place to prevent others from opening this door. Door locks are widely used and can be found almost everywhere. As people's quality of life levels increase, there are more and more types of door locks. However, many people do not know how to properly sel

  • Technical performance of security door locks

    Security door locks are a type of door lock that is very strong and has a wide range of applications. Doors equipped with anti-security door locks can resist abnormal opening under certain conditions for a certain period of time, security door locks have certain security protection properties and co

  • How to choose a door lock in relation to the environment in which it will be used?

    Door locks are essential equipment in people's lives and without them, life's safe living and privacy will not be guaranteed. The development of door locks has been going on for centuries, and the variety of locks on the market has become unimaginable. From the point of view of the material of the d

  • Lock & Latches for Fire and Escape doors

    In order to provide an effective barrier to prevent fire, a door has to remain closed within the frame.

  • What is rising butt hinge and when to use or not to use it?

    Rising butt hinges are designed to allow doors to close slowly using gravity and lift the door slightly as it is opened.

  • Hinge for fire and escape doors

    When use in a fire-resisting door assembly, the door leaf should be hung on single-axis hinges in accordance with local and national regulations. Hinges fitted to fire-resisting doors should be able to achieve the intended fire rating, also the hinge should be able to allow the door closing device, when fitted to a fire-resisting door assembly, to close the door leaf reliably from any angle to which it has been opened, overcoming the resistance of a latch or any seals when fitted.

  • How to choose the Exit Device to provide Safety and Security

    Public buildings like most industrial and commercial premises are required to meet the conflicting need for both safety and security. Regulations relating to escape from buildings and general safety have made it desirable that doors at exits in public buildings, places of public entertainment, shops, etc, be fitted with ​panic exit devices. The main purpose of a panic exit device is to give safe and effective escape through a doorway with minimum effort and without prior knowledge of the device.

  • Which are the most frequently used function of Exit device

    There are many operating functions available. The most frequently used are: Function Description number

  • How to Select Panic Exit Device for doors?

    Exit devices are available in two design styles

  • What is Silencer and where do we use it?

    Sometimes referred to as mutes, silencers are used to cushion the closing of a door in a wood or metal frame, thus quieting the closing of the door. Door silencers are small rubber buttons, approximately 1/8” thick, with a projecting portion for insertion into holes prepared in the stop of frame.

  • What are Protective Plates?

    Protective plates are used on doors in all types of buildings. They are designed to protect doors from scratches, dents and other damage caused by moving equipment through openings.

  • How to choose Hinge for Door?

    The door hinge is an important part of door, it can make open and close the door easily, can also make the door installation and removal easy. We have plated the surface of exterior and interior door hinges, it looks smooth and deepens the beauty of commercial building. Compared with single hinge, the door hinges hardware offers additional savings.

  • What is a door coordinator and what does it do?

    Door coordinators are used to control the closing sequence of a pair of doors when both leaves are furnished with latching hardware and one leaf latches into the other of has an overlapping astragal. Typically, these openings will have a vertical rod exit device or automatic flush bolts installed on

  • What's the Door Lock?

    Locks are one of the world's oldest inventions, with a wide variety and thousands of years of development. The door lock is one of the locks that are indispensable for any occasion in our lives. The importance of door locks is particularly evident. Today we will combine the definition and characteristics of door locks with a brief summary and analysis of door locks.

  • How to choose a Door hinge?

    The product we are presenting today is the door hinge, an important component for safety and security, which is used to connect various doors. In this article, we will describe the functions and types of door hinges, as well as some advice on how to choose them.

  • The common types of Door hardware.

    With the development of metalworking technology, the use of door hardware is becoming more and more widespread. door hardware is an extremely important type of everyday metalwork in people's daily lives, and it is used in wooden doors, glass doors, sectional doors and other metal devices made by man

  • Where are Door Closers required?

    A ​door closer is an adjustable and spring-loaded mechanical arm that closes a door automatically after it has been opened. Door closers are usually filled with hydraulic fluid, which dampens the door swing and controls its operation. Installing a door closer adds a level of control to your door's safety and security.

  • What is the different between Panic Hardware & Fire Exit Hardware?

    An exit device is a piece of hardware mounted on the push side of a door. It is designed to release a latching mechanism in the event of panic. Exit devices are intended to operate without prior knowledge or training when pressure is applied to horizontal bar or push pad mounted to the door. Because of their direct effect upon life safety, exit devices are one of the most important hardware items in a building. Panic Hardware and Fire Exit Hardware are two different types of exit devices, and the proper selection is determined by code requirements.

  • How to choose the appropriate door hinge?

    Door hinge is the most common door fitting device that connects the door frame to the door leaf and allows rotation between the two. The hinge can withstand the weight of the door without sagging the door, and allows the door to rotate freely for a long time under the lowest frictional resistance. The hinges come in a variety of materials, including zinc alloy, steel, plastic, and stainless steel. Different materials determine the scope of use of the hinge. The choice of hinges has a very large impact on the use of the door. If an improper hinge is installed on the door, it is not only difficult to play the role of the door, but serious circumstances may endanger life safety. In order for the door to maximize door hanging and gating, it is important to choose the appropriate hinge.

  • How to choose hinges for different functions?

    The stainless steel hinge is a metal connector that is seen on the door every day so that the door can be mounted on the door frame and can be freely rotated. The hinges can be seen in any place with a door, but it is often overlooked and used without a professional choice.

  • How to Choose the Right European Mortise Lock?

    The mortise lock is generally used on the security door, suitable for general commercial and heavy industrial use. The D&D range of architectural locks is manufactured to the highest engineering standards and designed to offer a high price/performance ratio. They have been successfully type tested to all the requirements of BS EN12209. The following describes the various types of European mortise locks and the safety features that should be considered.

  • How To Select And Install the Door Hinge Properly?

    Door hinges, one of the hardware accessories, are used to connect or rotate the device so that the door can be freely opened and closed by hinges. There are many types of door hinges, such as fire rated door hinges, metal door hinges, European door hinges, etc. In general, the hinge is composed of a pair of metal leaves, the distance between hinge and door can be adjusted when installing .One of the characteristics of door hinge is that it can be used according to the space and the opening angle of the door, so that various doors have corresponding extension. Different doors need to pay attention to their size when using hinges.

  • How to choose the Hinge?

    The appropriate specification and correct selection of hinges is crucial to their performance and depends on the following factors; 1. Is it a fire, smoke or emergency escape door? 2. How heavy is the door and what are the door dimension (height, width and thickness)? 3. What is the door's construction and are there any unusal features that could affect the hinges? 4. Where is the door situated e.g internal or external; is it near the coast or in a swiming pool? 5. What level of use/abuse will the door be subject to e.g office, hospital or school corridor? 6. What other items of hardware are to be fitted, that may be affect the hinge performance, typically door closer or door stops? 7. Any other unusal features involved e.g. door has radius top or the door is a bifold.

  • How to choose the door control hardware

    Door control hardware refers to door closer, floor springs, hinges, latches, locks, door stoppers, etc., which are widely used in wooden doors, glass doors, metal doors and other door hardware accessories. Control door hardware is a kind of daily-use metal products that are extremely important to people's daily life. Floor springs and door closer are the most important part. They are generally used in public places where the people frequently accessed, such as shopping malls, office buildings, residential buildings, exhibition halls, etc. It can ensure that after the door is opened, it will remain normally open or can be closed to the initial position in time.

  • Do you know how to choose your door handle?

    Choosing your door handles there are 4 things to consider. At the same time ,this might seem a little daunting, it isn’t if you follow the steps below. The important things you will need to consider are......

  • How to select correct Door Closer for Interior door?

    Choosing a door closer changes depending on many different factors including customer preference, manufacturer options, and building specifications. Other factors to consider include:Size and weight of the door.Location of the door.Opening and closing frequency.Mounting location.Affordability.Backswing requirements.

  • How to choose Door Closer?

    The door closer is a hydraulic device similar to the spring on the door head. When the door is opened, it can be released after compression, and the door can be closed automatically. It has the function of spring door, which can ensure that the door can be closed to the initial position accurately and timely after being opened.

  • Do you know the type of door hinges?

    In daily life, door hinges can be seen everywhere. There are many types of hinges. Do you know how to name it? Please follow us to see the main types.

  • How to choose door hardware for wooden door?

    The Door Accessories that complements your door—the Door Hinges, Locks, Lever Handles, Door Closers, Flush Bolts, Door stopper, faithfully perform their jobs. Should you choose the door hardware, it is important to account for budget, style and function. As a professional suppliers of door hardware, D&D offers a combination of architecture door hardwares to suite the individual building whatever it is exterior or interior, meeting not only the requirements for design and function, but also the desired budget.

  • How to choose the right hinges for your door & project?

    When it comes to doors, hinges is very important. Their style and functionality have a huge effect on the performance of your doors. The good news is that a wide range of hinge options are available, so there's an excellent chance there's a hinge out there that's right for your application.

  • Application Technique of Door Hardware

    Door hardware has a very important position in the modern complex function construction project. Standardized and professional hardware plays an important role in ensuring the operation, safe escape, security, environmental comfort and aesthetic of a building. 8 considerations of configuration (Core application technology in the industry) as below

  • The key to buying an indoor door lock - Pay attention to the lock cylinder, lock body!

    In modern home decoration, there are often some inconspicuous parts that play an important role. And we often overlook the importance of them, know that there is a problem, and everyone began to pay attention, then it was already late. Among them, there are indoor door locks that are often overlooked. In general, indoor door locks are in contact with us every day, so we must pay attention to its purchase work. However, for home improvement white, because of the little knowledge of interior door locks, it is difficult to quickly purchase a truly beautiful and high quality product. The interior door lock is one of the hardware. Its role is relatively large. It can be said that the privacy of our home is guarded by it. At the same time, it directly affects the use effect and service life of the interior door. Since it is such a key component, how can we choose it?

  • Why Choose Stainless Steel 304 Door Locks?--D&D Hardware

    In front of the lock forms on the market, many consumers are confused; don't know how to choose the stainless steel door lock to be both safe and durable?

  • How Qualified D&D Team can assist customers find the Right Solution?-D&D Hardware

    In order to provide professional assistance to our customers to find the most suitable solution, we have product knowledge training every month. The trainer is a door hardware engineer with more than 12 years of work experience in the industry.

  • What should i consider when buying an Exterior Door Handle?

    When buying door handle, you need to pay attention to essential elements. The essential elements will help you to choose the right exterior door handle to fit your needs. As the most important feature of a door it can be the showpiece of the front of a home. It is a functional and beautiful for any door; however, the perfect front door handle can be difficult to locate. All in all, the right exterior door handle needs to be durable and elegant and needs to fit all of your home's needs.

  • D&D Team participated in the DHI Seminar on Architectural Hardware

    In order to assist customers find the Right Door Opening Solutions, D&D Team often participate in Architectural Hardware Association Training, strengthen the door hardware Professional knowledge, skills and competitiveness.

  • How to install the fire rated door hinge?

    Installation of fire rated hinge

  • How can a qualified team help customers provide professional solutions? -D&D hardware

    In order to provide customers with better and more professional services. Today, D & D hardware carried out professional training and assessment of product knowledge and technology.

  • How to choose the right lock cylinder?

    European profile lock cylinders are the most popular type in the market. They usually have same shape but different in materials, sizes, brands especially the types of keys and locking mechanisms. The cylinder provides security functions such as anti-prying, anti-drilling, anti-shatter and anti-replication.

  • How to choose the American Standard Mortise Lock?

    When choosing the lock, the safety of the mortise lock is the first element. For the best protection, many buildings have mortise locks. The mortise locks do provide strong security and can be used in commercial and residential applications.

  • To prevent the spread of Covid-19 with Antimicrobial & Antiviral door handles!

    Antimicrobial & Antiviral Door Handle--Covid-19 is still spreading, are there ways to avoid being affected while using a door handle? As using a door handle just like shaking hands with thousands of people.

  • How to Choose the Hinge for interior Door?

    There are four basic steps to follow when selecting or scheduling hardware for door opening. These steps follow the logical order in which the hardware would be installed.

  • How to determine the type of hinge?

    The hinges are one of the most active components of any opening combined with the lock, exit device and closer. Hardware in general is not thought of unless it does not work properly, and the door unit will not function properly if the proper hanging device is not specified. So, how do we determine The hinges are one of the most active components of any opening combined with the lock, exit device and closer. Hardware in general is not thought of unless it does not work properly, and the door unit will not function properly if the proper hanging device is not specified.

  • How to Choose the Right Hinge for Door

    Door hardware is an important part of the door, in the design and calculation of door hardware selection, hinge as a load-bearing component, has an important position. The bearing capacity of hinge affects the safety performance and service life of the whole door.


Contact Info

:+86-139 2903 7292   David Jian

: +86-750- 3856396


:  No.4 Bldg, Street 33, West Gaoxin Rd, High-tech Zone, Jianghai Dist. Jiangmen City, Guangdong, China 

©Copyright D&D HARDWARE INDUSTRIAL Co., Ltd. All Rights Reserved.