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Home
Dorrenhaus
About us
News
FAQs
Products
Door Closer
Ul Listed Door Closer
Ce Listed Door Closer
Concealed Door Closer
Hold Open Door Closer
Heavy Duty Door Closer
Floor Spring
Lock Body
Hinge
Panic Bar
Automatic Door Operator
Certificates
Product Certificate
Patent Certificates
Download
Products PDF
Category PDF
Contact Us
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Top 10 Door closer Manufacturers in 2022:The Ultimate Guide to Help You!
Top 10 Door closer Manufacturers in 2022:The Ultimate Guide to Help You! Do you need to buy Door closers? Do you find it difficult to obtain information about the different brands in the market? We have done a detailed survey for you, through this article you can...
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The installation steps of the door closer
The installation steps of the door closer Before installation, you must read the installation instructions carefully, and don't forget to install the plastic cover, which can be used to catch the hydraulic oil leaking from the ...
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What are the installation methods of door closers?
What are the installation methods of door closers? The installation of door closers is something we often encounter in the construction of weak current projects. Here are five methods for installing door closers. I hope all wea...
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In addition to the door, the hinge on the door is also very important
The working principle and types of door closers In our decoration, people pay a lot of attention to the material and type of the door, but few people pay attention that the various functions provided by the door are based on th...
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What is an electric door closer?
What is an electric door closer? What is an electric door closer? With the advancement of technology, electric door closers are now one of the more popular door closers on the market. Its use in safety passages in public buildi...
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The invention of the door closer and its function
The invention of the door closer and its function Modern hydraulic door closers (referred to as door closers) began with a patent registered by the United States in the early 20th century. It is different from traditional door ...
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The working principle and types of door closers
The working principle and types of door closers The working principle of the door closer is when the door is opened, the door body drives the connecting rod to move, making the transmission gear rotate, and drives the rack plun...
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What is the function of the door closer besides closing the door?
What is the function of the door closer besides closing the door? The core of the design idea of the hydraulic door closer is to realize the control of the door closing process, so that various functional indicators of the door...
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What is the difference between a door closer and a floor spring?
What is the difference between a door closer and a floor spring? Door control hardware is a very important supporting product device in people's daily life. It mainly includes: floor springs and door closers, usually used in sh...
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