UL Listed Door Closer
CE Listed Door Closer
3C Certified Door Closer
Concealed Door Closer
Economic Door Closer
European Door Closer
American Door Closer
Parts of Door Closer
Adjustable Door Closer
Fixed Size Door Closer
Sliding Arm Door Closer
Hold Open Door Closer
Heavy Duty Door Closer
Learn home fire safety self-inspection
We don’t know when accidents will come. Most accidents are caused by negligence and neglect. Therefore, everyone should increase the awareness of fami...
Several installation methods of door closer
The characteristic of the door closer is to accurately close back to the original position after the door is opened. It is widely used in our lives, m...
What is the difference between door closer and floor spring?
Door control products in the hardware industry are very important accessories in our life. Although door closers and floor springs can ensure that t...
How to choose high-quality fire doors
Different fire doors have different flame retardant time in fire scenes，so that the effect is very different. There are many ways to choose a high-q...
The effect of door closers on the door
The sort of door closer is the accessories of the door industry in the hardware accessories industry. Usually，we are extremely easy to be misled by t...
127th Canton Fair scheduled online from June 15 to 24
Dear overseas buyers, exhibitors and relevant parties involved: The Ministry of Commerce of PRC has decided that the 127th Canton Fair is to be hel...
Working Principle of Closer
The basic components of the hydraulic door closer are support guide, transmission gear, reset spring, one-way valve, rack plunger, throttle valve cor...
The function of the door closer
Modern hydraulic door closer (hereinafter referred to as the door closer) began in the early twentieth century, a patent registered by the United Sta...
Use Requirements and Selection of Closers
Closer products must meet the national standard GB/T 2698-2005. Closers used for fireproof doors should also meet the requirements of GA93-2004 Firep...
Installation Method of Closer
The most commonly used shutters are external shutters, which are installed in the following ways: The most common standard usage is that the door c...
Installation steps of door closer
1) Usually there are installation templates in the instructions provided with the door closer, so first read the instructions and determine the insta...
Use, Maintenance and Repair of Closer
The newly installed door closer should be inspected and re-tightened for about a week to 10 days. The hydraulic oil recommended by the manufacturer...
Zhejiang Dorrenhaus Hardware Industry Co., Ltd.
No. 350, Guilan Road, Qiaodun Town, Cangnan County
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