Products

The organization keeps into the procedure concept “scientific administration, premium quality and effectiveness primacy, consumer supreme for Top Grade Aluminium Adjustable Door Stop Function Concealed Overhead Door Closer Hydraulic, We will continue to keep operating hard and as we consider our best to supply the most effective high-quality products, most competitive selling price and exceptional company to each customer. Your gratification, our glory!!!
The organization keeps into the procedure concept “scientific administration, premium quality and effectiveness primacy, consumer supreme for China Aluminum Alloy and Door Closer, We only supply quality merchandise and we believe this is the only way to keep business continue. We can supply custom service too such as Logo, custom size, or custom goods etc that can according to customer’s requirement.

They disable the self-closing function of a fire protection door in a controlled way. This means that they keep fire protection doors open, but automatically release them in the event of a fire so that door closers can do their job.

WE ARE DORRENHAUS
WE STARTED AS A FAMILY BUSINESS, OVER 140 YEARS AGO!
Dorrenhaus brand was originated in 1872 in Germany,with the development and progress, Dorrenhaus successor decide to invest door closer factory in China.In 2011,Zhejiang Dorrenhaus Hardware Industrial Co.,Ltd was formally established.

The D4016 Series features a single-piece cast aluminum body and a 1-3/8” heat-treated steel piston, a heat-treated pinion and staked valves. The D4016 Series standard door closer is certified ANSI/BHMA A156.4 Grade 1, is UL listed and is backed by a 10-year warranty.

*In case of unusually high or heavy doors, windy or draughty conditions, or special installations, a large power size of door closer should be used.

Door closers pull doors closed once they’ve been opened and released. They are used on fire doors to help prevent the spread of flames and smoke in the event of a fire. They are also used to keep out drafts and regulate room temperature in interior spaces.

Dorrenhaus comprises R&D center, testing laboratory,manufacturing center and sales dept, has over 10 in-service engineers and research specialists. Since it was founded, developing High performance door control products has always been the objective of Dorrenhaus. Dorrenhaus people have continuously tried to improve product quality, introducing oversea high and new technical equipment,giving our company good technical capabilities. Moreover, all of our R&D engineers has more than 20 years experience in door closer industry.

The organization keeps into the procedure concept “scientific administration, premium quality and effectiveness primacy, consumer supreme for Top Grade Aluminium Adjustable Door Stop Function Concealed Overhead Door Closer Hydraulic, We will continue to keep operating hard and as we consider our best to supply the most effective high-quality products, most competitive selling price and exceptional company to each customer. Your gratification, our glory!!!
Top Grade China Aluminum Alloy and Door Closer, We only supply quality merchandise and we believe this is the only way to keep business continue. We can supply custom service too such as Logo, custom size, or custom goods etc that can according to customer’s requirement.