Small Size Easy Open Close UL Door Closer D303S Steel Arm Max Door Width 950mm

Small Size Easy Open Close UL Door Closer Steel Arm Max Door Width 950mm

• UL 3 hours fire certification, safety and reliable
• No oil leakage, no abnormal noise, 3 years warranty
• Smallest size 3, cost-effective, suit for door width 950 mm

The closer body dimension of this model is near to larger model D303, while
the cost is much lower, it's cost-effective model for residential application.

Ω Economical Model Small Size Mainly for Residential Application
Ω Precised Cast Aluminum Closer Body with Adjustable Steel Tube Arm
Ω Two Separate Regulating Screws Adjusting Closing & Latching Speed
Ω Designing for all normal mounting methods, easy open easy close
Ω Applicable Door Weight 40-65kg, Door Width 950mm, Spring Force #3
Ω Aluminum Guide Rail Arm with Hold Open Function is for Optional
Ω Swinging Fire Door Closers Model D303S Have been investigated by
UL in accordance with the Standard(s) UL228 and CAN/ULC-S133-16
Ω UL 10C Online Directory Certifications, including 3 Hours Fire Rating
Ω Main material aluminum, light and strong, economical model for family
Ω Fireproof lubricating oil for smooth running and constant lubrication

► Trusted cooperative partner of international top door closer companies


Finishes: Painted - Silver, Bronze, White, Gold, Black, Brown

* Spring forward, ease back: adjustable steel tube arm will not impact opening,
meanwhile shut doors gradually to allow for graceful extry and exit
* Soft, no manual closing required: let the door do the work, enjoy automatic
closing and latching, maintaining quiet and security.
* Consummate craftsmanship:smooth running, oil tight and noiseless

------------ Our Advantages ------------

1. Only produce door closer, annual output 1.5-2.0mils pcs.

2. UL & CE certification, max. Life cycle test of 5 mil. Cycles.

3. Pass European & China ISO9001:2015 QMS Certification.

4. Mainly for export market since foundation in October, 2011.

5. Long term cooperative supplier of world’s top security brands.

A High-end Germany Gating Hardware Brand

Originally founded in 1872, Dorrenhaus is a high-end Germany gating hardware brand. At the beginning of 1980's,

Dorrenhaus entered into Chinese market, and supplied numerous households in China with high quality hardware products.

On October 10, 2011, Dorrenhaus's door closer manufacturing base in China - Zhejiang Dorrenhaus Hardware Industry Co.

Ltd was formally founded. All members of management team have more than 15 years of experience in door closer industry.

Marketing Under Dorrenhaus and DORHAUS Brand

In 2017, our new trademark - DORHAUS was registered. We have $3 million registered capital. Our main products include

hydraulic door closers, automatic door closers, concealed door closers, commercial door closers, fire door closers, auto door

closers, sliding door closers, heavy duty door closers, overhead door closers, UL-listed door closers and door closer parts.

We have 205 total number of employees, which includes seven R&D staff and 13 quality control staff in our

15,000-square-meter factory.

Exporting Products Worldwide

Now, we have six complete production lines with annual output of 1.5 to 2.0 million sets. We export our products to more than

20 countries in North America, Europe, Russia, the Middle East and Southeast Asia. We passed the certification for EN ISO

9001:2008 quality management system in 2014, and ISO9001:2015 in 2017 respectively.

Our products passed many international and domestic certification and standard, such as:

American National Standard: ANSI 156.4 Grade 1, life cycle test of 2mil cycles

American UL228 and UL 10C for 3 hours fire testing

European Standard CE: EN1154, life cycle test of 500,000 cycles

European Standard CE: EN1634 fire testing

China National Standard: QB/T 2698-2005 Grade 1, life cycle test of 1 mil. cycles

China Compulsory Product Certification for fire rated door closer

Cooperate with Us Today

For more detailed information regarding our business, contact us today.