Easy Open Surface Mounted Door Closer D503 Auto Closing 3 Hours Fire Rated

Easy Open Surface Mounted Door Closer D503 Auto Closing 3 Hours Fire Rated

• Smooth operation, oil tight, no noise
• 7 years supplier to world's top brand
• UL228 listed, life cycles of 200,000+

* SPRING FORWARD, EASY CLOSING: commercial-level swing arm won’t interfere with

opening, and close the door slow enough to allow for elegant entry and exit

* SOFT, NO NEED TO CLOSE MANUALLY: allow the door do the work, enjoy automatic

closing and latching, maintaining quiet and security.

Closer Painting: - Aluminum, Bronze, Brown, White, Black, Gold

Ω Light and Medium Duty Door Closer for Residential and Commercial Doors

Ω Surface Mounted Type, Door Open Angle Limit: Max. 105 degree

Ω Advantages: Popular Design for both USA and European Market

Ω Non-handed Installation Design, Suitable for All Standard Mounting

Ω Rack and Pinion with Double High Heat Treatment, Powder Bearing

Ω Auto Closing Power #3, Applicable for Door Weighing 40-65kg

Ω Fuchs hydraulic fluid especially for closer guarantee constant lubrication

Ω Hold Open Arm for 90º Stop Optional

Ω UL 10C standard tested and certified, up to and including 3 hours fire rated

► Reliable cooperative partner of world's high-end hardware brands

------------ 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.