Backcheck Automatic Hydraulic Door Closer Top Jamb Mounted for Commercial Door

Backcheck Automatic Hydraulic Door Closer D903 Top Jamb for Commercial Door

• EN 1154 (Performance) / EN 1634 (Fire Rating) Certification
• Smooth Running, Oil Tight, No Abnormal Sound
• Euro Market Favorite Model, Meet CE Standard Grade 1

1. Automatic Hydraulic Closer Whole Controlled for 40-65kg Commercial Door

3. Material: cast aluminum closer shell with flat adjustable steel rocking arm

4. Hydraulic Structure: needle bearing, rack and pinion with dual heat treating

5. Product Surface: classic European style, square body with round cover

7. Application: best for medium traffic such as an office, or residential door

8. Designed for Regular-Arm and Top Jamb mounting, Parallel-Arm optional

9. Whole process controlled from door opening force to door latching speed

10. Auto closing & latching speed adjustable by two separate regulating valves

11. Adjustable backcheck function optional, guide rail arm alternative

12. Fuchs Lubricating oil specially for smooth and constant closer lubrication

► Long-term cooperative vendors of world's top security brands

Closer Finishes - Silver, Gold, Bronze, Brown, White, Black

* SPRING FORWARD, EASY BACK: the commercial-grade arm won’t interfere with opening,

meanwhile shut doors gradually to allow for graceful extry and exit

* CERTIFIABLY RELIABLE: CE EN1154 - the supreme standard which could be achieved

by swing door closer. The model is actually much more than 500,000+ cycles testing.

* SOFT, NO NEED TO CLOSE BY HAND: the door will closer by itself, enjoy self-acting

closing and locking, keep quiet and sureness.

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