Silent Commercial Grade Hidden Door Closer D20 Smooth Running Lightweight

Silent Commercial Grade Hidden Door Closer D20 Smooth Running Lightweight

• Smooth running, no oil leakage and abnormal sound
• Two valves control closing and latching speed
• Commercial Grade Best for Hotel Room Door

Dorrenhaus commercial grade hidden door closer D20, hydraulic structure,

rack and pinion type, with closing force of EN-2, applicable for 850mm

width door or 45kg weighing door.

1. Material: cast aluminum closer shell, aluminum hidden sliding track arm

2. Two valves, one controls closing speed, another controls latching speed.

4. Durable closer lubricating oil for any climate running and constant lubrication

5. Appearance: concealed design, soft with its body , temper force with grace

6. Properties and 150,000 plus life cycles comply with Chinese national standard

7. Automatic Lightweight Hidden Door Closer Size / Speed Fully Controlled

8. Structure: rack and pinion type, needle bearing with two-time heat treatment

9. Best for medium and light traffic area, such as a small office or hotel room

10. Completely controlled from setting of opening force to door latching speed

11. Slim body with 28mm thickness, Minimum door thickness for installation

- 40mm for wooden door and 35mm for sash door

► Stable cooperative manufacturer of international famous door closer companies

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

* SPRING FORWARD, EASY BACK: commercial-level swing arm will not impact opening,

while closing doors silent and slowly enough to allow graceful entrance and exit

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

closing and latching, maintaining quiet and security.

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