Easy Open Concealed Automatic Door Closer D20 Smooth Operation Sliding Rail

Easy Open Concealed Automatic Door Closer Smooth Operation Sliding Rail

• Smallest concealed door closer for 20-45kg door
• CE- and UL- certificated | Exporting since 2011
• Smooth operation, no oil leakage, noiseless

Dorrenhaus D20 concealed door closer is mainly manufactured with casting

alluminums, with light weight, strong closer housing and spring, the closing

force of the model is size EN-2, applicable for 20-45kg door weight or max.

door width of 850mm.

1. Hydraulic type, twice high temp. heat treatment needle bearing and pinion

2. Automatic Concealed Closer Whole Process Control Overhead Mounted

3. Structure of product: dual Heat Treatment needle bearing, pinion and rack

4. Core Advantage: Chinese Best-selling type, comply with national standard

5. Application: lower frequency, such as residential restroom or hotel room door

6. Material: aluminum cast closer housing, anodized aluminum sliding rail arm

7. Produced according to UL 228 standard, tested life cycles 150,000 plus,

8. Whole process controlled started from opening force ended at latching speed

9. Durable door closer fluid for more smoother operation and constant lubricating

10. Two speed regulating valves control the closing and Latching speed exactly

► Long-term cooperative vendors of universal first-rate security enterprises

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

* SPRING THRUST, EASY CLOSING: commercial-level swing arm will not impact

opening, meanwhile shut doors gradually to allow for graceful extry and exit

* SOFT, NO MANUAL CLOSING : let the door close by itself, enjoy self-driven

shutdown and lock, maintain 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.