Overhead Concealed Automatic Door Closer with Hidden Sliding Arm No Oil Leakage

• Smooth operation, no oil leakage, noiseless
• Dorrenhaus - UL certified | Export since 2011
• Size 3 closing power, for door weight of 65kg

Dorhaus concealed door closer model D30, hydraulic structure, with UL 10C 3 hours
fire rating certification, is mainly used for room door of hotel, restaurant or similar
public area. Hold open unit is for optional, which can be mounted or moved easily.
A lot of commercial building doesn't permit the mounting of any type of door
hardware with hold open function.

Ω UL listed overhead concealed door closer with hidden sliding arm
Ω Accord with UL 228 standard, tested life cycles of 200,000+
Ω Automatic latching and closing speed controlled by two adjusting valves
Ω Max. opening angle: 150 degree, hold open unit optional
Ω Fixed closing size #3, max. 950mm door width, 65kg door weight
Ω Non-handed surface mounted, designed for universal application
Ω Cast aluminum closer body with anodized aluminum sliding arm
Ω Conform to UL 10C standard, including 3 hours fire rating

► 7 years cooperative partner of international first-rate door control companies


Finishes: Aluminum, Gold, Bronze, Black, Brown, White

* SOFT, NO MANUAL CLOSING REQUIRED: let the door do the work, enjoy self-acting
closing and locking, keep quiet and sureness.
* SPRING FORWARD, EASY CLOSING: the commercial-grade arm will not impact opening,
while closing doors slowly enough to allow graceful entrance and exit

           ------------ 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.