Concealed Automatic Door Closer With Hidden Sliding Arm Max Door Weight 65kg

Concealed Automatic Door Closer With Hidden Sliding Arm Max Door Weight 65kg

• No oil leakage, no abnormal noise, smooth running
• Large closing force, the largest optional for 80kg door
• Two steps speed adjustment of closing and latching

Dorrenhaus automatic hydraulic door closer D30 concealed type, mainly designed
for hotel room door. If necessary hold open unit can be installed or removed easily.
Anyhow, Most local building codes do not allow the installation of any type of door
hardware that holds "Fire Doors" in the open position.

* Door Closer Concealed Rack & Pinion type with EN size 3
* Fully hydraulically adjustable closing and latching speed
* Suitable for max door weight 65kg and door width 950mm
* Precise cast aluminum body with alluminum hidden sliding arm
* Minimun door thickness for installation
- 45mm for wooden door and 40mm for sash door
* Certification of UL 228, 200,000 + life cycles
* Universal application, non-handed installation
* Certification of UL 10C, fire rated up to 3 hours

► Reliable cooperative vendors of universal well-known door control enterprises


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

* GENTLE, HANDS-FREE CLOSING: let the door finish work, enjoy self-acting closing and
locking, keep quiet and safety.
* SKILLED WORKMANSHIP: even running, oil tight, noiseless
* SPRING THRUST, EASY CLOSING: commercial-level sliding 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.