UL Concealed Automatic Door Closer

Concealed Automatic Door Closer Chrome Plated UL Listed with Sliding Arm

• Advanced Craft : smooth running, noiseless, oil tight
• UL 228 Certification, 200,000 plus tested life cycles
• Fixed Closing force size 3, suit for door width 950mm

New developed concealed door closer D30 PCP, with polished chorme plating,

looks elegant & high-end. It's of overhead and hydraulic type, mounted inside
wooden or sash metal door. Usually it's for project especially for hotel use.

Ω UL listed concealed automatic door closer with sliding arm
Ω Anodized aluminum sliding track arm with hold open unit
Ω Closing sped and latching speed adjustable
Ω Enforced casting aluminum slim body, with 32mm thickness
Ω UL 228 Certification, life cycles of 100,000+
Ω UL 10C Certification, up to 3 Hours Fire Rating
Ω Fixed closing force size 3, suitable for 40-65kg 950mm width door
Ω Working Temperature Range: -40 to 45 ℃
Ω Max door opening angle: 150 degree

► Long-term cooperative vendors of international well-known door control brands



Finishes - Polished Chrome Plating, Silver

* GENTLE, NO MANUAL CLOSING required: allow the door do the work, enjoy self-acting
closing and locking, keep quiet and safety.
* SPRING FORWARD, EASY BACK: the commercial-grade arm won’t interfere with 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.