UL Listed Commercial Hydraulic Door Closer Heavy Duty Adjusting Speed and Force

UL Listed Commercial Hydraulic Door Closer Heavy Duty Adjusting Speed and Force

• ANSI A156.4 Grade 1 certification, 2 mils + life cycles
• Dorrenhaus - Focusing on manufacturing door closer
• Even operation, oil tight, no abnormal sound

Ω Casting alloy aluminum closer body with reinforced adjustable steel arm

Ω Electroplated plastic cover available, slim plastic cover is for optional

Ω No manual closing required, designed for all standard installation methods

Ω UL 228 listed American style heavy duty commercial hydraulic door closer

Ω Dual adjusting valves control the closing & latching speed separately

Ω Adjusting closing force #1-6, comply with regulation of ADA standard

Ω Adjustable back check available, delayed action, & hold open optional

Ω UL 10C certification, fire rated up to and including 3 hours

► Long-term cooperative vendors of world's top door hardware companies

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

* GENTLE, NO NEED TO CLOSE BY HAND: let the door close by itself, enjoy automatic closing

and latching, maintaining quiet and security.

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

closing doors slowly enough to allow graceful entrance and exit

* RELIABLE CERTIFICATION: ANSI 156.4 - Grade 1 is the topmost achievable standard for door

closer. This one has actually surpassed a test to 2 million + cycles.

* ADJUSTABLE TO YOUR NEEDS: let customer act at their own pace. which level should be

adapted for closing power: from level 1 to level 6.

* MEET YOUR REQUIREMENTS: surface mounted model and full sets of screw package, allow

you to install at any high-traffic area, supply full control at the same time.

           ------------ 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.