UL Listed Small Door Closer Size 3 , Overhead Door Closer Adjustment Speed

UL Listed Small Door Closer Size 3 , D303S Overhead Door Closer Adjusting Speed

• Even running, no oil leakage, noiseless
• Sinicism style, favourite in Chinese market
• UL 3-hour fire certification, safety and reliable

Dorhaus D303S door closer, with automatic hydraulic structure, small and exquisite,

it's favourite model in domestic building business, especially for landing-answer door.

1. Overhead Small Door Closer UL Listed Fire proof for Residential Door

2. Reliable lubricating oil for all weather running and continuing lubrication

3. Material: lightweight casting aluminum shell, adjustable steel flat arm

4. Closing and latching speed adjusting by dual regulating valves

6. Has been investigated by UL according with the standard(s) UL228,

comply with UL 10C standard, designed for usage with swinging

type fireproof door rated up to and including 180 minutes.

7. Appearance: Traditional Chinese style, Small and Exquisite

8. Best for low traffic such as closets, or residential applications

9. Non-handed overhead mounting for Regular Arm and Top Jamb

10. Hydraulic Structure: powder bearing, rack and pinion type

► Reliable cooperative supplier of international well-known door closer companies

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

* GENTLE, NO MANUAL CLOSING: the door will closer by itself, enjoy self-driven closing

and latching, maintain quiet and security.

* SPRING FORWARD, EASY BACK: adjustable steel flat swing arm will not impact opening,

meanwhile shut doors gradually to allow for graceful entry 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.