Safety Control Metal Door Closer with Hold Open Arm Easy Open Top Jamb D503T

Safety Control Metal Door Closer with Hold Open Arm Easy Open Top Jamb D503T

• Exquisite Workmanship: even running, oil tight, noiseless
• Dorrenhaus - Focusing on manufacturing door closer
• Dual heat-treated needle bearing, rack and pinion

Dorhaus aluminum door closer Model D503T is designed for internal residential and

commercial application, including full set of screws package for all standard installation,

it is a light-medium duty closer which meet the requirements of UL 228 standard. Fixed

spring strength size 3, suitable for max. door width 950mm or door weight 65kg.

Ω Light and medium duty metal door closer with hold open rocker arm

Ω Precise cast aluminum closer body and forged steel DT-03 HO arm

Ω Adjustable latching & closing speed controlled by two regulating valves

Ω Rack and pinion type, with double high heat treatment, safety controlled

Ω DT-02, DT03 or DTWB hold open arm are for optional

Ω Easy opening angle: 90 degree, max. open angle: 120º

Ω No need to close manually, suitable for regular arm and top jamb mounting

Ω Fixed spring force #3, applicable for door width 950mm or weight 40-65kg

Ω Durable closer lubricating oil best for all weather operation and lubrication

► 7 years cooperative supplier of universal top door closer enterprises

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

* GENTLE, HANDS-FREE CLOSING: let the door finish work, enjoy self-acting closing and

locking, keep quiet and sureness

* SPRING FORWARD, EASY BACK: commercial-level hold open 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.