Easy Open Concealed Automatic Door Closer D20 Smooth Operation Sliding Rail

Easy Open Concealed Automatic Door Closer Smooth Operation Sliding Rail

• Smallest concealed door closer for 20-45kg door
• CE- and UL- certificated | Exporting since 2011
• Smooth operation, no oil leakage, noiseless

Dorrenhaus D20 concealed door closer is mainly manufactured with casting

alluminums, with light weight, strong closer housing and spring, the closing

force of the model is size EN-2, applicable for 20-45kg door weight or max.

door width of 850mm.

1. Hydraulic type, twice high temp. heat treatment needle bearing and pinion

2. Automatic Concealed Closer Whole Process Control Overhead Mounted

3. Structure of product: dual Heat Treatment needle bearing, pinion and rack

4. Core Advantage: Chinese Best-selling type, comply with national standard

5. Application: lower frequency, such as residential restroom or hotel room door

6. Material: aluminum cast closer housing, anodized aluminum sliding rail arm

7. Produced according to UL 228 standard, tested life cycles 150,000 plus,

8. Whole process controlled started from opening force ended at latching speed

9. Durable door closer fluid for more smoother operation and constant lubricating

10. Two speed regulating valves control the closing and Latching speed exactly

► Long-term cooperative vendors of universal first-rate security enterprises

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

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

opening, meanwhile shut doors gradually to allow for graceful extry and exit

* SOFT, NO MANUAL CLOSING : let the door close by itself, enjoy self-driven

shutdown and lock, maintain quiet and sureness.