Dorex 785AL Door Closer #4 Power Aluminum Doors w/Backcheck
785ALThe DOREX 700 Series fixed power door closer is recommended by door hardware specialists for use on a wide variety of residential and commercial applications with moderate traffic.
Product Overview
The Dorex 785AL Door Closer (Size 5 Power) is an extra heavy-duty commercial door closer built for wide, heavy, and high-traffic doors. Designed for demanding exterior and institutional environments, this model includes integrated backcheck to reduce damage from forceful opening or wind pressure.
The Aluminum (AL) finish provides a clean, neutral appearance suitable for commercial, industrial, and institutional applications.
Key Features
- Size 5 Spring Power – Maximum closing force for heavy and oversized commercial doors
- Integrated Backcheck – Cushions the door during opening to protect frames and hardware
- Aluminum Finish (AL) – Standard commercial silver finish
- Heavy-Duty Rack and Pinion Mechanism – Smooth, controlled closing performance
- Adjustable Sweep & Latch Speed – Independent valve adjustments
- Surface Mounted Design – Suitable for wood, hollow metal, and aluminum doors
- Non-Handed Installation – Compatible with left- or right-hand doors
Recommended Applications
- Exterior commercial entrance doors
- Industrial and warehouse facilities
- Institutional buildings
- High-wind exposure locations
- Very high-traffic openings
Technical Specifications (Typical for Size 5 Closers with Backcheck)
- Door Width Range: Typically up to 48" and larger (depending on door weight and site conditions)
- Mounting Type: Standard surface mount (regular arm)
- Material: Cast aluminum body
- Adjustments: Sweep speed, latch speed, and backcheck
- Arm Type: Standard arm included
- Finish: Aluminum
Why Choose Size 5 with Backcheck?
Select the 785AL when:
- The door is wide, heavy, or oversized
- Strong wind conditions affect door control
- Traffic volume is very high
- Maximum durability and consistent latching are required
The Dorex 785AL delivers powerful closing force combined with backcheck protection, making it ideal for demanding commercial and industrial environments.
- For moderate traffic applications
- cULus listed
- 5 Year limited warranty
- Fixed power size 1, 2, 3, 4, or 5
- Non-handed
- Cast aluminum alloy body
- Hydraulic rack & pinion mechanism
- Non-gumming, non-freezing hydraulic fluid
- 180° maximum opening
- Adjustable sweep and latching speeds
- Tri-pack for regular, top jamb or parallel arm installations
- Adjustable cushioning backcheck models available
- Drop plates available
Product Page
Instructions
751 – Installation Instructions
752 – Installation Instructions
753 – Installation Instructions
754/755, 784/785 – Installation Instructions
Templates
751 – Regular Arm / Top Jamb
751 – Parallel Arm
752 – Regular Arm / Top Jamb
752 – Parallel Arm
753 – Regular Arm / Top Jamb
753 – Parallel Arm
754/755, 784/785 – Regular Arm / Top Jamb
754/755, 784/785 – Parallel Arm
Disclaimer
- We recommend that physical hardware be ordered and verified before starting any preparation, manufacturing or installation work.
- All product installations must be done by qualified personnel using the proper mounting hardware for the appropriate surface or material.
- We recommend that installers and manufacturers use the instructions inside the packaging provided by the manufacturer, as the manufacturer reserves the right to make technical changes, modify product or information without prior notice.
- Do not exceed the maximum weight or dimensions recommended by the manufacturer.
- All technical documents, drawings and instructions are provided as-is. Customers (primary or secondary) cannot derive any claim based on the use of these documents. No responsibility is or will be assumed.