Dorex 753DU Door Closer #3 Power Duranodic Interior Doors
753DUThe 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 753DU Door Closer (Size 3 Power) is a medium-duty commercial door closer designed for standard interior and light exterior applications. Offering balanced closing force and durability, Size 3 is one of the most commonly specified spring sizes for commercial doors.
The DU (Duranodic) finish provides a dark bronze appearance, making it a popular choice for aluminum storefront systems and commercial entrances requiring a darker architectural finish.
Key Features
- Size 3 Spring Power – Ideal for standard commercial doors
- Duranodic (DU) Finish – Dark bronze finish for storefront and architectural applications
- Rack and Pinion Operation – Smooth and consistent performance
- Adjustable Sweep & Latch Speed – Independent control valves
- Surface Mounted Design – Compatible with wood, hollow metal, and aluminum doors
- Non-Handed Installation – Suitable for left or right-hand doors
Recommended Applications
- Interior commercial office doors
- Retail and storefront interior doors
- Light-duty exterior doors (depending on door width and wind conditions)
- Institutional facilities
Technical Specifications (Typical for Size 3 Closers)
- Door Width Range: Typically up to 36"–42" (depending on door weight and exposure)
- Mounting Type: Standard surface mount (regular arm)
- Material: Cast aluminum body
- Adjustments: Sweep speed and latch speed valves
- Arm Type: Standard arm included
- Finish: Duranodic (Dark Bronze)
When to Choose Size 3
Select a Size 3 closer when:
- The door is a standard commercial width
- Traffic is moderate to high
- More closing force is needed than Size 1 or Size 2
- A balanced, all-purpose commercial closer is required
The 753DU provides reliable performance for typical commercial applications where consistent latching and durability are essential.
- 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.