Product Overview

The Dorex 754DU Door Closer (Size 4 Power) is a heavy-duty surface-mounted closer designed for commercial and institutional applications where higher closing force and durability are required. With a strong Size 4 spring and durable construction, it is suitable for exterior doors and high-traffic interior openings.

The DU (Duranodic) finish provides a dark bronze appearance, commonly used on aluminum storefront systems and commercial entrance doors.

Key Features

• Size 4 Spring Power – For heavier or wider commercial doors
• Duranodic (DU) Finish – Dark bronze, ideal for aluminum storefronts
• Heavy-Duty Rack and Pinion Mechanism – Smooth, controlled operation
• Adjustable Sweep & Latch Speed – Independent control valves
• Surface Mounted Design – Compatible with wood, metal, and aluminum doors
• Non-Handed Installation – Suitable for left or right-hand doors

Recommended Applications

• Exterior commercial entrance doors
• Aluminum storefront doors
• Institutional facilities
• Industrial buildings
• High-traffic corridors

Size 4 closers are commonly selected where additional closing force is needed due to wind pressure, door weight, or heavy usage.

Technical Specifications (Typical for Size 4 Closers)

• Door Width Range: Typically up to 42"–48" doors (depending on door weight)
• Mounting Options: 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)

Why Choose a Size 4 Closer?

A Size 4 closer is recommended when:

• The door is wide or heavy
• The opening is exposed to wind
• The application is high traffic
• Consistent latching is critical

This model is ideal for storefront and exterior commercial environments where reliability and stronger closing force are essential.