Alpro PRO50 Heavy Duty Short Side Load Closer NHO

Alpro 510390T3-U PRO50 heavy duty (size 3) concealed transom closer with short side load arm (51A1), no hold open configuration. Designed for single or double action aluminium doors up to 1150mm wide and 100kg, with a 65mm pivot point (using 51A5 F bracket) or 70mm pivot point.

Installs concealed within the transom header bar. The 51A1 short side load arm is designed for use with the 51A5 F bracket at a 65mm pivot centre. All fixing threads should be applied with Loctite 222 or similar. Extended spindle options of 17mm, 22mm and 28mm are available by modifying the order code.

About This Product

The Alpro 510390T3-U is a heavy duty concealed transom closer from the PRO50 range, supplied with a short side load top arm assembly (51A1) for installations requiring a 65mm pivot point with the 51A5 F bracket. It is intended for commercial aluminium door installations where space constraints or frame design require the short arm variant. Choose this product for heavy traffic doors up to 1150mm wide where a short side load arm is specified.

Key Features

• Heavy duty size 3 — doors up to 1150mm wide, 100kg max weight
• Concealed within transom header bar — 293mm x 90mm x 37mm
• Short side load arm (51A1) included for 65mm pivot with 51A5 F bracket
• No hold open configuration
• Adjustable dual closing speed (initial and latching)
• Stable hydraulic fluid suitable for most climatic conditions
• Extended spindle options available (17mm, 22mm, 28mm)
• Compatible with 51A10 heavy duty bottom pivot for doors up to 120kg

Technical Specifications

• Duty Rating: Heavy Duty (Size 3)
• Max Door Width: 951mm – 1150mm
• Max Door Weight (Standard Pivot): 100kg
• Max Door Weight (Heavy Duty Pivot 51A10): 120kg
• Max Door Height: 2540mm
• Pivot Point: 65mm (with 51A5) / 70mm
• Arm Type: Short Side Load (51A1)
• Hold Open: No
• Standard Spindle Length: 12mm
• Closer Dimensions: 293mm x 90mm
• Concealed Thickness: 37mm
• Closing Speed: Dual adjustable (initial and latching)

Common Questions

• What is the difference between T3 and T1? T3 includes a short side load arm (51A1) for 65mm pivot with 51A5 F bracket; T1 includes a standard side load arm (51A2) for 70mm pivot.
• Do I need the 51A5 F bracket? Yes — the 51A1 arm is designed for use with the 51A5 F bracket for 65mm pivot installations. It is available separately.

Compatibility

• Single and double action aluminium doors
• 51A1 short side load top arm assembly (included)
• 51A4 bottom pivot assembly (included)
• 51A5 F bracket (required for 65mm pivot, available separately)
• 51A10 heavy duty bottom pivot (available separately)

Dimensions

• Closer Body: 293mm x 90mm x 37mm