Alpro PRO50 Heavy Duty End Load Transom Closer NHO

Alpro 510390T2-U PRO50 heavy duty (size 3) concealed transom closer with end load arm (51A3), no hold open configuration. Suitable for single or double action aluminium doors up to 1150mm wide and 100kg, with a 70mm pivot point and adjustable dual closing speed. The end load arm is designed for use with roundnose stile profiles.

Installs concealed within the transom header bar. The 51A3 end load arm assembly is included for roundnose stile applications. 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 510390T2-U is a heavy duty concealed transom closer from the PRO50 range, supplied with an end load top arm assembly (51A3) for roundnose stile door frames with a 70mm pivot point. It is designed for installers working with commercial aluminium doors where a concealed closer is required on heavy traffic doors up to 1150mm wide. Choose this variant when the door frame has roundnose stiles requiring an end load arm configuration.

Key Features

• Heavy duty size 3 — doors up to 1150mm wide, 100kg max weight
• Concealed within transom header bar — 293mm x 90mm x 37mm
• End load arm (51A3) included for roundnose stile profiles
• 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: 70mm
• Arm Type: End Load (51A3)
• 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 T1 and T2? T1 includes a side load arm (51A2); T2 includes an end load arm (51A3) for roundnose stile profiles.
• Can I upgrade to hold open? No — this is the NHO variant. Order the 90 suffix version for hold open.
• What spindle lengths are available? Standard 12mm included; 17mm, 22mm and 28mm available via modified order codes.

Compatibility

• Single and double action aluminium doors with roundnose stiles
• 51A3 end load top arm assembly (included)
• 51A4 bottom pivot assembly (included)
• 51A5 F bracket (available separately for 65mm pivot)
• 51A10 heavy duty bottom pivot (available separately)

Dimensions

• Closer Body: 293mm x 90mm x 37mm