NHN 1628 Concealed Door Closer

NHN 1628 Concealed Door Closer

The NHN 1628 is an ultra-slim concealed hydraulic door closer designed for internal doors where the door-control mechanism needs to remain hidden. Its 28 mm body is designed for installation inside thin aluminium, steel and wooden door constructions.

Technical specifications

• Model: 1628 / 1628U
• Body width: 28 mm
• Applicable door size: up to 900 × 2100 mm
• Door weight: 25–45 kg
• Opening angle: 180°
• Hold-open: Yes
• Sweep speed adjustment: Yes
• Latch speed adjustment: Yes
• Concealed arm: Yes
• Installation: standard or reverse
• Application: internal doors

Design and operation

The concealed installation keeps the main body and arm out of sight when the door is closed. Hydraulic control provides smooth closing, while separate speed adjustments allow the closing movement to be tuned to the installation.

SEO article

The NHN 1628 concealed door closer is a compact hydraulic solution for modern internal doors where a clean architectural appearance is important. With its ultra-slim 28 mm body, the closer can be integrated into thin aluminium, steel and wooden doors while keeping the mechanism hidden.

The NHN 1628 supports doors up to 900 mm wide and 45 kg, with a 180° opening angle. Sweep and latch speeds can be adjusted, and the hold-open function allows the door to remain open when required. Standard and reverse installation are supported, making the 1628 suitable for a range of concealed door-control applications.