This JNF Concealed Hydraulic Overhead Door Closer is a high-performance architectural solution designed for seamless integration into single-action doors. Engineered for those who prioritize a minimalist aesthetic without sacrificing functionality, this unit remains hidden within the door leaf and frame, providing a clean, modern look for premium interior environments.
Key Features
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Discreet Concealed Design: Fits internally within the door and frame to maintain the architectural integrity and “clean lines” of the entrance.
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Precision Hydraulic Control: Utilizes a high-quality rack and pinion mechanism to ensure smooth, consistent, and reliable door operation.
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Dual-Valve Adjustment: Features independent valves to precisely calibrate both the closing speed and the latching speed, allowing for a customized closing transition.
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Versatile Functionality: Equipped with a sliding arm and a removable hold-open system, offering flexibility for high-traffic areas where doors need to remain open periodically.
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Durable Lightweight Construction: Manufactured from high-grade aluminum, providing excellent strength-to-weight ratio and long-term corrosion resistance.
Specifications
| Attribute | Detail |
| Model | ML.21.800 |
| Brand | JNF |
| Hardware Type | Concealed Hydraulic Overhead Door Closer |
| Mechanism | Rack and Pinion / Sliding Arm |
| Power Size | 3 |
| Max Door Width | 950 mm |
| Max Door Weight | 65 kg |
| Opening Angle | 120Âş |
| Material | Aluminium |
| Origin | Made in Portugal |



