Overview
Enhance hotel, luxury residential, and commercial interior architecture with the Heavy-Duty Concealed Hydraulic Overhead Door Closer. Engineered for mortised, slotted installation concealed entirely within the door leaf and frame head, this invisible door closer delivers clean, hardware-free architectural sightlines when the door is closed. Featuring precision rack-and-pinion transmission, adjustable power size EN 2–5, and dual independent closing and latching speed control valves, it provides silent, controlled, and dependable door operation for heavy interior wooden, composite, and metal doors up to 100 kg (220 lbs).

Key Features

• Fully Concealed In-Door Installation: Embedded mortise body and low-profile slide channel track remain completely hidden when the door is shut, eliminating unsightly overhead closer bodies and protruding scissor arms.
• Precision Rack-and-Pinion Hydraulic Mechanism: Heavy-duty heat-treated alloy steel gear teeth and high-grade hydraulic fluid deliver smooth, silent mechanical transmission and thermal stability across varying indoor temperatures.
• Adjustable Closing Force (EN 2–5): Calibrated spring force adjustment allows precise field tuning to accommodate various door widths (850 mm to 1250 mm) and door weights up to 100 kg (220 lbs).
• Dual Independent Speed Regulating Valves:
  • Speed Valve 1 (Closing Speed): Regulates smooth closing deceleration from 120° down to 15°.
  • Speed Valve 2 (Latching Speed): Controls final quiet, positive latching action from 15° down to 0°, overcoming latch resistance without slamming.
• High-Endurance Commercial Life: Tested and verified for over 500,000 operational open/close cycles, ensuring long-term maintenance-free performance in high-traffic commercial environments.
• Universal Non-Handed Design: Symmetrical slotted body engineered for both left-hand and right-hand swinging doors.

Technical Specifications

• Product Type: Concealed Overhead Hydraulic Door Closer / Hidden Slide Track Closer
• Body Material: High-Density Die-Cast Aluminum Alloy & Hardened Alloy Steel Rack/Pinion
• Surface Finish: Natural Satin Silver Anodized / Corrosion-Resistant Primer
• Adjustable Power Size: Spring Force Size EN 2 to EN 5
• Maximum Door Weight: Up to 100 kg (220 lbs)
• Recommended Door Width: 850 mm to 1250 mm (33.5 in to 49.2 in)
• Minimum Door Leaf Thickness: 45 mm (1-3/4 in) required for mortise slotting
• Maximum Door Opening Angle: Up to 120°
• Speed Controls: 2 Independent Valves (Closing Speed 120°–15°, Latching Speed 15°–0°)
• Durability Rating: Tested to 500,000+ operational cycles
• Recommended Applications: Luxury hotel guest rooms, executive offices, commercial entrance doors, high-end residential interior doors, and modern flush-panel doors

Wholesale & OEM Capabilities

• B2B Commercial Procurement: Factory-direct supply for architectural hardware specifiers, commercial general contractors, hospitality procurement groups, and high-end millwork manufacturers.
• OEM/ODM Customization: Custom hold-open slide track arms (optional 90° hold-open block), custom faceplate finishes (Matte Black, Satin Brass, Brushed Stainless), and private-label laser branding.
• Export Packaging: Packed in shockproof molded foam shells inside heavy-duty corrugated cartons complete with full-scale 1:1 installation routing templates and mounting screw packs.