Overview
The Ultra-Thin 23mm Concealed Hydraulic Door Closer with Guide Slide Track is an architectural-grade invisible door control system engineered for flush interior timber and metal doors. Featuring a streamlined, ultra-compact 23 mm (0.9") body profile, this concealed closer mortises seamlessly into the top door leaf or overhead transom frame, remaining 100% invisible when the door is closed. Built with high-strength extruded aluminum alloy housing, dual-stage independent hydraulic speed regulation (closing and latching), and an integrated low-friction slide channel with an adjustable hold-open positioning block, it provides silent, controlled, and anti-slam closing performance for doors weighing 40 kg to 60 kg (88 lbs to 132 lbs).

Key Features

• Ultra-Thin 23mm Slim Mortise Profile: Compact 23 mm (0.9") body width allows effortless concealment in standard interior wooden and metal doors without compromising the structural integrity of the door core.
• Complete Concealed Architecture: Both the hydraulic cylinder body and the guide track mortise cleanly into the door leaf and frame, preserving minimalist architectural lines and flush aesthetic door aesthetics.
• Dual-Stage Independent Hydraulic Speed Valves: Precision needle valves allow independent adjustment of both the initial closing speed (120°–15°) and final latching buffer speed (15°–0°) to ensure silent closure and positive latch engagement.
• Integrated Slide Track with Hold-Open Function: Features an extruded aluminum guide slide track (460 mm length) with an adjustable positioning stopper, allowing doors to stay open securely at chosen angles or close automatically.
• Engineered Heavy-Duty Capacity (40kg–60kg): High-precision internal piston and premium hydraulic oil ensure consistent damping across broad operating temperatures (-20°C to +50°C), supporting doors up to 60 kg (132 lbs) and 950 mm (37.4") width.
• Non-Handed Reversible Design: Universal internal mechanism accommodates both left-hand and right-hand swinging interior doors.

Technical Specifications

• Product Type: Ultra-Thin Concealed Hydraulic Door Closer with Slide Track
• Material: High-Strength Extruded Aluminum Alloy Body, High-Tensile Steel Slide Arm & Pinion
• Finish: Anodized Sand Silver (Satin Aluminum)
• Body Dimensions: 230 mm (L) x 55 mm (H) x 23 mm (W) (Mounting plate length: 275 mm)
• Slide Track Dimensions: 460 mm (L) x 20 mm (H) x 30 mm (W)
• Applicable Door Weight: 40 kg – 60 kg (88 lbs – 132 lbs)
• Applicable Door Width: Up to 950 mm (37.4")
• Minimum Door Thickness: ≥ 40 mm (1.57")
• Maximum Opening Angle: Approx. 120°
• Net Weight: Approx. 1.58 kg (3.48 lbs)
• Kit Contents: 1x Concealed Hydraulic Closer Body, 1x Aluminum Slide Guide Track, 1x Slide Arm with Roller & Positioning Block, Mortise Mounting Screws, and Adjustment Hex Wrench
• Applications: Hotel guest rooms, executive offices, modern residential flush interior doors, concealed hidden doors, and commercial interior partitions

Wholesale & OEM Capabilities

• Direct Factory Supply: Precision manufactured by Ningbo Dimon for door fabricators, hospitality contractors, and architectural hardware distributors.
• OEM Customization: Custom anodized finishes (Matte Black, Champagne Gold, Gunmetal Gray), custom hold-open vs. non-hold-open slide blocks, and private-label laser etching.
• Export Packaging: Packed 1 set per protective inner box, 10 sets per master export carton (Gross weight approx. 17 kg / master carton), compliant with international sea and air shipping standards.