Overview

The Ningbo Dimon Extra Heavy-Duty Commercial Hydraulic Door Closer is engineered for maximum load-bearing performance on massive exterior portals, heavy fire-rated steel doors, armored entrances, and high-traffic industrial facilities. Built to effortlessly control doors weighing up to 250 kg (550 lbs), this commercial-grade closer features field-adjustable spring power from Size 1 to Size 6, allowing precise calibration to meet site-specific wind resistances and accessibility requirements. Engineered with independent hydraulic valves for closing speed, latching speed, and backcheck (BC) cushioning, it delivers uncompromising security, long-lasting durability, and controlled architectural door closure.

Key Features

• Massive 250 kg (550 lbs) Load Rating: Heavy-duty internal engineering accommodates extra-wide and heavy commercial steel, fire, and timber doors up to 250 kg.
• Field-Adjustable Spring Force (Size 1–6): Easily calibrate closing resistance across 6 power levels via end-cap hex adjustment (2.5 turns per power level) to overcome building stack pressure and exterior wind loads.
• Three-Stage Precision Hydraulic Controls:
  • Sweep Speed Regulation (180° to 15°): Controls primary smooth door swing.
  • Latch Speed Regulation (15° to 0°): Ensures positive latch bolt engagement without harsh slamming.
  • Hydraulic Backcheck (BC Cushioning, 60° to 90°): Absorbs aggressive opening momentum and wind gusts, preventing structural frame impact and wall collision.
• Protective Architectural Full Cover: Full-length metallic cover encloses the closer body and mounting screws for a sleek, contemporary appearance and superior tamper resistance.
• Universal Handing & Mounting: Fully reversible non-handed design fits both left-hand and right-hand swinging doors for standard pull-side and push-side installations.
• All-Climate Hydraulic Reliability: Packed with high-viscosity-index hydraulic fluid that prevents sluggish operation or fluid leakage across severe temperature swings (-30°C to +50°C).

Technical Specifications

• Product Name: Extra Heavy-Duty Commercial Hydraulic Door Closer
• Spring Power Rating: Adjustable Size 1 through 6
• Maximum Door Weight: Up to 250 kg (550 lbs)
• Maximum Door Width: Up to 1600 mm (approx. 63")
• Closing Speed Regulation: Dual valve independent control (Sweep: 180°–15°, Latch: 15°–0°)
• Backcheck Function: Adjustable hydraulic backcheck buffer (60°–90°)
• Body Material: High-strength die-cast aluminum alloy with heavy-gauge forged steel articulating arm
• Handing: Non-handed / Fully reversible (Left or Right hand)
• Available Finish: Satin Silver / Powder-Coated Aluminum with matching architectural full cover
• Package Contents: Heavy-duty hydraulic closer body, full protective cover, forged arm assembly, mounting bracket, heavy-duty fastening screws, and hex key

Wholesale & OEM Capabilities

Ningbo Dimon Metal Products Co.,Ltd is a direct hardware manufacturer providing specialized solutions for commercial door fabricators, architectural contractors, and global hardware distributors:

• Tiered Volume Pricing: Competitive export pricing with scalable volume discounts for container and project-based wholesale orders.
• Custom Architectural Options: Custom protective covers, specialized finishes (Matte Black, Dark Bronze), and OEM laser branding available for project specifications.
• Heavy-Duty Export Packaging: Shock-absorbent foam-lined inner packaging with reinforced master cartons to ensure pristine arrival across international logistics channels.