Colewell's Pull Force Door Dampers work in the opposite direction of standard struts. Instead of pushing out, the piston rod is pulled securely inside the cylinder. This unique mechanism allows them to actively pull heavy sliding doors, industrial gates, or drawers into a fully closed position.
Combined with internal hydraulic damping, these units act as a soft-close system. They catch the moving door, slow it down gently, and pull it shut silently, preventing slams, finger injuries, and damage to the frame.
| Traction Force | 50N - 2000N. Adjustable pull strength to match light drawers or heavy industrial fire doors. |
| Damping Function | End Damping: Slows down the retraction speed at the end of the stroke for a silent, soft closure. |
| Material Build | Cylinder: Powder Coated Steel or 304/316 Stainless Steel. Rod: Hard Chrome Plated for smooth retraction. |
| Mounting | Installation: Must be installed so the rod is pulled out when the door is open. The spring tension pulls it back. |
The internal spring is under tension when extended. When the door is released, the pull force damper automatically retracts, ensuring the door never stays ajar.
We can customize the retraction speed. Fast retraction for emergency gates, or slow, viscous damping for luxury furniture drawers.
Tested to withstand 50,000+ pull cycles. High-quality seals prevent dust ingress, making them suitable for workshop environments.
• Size: Compact diameters (15mm-28mm) to hide within door frames.
• Stroke: Long stroke options for wide sliding doors.
Soft Close: Catches the heavy sliding door just before it hits the frame and pulls it shut silently and securely.
Self-Closing: Used in industrial tool cabinets or server racks to ensure drawers automatically retract when pushed halfway.
Auto-Latch: Ensures industrial safety gates or pool gates pull themselves closed and latch automatically for security.
Assisted Closing: Helps pull down heavy protective covers or overhead guards, reducing operator effort.
Unlike passive dampers, this unit actively retracts to ensure full closure.
Hydraulic resistance eliminates slamming noise and vibration.
Traction force and speed can be tailored to your door weight.
Built to last with high-strength steel and long-life seals.
Ideal for quiet environments like hospitals, offices, and homes.
Install it and forget it. No regular lubrication required.
Colewell Machinery excels in designing specialized pull force door dampers. We solve complex closing challenges for industrial and furniture clients.
With adjustable force options and robust manufacturing, we deliver reliable self-closing solutions that enhance safety and user convenience.
A: A standard gas strut pushes out (extends), while a pull force damper pulls in (retracts). It is used for closing actions rather than lifting.
A: Yes, we offer models with up to 2000N traction force, sufficient for heavy industrial doors and gates.
A: Yes, the built-in hydraulic damping slows the door down as it reaches the closed position, preventing impact.
A: Yes, models with stainless steel bodies or QPQ coating are designed to withstand outdoor weather conditions.
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