Description
Reviews
| Brand | - |
| Category | Basic Building Materials / Floor Springs |
| Origin | - |
| Brand | GMT |
| Model Series | H-220B+ / N-818 |
| Door Weight Capacity | Up to 140 kg (308 lbs) |
| Material | Cast Iron with Steel Components |
| Finish | Silver Chrome Plated |
| Mounting Type | Concealed Floor Mount |
| Adjustable Closing Speed | Yes, Dual Valve Control |
| Backcheck Function | Included for Wind Protection |
| Suitable Door Width | Up to 1100 mm |
| Warranty Period | 2 Years Manufacturer Warranty |
Anonymous
Mar 27, 2026
Rating: 5/5
Heavy duty and reliable
Installed this on a heavy glass entrance door for our office. The build quality is exceptional, and the hydraulic action is very smooth. It handles the weight effortlessly.
Anonymous
Mar 26, 2026
Rating: 5/5
Perfect replacement part
Needed an authentic GMT unit to replace an old failing one. This model fit exactly into the existing cavity. No more slamming doors!
Anonymous
Mar 19, 2026
Rating: 5/5
Smooth operation in high traffic
We use this in a retail store with hundreds of people passing through daily. After six months, it still operates as smoothly as day one. Highly recommended.
Anonymous
Mar 16, 2026
Rating: 4/5
Solid construction
Very robust unit. The chrome finish looks professional. Only giving 4 stars because the instruction manual could be more detailed regarding the valve adjustments.
Anonymous
Mar 15, 2026
Rating: 5/5
Excellent value for money
Compared to other brands in this category, the GMT offers superior durability at a fair price. The backcheck feature prevents the door from hitting the wall during windy days.
Anonymous
Mar 08, 2026
Rating: 4/5
Great product, installation requires care
The floor spring works perfectly once installed. Make sure you have the right tools and follow the template precisely. The adjustable speed valves are a nice touch.
Q: What is the maximum door weight this model can support?
A: This specific model supports doors weighing up to 140 kg (approximately 308 lbs). For heavier doors, please consult our industrial series.
Q: Can I adjust the closing speed myself after installation?
A: Absolutely. There are two adjustment valves on the unit that allow you to fine-tune the closing speed and latching action using a standard screwdriver.
Q: Does this come with the mounting box and template?
A: Yes, the package includes the floor spring unit, a galvanized steel mounting box, an installation template, and all necessary fixing screws.
Q: Is this floor spring suitable for double acting doors?
A: Yes, the GMT H-220B+ series is designed specifically for double acting doors, allowing them to swing open in both directions and close automatically.
Q: Is this compatible with glass doors without frames?
A: Yes, provided you use the appropriate glass door patches or clamps. The floor spring itself mounts into the floor, while the top pivot connects to the door patch.
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