Attributes

Brand	-
Category	Basic Building Materials / Floor Springs
Origin	-
Brand	CROWN
Model Number	Shanghai N-818
Material	High-Strength Aluminum Alloy
Application	Glass Doors (Framed/Frameless) and Aluminum Alloy Doors
Max Door Weight	100 kg (220 lbs)
Max Door Width	950 mm
Function	Hydraulic Closing with Optional Hold-Open
Installation Type	Floor Mounted (Concealed)
Finish	Silver Anodized
Warranty	2 Years Manufacturer Warranty

6 reviews

Anonymous

Mar 29, 2026

Rating: 3/5

Works well but adjustment is tricky

The mechanism is solid, but adjusting the closing speed took several tries to get right. Once set, it has been working fine for three months.

Anonymous

Mar 26, 2026

Rating: 5/5

Sturdy and silent

Replaced an old noisy hinge with this CROWN N-818. It is completely silent now and feels very robust. Highly recommended for commercial use.

Anonymous

Mar 21, 2026

Rating: 5/5

Reliable hold-open feature

We needed the hold-open function for our restaurant entrance, and this model performs flawlessly. It holds the door at 90 degrees firmly until pushed slightly.

Anonymous

Mar 19, 2026

Rating: 4/5

Good value, installation takes time

The spring works great once installed. Just be prepared that digging out the floor cavity for the unit requires some effort. Instructions could be clearer.

Anonymous

Mar 09, 2026

Rating: 5/5

Excellent durability

We have high traffic in our retail store, and these springs have handled thousands of cycles without any loss in performance. Great product.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for heavy glass doors

Installed this on a 12mm frameless glass door in our office lobby. The closing action is smooth and consistent. Very happy with the build quality.

5 FAQ

Q: Does this come with the hold-open feature enabled by default?

A: The unit supports the hold-open function, but please check the specific SKU you are purchasing. Some versions are sold as 'with hold-open' and others as 'standard closing only'.

Q: What is the minimum floor depth required for installation?

A: You will need a floor cavity depth of approximately 170mm to properly house the main body of the N-818 floor spring.

Q: Is this suitable for a 10mm tempered glass door?

A: Yes, the CROWN N-818 is designed to work with both framed and frameless glass doors ranging from 8mm to 12mm thickness.

Q: Can I adjust the closing speed myself?

A: Yes, there are adjustment valves on the top cover plate that allow you to regulate the closing speed and latching action using a standard screwdriver.

Q: Is this compatible with aluminum alloy frames?

A: Absolutely. This model is specifically engineered to support both all-glass doors and doors with aluminum alloy frames.

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