Ozone Floor Spring Complete Set FS-8400

Ozone FS-8400 Floor Spring – Heavy-Duty Floor Spring for Up to 80 Kg Doors

The Ozone FS-8400 Floor Spring provides smooth and controlled closing for medium to heavy doors. Its concealed floor-mounted design keeps most of the mechanism out of sight. Therefore, it offers reliable door control without adding bulky hardware to the door surface.

Designed by Ozone, the FS-8400 floor spring supports doors weighing up to 80 kg. It works with doors up to 950 mm wide. As a result, it is a practical choice for busy residential and commercial spaces.

The FS-8400 uses an EN3 cam-action mechanism with a double-cylinder design. Moreover, you can adjust both the closing and latching speeds for better door control.

Explore our complete range of floor springs to compare models for different door weights and applications.

Why Choose the Ozone FS-8400 Floor Spring?

The Ozone FS-8400 combines a concealed design with strong closing performance. Its cam-action system controls the door throughout the closing movement.

In addition, the double-cylinder mechanism improves durability. This makes the floor spring suitable for doors that see regular daily use.

The FS-8400 also allows separate adjustment of the closing and latching speeds. Therefore, installers can fine-tune the door movement after installation.

Key Features

• Supports doors weighing up to 80 kg
• Suitable for doors up to 950 mm wide
• EN3 closing force
• Heavy-duty cam-action floor spring
• Double-cylinder mechanism
• Adjustable closing speed
• Adjustable latching speed
• Smooth and controlled door movement
• Concealed floor-mounted design
• Tested for 500,000 cycles
• EN 1154 tested
• UL & CE certified
• High-grade SS 304 cover available
• Suitable for framed doors
• Designed for medium to high-traffic areas

Heavy-Duty Floor Spring for Busy Doors

The Ozone FS-8400 heavy-duty floor spring works well in spaces where doors open and close many times during the day.

Its double-cylinder mechanism adds strength and improves long-term performance. Therefore, Ozone recommends this model for medium to high-traffic doors.

Once someone releases the door, the floor spring controls its return movement. As a result, the door closes more smoothly and with less sudden movement.

This makes the FS-8400 useful for offices, shops, showrooms, hotels and other commercial interiors.

For more options, browse our complete collection of door closing systems.

Cam-Action Floor Spring for Smooth Door Movement

The Ozone FS-8400 uses a cam-action closing system.

The cam mechanism helps control the movement of the door during opening and closing. Therefore, the door feels smoother during regular use.

This system also provides EN3 closing force, which suits doors within the recommended weight and width.

Moreover, the concealed mechanism keeps the main floor spring body below floor level. Only the cover plate remains visible after installation.

Adjustable Closing and Latching Speed

Different doors may need different closing settings. For this reason, the Ozone FS-8400 offers separate speed adjustments.

The closing speed adjustment controls the main movement of the door towards the frame.

Meanwhile, the latching speed adjustment controls the final part of the closing action.

Together, these settings help create smoother and more controlled door movement. They also allow the installer to adjust the floor spring according to the door and site conditions.

Floor Spring for Doors Up to 80 Kg

Choosing a floor spring according to door weight is important for reliable performance.

The Ozone FS-8400 supports doors weighing up to 80 kg and measuring up to 950 mm wide. Therefore, it suits many medium to heavy doors.

However, always check the actual door weight and width before choosing a floor spring.

A lighter door may need a lower-capacity model. On the other hand, a larger or heavier door may require a stronger floor spring.

Browse our floor spring collection to compare Ozone, Dorset and other options for different door sizes.

Double-Cylinder Floor Spring

The FS-8400 double-cylinder floor spring is designed for stronger and more dependable everyday operation.

Its two-cylinder mechanism improves durability under frequent use. Therefore, it is well suited to high-traffic commercial spaces.

Ozone has also tested the FS-8400 for 500,000 operating cycles. This makes it a strong option for projects where doors need reliable closing throughout the day.

Tested and Certified Performance

The Ozone FS-8400 meets recognised performance standards for door closing systems.

It is EN 1154 tested and carries UL and CE certification. In addition, Ozone has tested the mechanism for 500,000 cycles.

These specifications make the FS-8400 suitable for projects where performance and long-term reliability matter.

Concealed Floor Spring vs Overhead Door Closer

A floor spring sits below the door and floor level. Therefore, it creates a cleaner appearance than a surface-mounted overhead closer.

It is particularly useful when you need strong door control without fitting a visible closer body at the top of the door.

In contrast, a standard arm door closer mounts directly on the door or frame. It remains visible but provides easier access for servicing and adjustment.

Therefore, your choice should depend on the door weight, width, traffic level and design requirements.

Available Finishes

Ozone offers the FS-8400 in several finishes to suit different door and interior styles. Options include Satin Stainless Steel, Black Matt, Phantom Grey, Tan Brass, Antique Brass, Wooden finish, Gold Matt PVD and Rose Gold Matt PVD.

Therefore, you can coordinate the visible cover plate with the surrounding door hardware and interior finishes.

Buy Ozone FS-8400 Floor Spring Online in India

Choose the Ozone FS-8400 Floor Spring if you need a dependable heavy-duty floor spring for doors up to 80 kg.

Its EN3 cam-action mechanism, double-cylinder design and adjustable closing speeds provide controlled everyday performance. Moreover, its 500,000-cycle testing makes it suitable for regular use in busy spaces.

Shop Ozone floor springs online in India at That Hardware Store and explore floor-mounted door closing solutions for homes, offices, shops, hotels and commercial projects.