ABOUT THIS FLOOR SPRING
The BTS80 EN4 Floor Spring System – Non Hold Open (NHO) is a concealed floor mounted door closer system designed for medium to heavy duty pivot doors.
This system is installed below floor level, providing a clean architectural finish while delivering smooth and controlled door movement.
The Dormakaba BTS80 system is designed for a wide range of door applications and is capable of handling large doors up to 1400mm wide and up to ±300kg, depending on configuration.
This EN4 version is ideal for standard commercial entrances and medium-to-heavy aluminium or glass doors.
This unit is supplied as a complete system, including floor spring and pivot hardware.
KEY FEATURES
Brand: Dormakaba
Model: BTS80
SKU: BTS80 EN4 (NHO)
Function: Non Hold Open (NHO)
Door Closer Type: Floor Spring System
Mechanism: Cam Action Hydraulic
Operation: Double Action (Opens Both Directions)
EN Rating: EN4
Maximum Door Width: 1400mm
Maximum Door Weight: Up to 300kg
Installation: Floor Mounted (Concealed)
Finish: Stainless Steel Cover Plate
Application: Commercial Doors
HOLD OPEN OR NON HOLD OPEN
This product is the Non Hold Open (NHO) version.
Hold Open (HO)
Allows the door to remain open at approximately 90°.
Common in retail and public entrances.
Non Hold Open (NHO)
The door always returns to the closed position automatically.
Typically required for fire-rated and controlled access doors.
WHAT IS INCLUDED IN THIS SYSTEM?
This is a complete floor spring system, not just a mechanism.
Included:
• BTS80 EN4 floor spring
• Top centre (8062)
• Bottom strap (7422)
• Spindle and fixing components
This ensures full compatibility and correct installation.
WHAT IS A FLOOR SPRING SYSTEM?
A floor spring system is installed inside the floor beneath the door, allowing:
• Smooth controlled closing
• Double action movement (both directions)
• Fully concealed installation
This makes it ideal for glass and aluminium shopfront doors.
SUITABLE FOR
• Glass shopfront doors
• Aluminium entrance doors
• Timber pivot doors
• Commercial buildings
• Office entrances
Door Materials
• Glass doors
• Aluminium doors
• Timber doors
HOW TO CHOOSE THE CORRECT FLOOR SPRING
Floor springs are selected based on door weight and size:
Up to 100kg → BTS75 / QS860
100–150kg → QS880 / QS895
150–200kg → QS899V
200kg+ → BTS80 EN4 / EN6
👉 EN4 = standard heavy duty
👉 EN6 = extreme heavy duty
INSTALLATION INFORMATION
This system is installed:
• Inside the floor (cement box)
• With top and bottom pivot points
Requires:
• Floor pocket preparation
• Accurate door alignment
• Correct spindle positioning
Professional installation is strongly recommended.
WHAT'S INCLUDED
• BTS80 EN4 floor spring
• Top centre (8062)
• Bottom strap (7422)
• Fixing components
• Installation instructions
FLOOR SPRING QUICK SELECTION GUIDE
| Door Type | Door Weight | Recommended System |
|---|---|---|
| Light pivot doors | Up to 100kg | BTS75 / QS860 |
| Medium pivot doors | 100–150kg | QS880 / QS895 |
| Heavy pivot doors | 150–200kg | QS899V |
| Extra heavy doors | 200kg+ | BTS80 EN4 / EN6 |
NEED HELP CHOOSING A FLOOR SPRING?
Not sure which system you need?
Send us your door size, weight or a photo, and we will recommend the correct setup.
If you are unsure which product is suitable, please contact The Stickman Store and we will gladly assist.
Email: hello@thestickman.co.za
Call / WhatsApp: 082 508 7708
