DORMA BTS 75V Floor Spring Door Closer EN 1-4 Adjustable for Fire and Smoke Doors

Product Overview

The Dorma BTS 75V floor spring is suitable for single- and double-leaf doors in commercial and institutional settings, supporting fire-rated and smoke-control door assemblies. With adjustable closing force in the EN 1-4 range, it accommodates door wings up to 1100 mm wide and up to 120 kg. The model incorporates a built-in opening damping mechanism to minimize impact and is configured for universal handing, allowing flexible installation regardless of door orientation.

Distinctively, the BTS 75V offers smooth hydraulic adjustment of closing speed through its valve system, enabling precise control from 175° down to closed, as well as targeted speed regulation in the final closing phase. This feature helps eliminate compliance risk with fire and smoke door regulations by ensuring reliable closure in demanding environments. It is particularly well-suited for specifying in projects requiring certified floor spring functionality on fire-rated doors in office, hotel, and public building sectors.

Key Features

• Adjustable closing force EN 1-4 ? allows setup for door widths up to 1100 mm and weights up to 120 kg


• Hydraulic closing speed regulation ? dual-phase adjustment from 175° to 0° for optimized safety and function


• Built-in opening damping ? protects door and surrounding walls from accidental impacts between 70° and 90°


• Universal handing ? supports both left- and right-opening doors, simplifies installation in mixed environments


• Approved for fire and smoke doors ? eliminates regulatory risk for life safety applications


• Supports single- and double-leaf doors ? flexible choice across commercial and public sector projects

Technical Specifications

• Closing Force: EN 1-4 (adjustable)


• Maximum Door Width: 1100 mm


• Maximum Door Weight: 120 kg


• Closing Speed Regulation: Adjustable (175° to 15°, 15° to 0°)


• Opening Damping Range: 70° to 90°


• Handing: Universal (left or right)


• Application: Fire-rated and smoke-control door assemblies

Applications

Appropriate for floor installation on single- or double-leaf doors in office buildings, hotels, retail spaces, and public facilities. Compliant for use on fire-rated and smoke-control doors, supporting life safety and regulatory requirements. Enables OEM procurement and bulk installation for new construction and retrofit projects in commercial environments.

Packaging & Shipping

Standard export packaging. Package includes Dorma BTS 75V floor spring, adjustment valve, mounting hardware, and installation instructions.