Dorma BTS 75V Floor Spring Door Closer EN 1-4 90° Hold-Open for Fire Doors 120kg

Product Overview

The Dorma BTS 75V Floor Spring Door Closer serves as a concealed floor-mounted door closer with adjustable closing force EN 1-4, suitable for both single and double leaf doors in commercial and public interiors. Designed for doors up to 1100 mm wide and 120 kg, it can be used on fire-rated and smoke-proof doors.

Its standout feature is the 90° hold-open mechanism, ensuring the door remains fixed at a right angle?a requirement often found in service corridors, retail, and public access areas. This function reduces the risk of accidental door closure during loading or high-traffic use. With universal handing, the BTS 75V is especially suited for building contractors managing projects with diverse door configurations where consistent hold-open and fire safety requirements must be met.

Key Features

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


• Smooth force adjustment ? hydraulic valve allows precise setting for various door types


• Opening damping ? built-in mechanism controls from 70° to 90°, preventing door slamming against the wall


• Dual closing speed ? independently adjustable for 175°?15° and 15°?0° sectors


• Universal handing ? suitable for left- and right-opening doors without modification


• Hold-open at 90° ? mechanical stop function keeps doors open at right angle


• Fire and smoke door approved ? suitable for fire-rated and smoke-proof door installations

Technical Specifications

• Closing Force: EN 1-4 (adjustable)


• Maximum Door Width: 1100 mm


• Maximum Door Weight: 120 kg


• Hold-Open Angle: 90°


• Opening Damping Range: 70° to 90°


• Closing Speed Adjustment Ranges: 175° to 15° and 15° to 0°


• Compatibility: Single and double leaf doors


• Handing: Universal (left/right)


• Certification: Approved for fire and smoke doors

Applications

Used in commercial facilities, office buildings, hotels, hospitals, and retail environments. Compatible with fire-rated and smoke-control doors, especially where a 90° hold-open is required for accessibility or loading. Supports both single and double door configurations and universal installation for left or right opening.

Packaging & Shipping

Standard export packaging. Unit includes floor spring body, installation accessories, and mounting hardware. Axis spindle and other door-specific hardware are not included unless specified.