Premium Quality Door Control Solutions

The Dorma BTS 84 Plus Floor Spring is a premium, double-action concealed floor closer engineered by dormakaba. Specially designed to meet the rigorous demands of toughened glass, aluminum, and timber doors, it combines precision manufacturing with maximum functionality. Featuring an ultra-thin 40mm body, it significantly reduces the floor prep depth required, making your commercial installation simpler and more efficient.

Key Performance Specifications

• Heavy-Duty Capacity: Engineered to handle door weights up to 120kg without compromising performance.
• Maximum Door Width: Easily accommodates broad doors up to 1100mm.
• Built-in Pressure Relief Valve: Effectively prevents damage inside the door floor spring body caused by heavy wind conditions or abusive forced closures.
• Thermostatic Consistency: Built-in thermostat maintains stable closing speeds against drastic temperature changes, minimizing the need for manual adjustments and future Dorma BTS 84 replacements.

Versatility and Easy Installation

Whether you require single or double-action operations, the Dorma BTS 84 Plus Floor Spring offers universal adaptability. It features two infinitely variable closing speed control valves (130° to 0° and 130° to 20°), and offers a 90° hold-open option. The interchangeable spindle setup allows you to integrate standard hardware alongside various deep floor finishes such as marble and carpet seamlessly.

Glass Door Application

Perfect for frameless entrance designs, this floor spring works in perfect combination with dormakaba XL patch fittings (such as XL PT10, PT20, and PT30). With environmentally friendly asbestos-free gaskets and a sleek brushed stainless steel finish, you get an aesthetically pleasing and safe mount suitable for 12mm to 15mm tempered glass panels.