Dorma BTS80S-6 Size-6 Double Acting Concealed Floor Door Closer. Body & Case Only. The BTS80 Series of floor- concealed door closers offers adaptability to almost any installation. The closer’s compact body permits its use where a larger closer would be prohibitive. Versatility allows installation in thin slab concrete subfloor construction. A wide selection off. Interchangeable spindles makes the BTS80 suitable for virtually any floor covering or threshold application. Because the BTS80 can control exceptionally heavy single- and double-acting doors, you can incorporate the floor closer into almost any design to meet most materials, size, and weight requirements. Trouble-free performance under adverse climatic and traffic conditions makes the BTS80 floor-concealed closer dependable and a perfect choice for even the most rigorous applications. For total control and uncompromising creativity for any door opening, specify a BTS80 floor-concealed closer. All floor-concealed door closers shall be DORMA BTS80 Series employing a cam and roller mechanism. The closers shall be capable of controlling interior or exterior doors weighing up to 660 lb and measuring up to 4′-0″ wide exterior and 4′-6″ interior. The closers will have selectable multipoint hold open between approximately 75o and 175o. The closers will have. Selectable delayed action to allow delayed closing from 175o to 75o. The closers will have mechanical backcheck at approximately 70o. Dual valve adjustment will provide controlled closing speed from approximately 175o opening range, even in cold temperature conditions. The closer will provide adjustment within the cement case to allow lateral and longitudinal adjustment of 1/4″ and vertical height adjustment of 5/32″. Field interchangeable spindles will be available to provide bottom door clearances ranging from 5/16″ to 2-5/16″. Listing and template services provided by inkFrog.