Dorma BTS80 Series Floor-Concealed Door Closer

The BTS80 Series of floor-concealed door closers offer 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 of interchangeable spindles makes the BTS80 suitable for virtually any floor covering or threshold application.

Versatile and adaptable
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.

Applications
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.

PRODUCT FEATURES

• Concealed installation
• Fixed spring sizes
• Non-handed for single and double-acting doors
• Mechanical backcheck

TECHNICAL DETAILS

• Compact closer body and cement case 2-3/8" deep suited for thin slab concrete construction.
• Accommodates doors weighing up to 660 lb and 4'-6" wide interior and 4'-0" exterior.
• Closer adjustment in cement case provides lateral and longitudinal adjustment of 1/4" and height adjustment of 5/32".
• A pressure relief valve protects closer from damage caused by forced closing.
• Optional sealing compound SC2 prevents water or cleaning solvent from entering the cement case.
• Closer body is non-handed.
• Mechanical backcheck at approximately 70-deg (excluding size 3, where backcheck is removed to meet barrier-free through 90-deg of opening for easier passage).
• Selectable delayed action between 175-deg and 75-deg. Extends the closing cycle to allow unobstructed passage.
• Delayed action is functional when hold open is not engaged.
• Dual thermostatic control valves combined with special hydraulic fluid provide controlled closing from 175-deg.
• Selectable multipoint hold open between approximately 75-deg and 175-deg.
• Adjustment for start of hold open range or when delayed action releases. Adjustable between 75-deg and 105-deg.

SPINDLES

Offset Spindles Spindles are available with a 3-deg offset for additional pressure to hold door in the closed position. Normally, this is only necessary for center-pivoted single acting applications. However, they can also be used with other applications to compensate for templating errors. Specify hand of offset spindle when ordering.

Cover Plate Universal cover plate 7410, suitable for left hand/right hand, 3/4" offset, 1-1/2" offset, and center pivoted doors. Material is stainless steel or brass depending on the plated finish specified.

FINISHES

• Optional Plated Finishes
• Brass: 605 (Bright) or 606 (Satin).
• Bronze: 611 (Bright), 612 (Satin), or 613 (Oxidized Satin Oil Rubbed).
• Nickel: 618 (Bright) or 619 (Satin).
• Chrome: 625 (Bright) or 626 (Satin).
• Standard Sprayed Finishes
• Aluminum: 689.
• Bronze: 691 (Dull), 690 (Statuary), or 695 (Dark Duranodic).
• Gold: 696.
• Black: 693.
• Optional DORMA Custom Color or Designer Color Finishes
• Special Order