Dorma BTS80-3 Floor Concealed Door Closer Size 3 (Body Only) - KAL DOOR HARDWARE

Compact closer body and cement case 2-3/8" deep suited for thin slab concrete construction. Accommodates doors weighing up to 660 pounds 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. If door hardware or adjacent structures interfere with maximum opening, an auxiliary stop should be installed. BTS80 Technical Details: Closer body is non-handed. Mechanical backcheck at approximately 70. Selectable delayed action between 175 and 75. 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. Selectable multipoint hold open between approximately 75 and 175. Adjustment for start of hold open range or when delayed action releases. Adjustable between 75 and 105ing the cement case. If door hardware or adjacent structures interfere with maximum opening, an auxiliary stop should be installed.