300 Series Adjustable Spring Power Overhead Concealed Door Closer by International Door Closer
Suitable for both Center Hung (Double or Single Acting) and Offset Doors. All Weather Fluid Two Adjustment Valves: Closing and Latching speeds controlled by separate regulating valves, adjustable after installation. Adjustable S type side loading, or A type, K type and PT type end loading top arms are available for center pivoted applications. Offset JO and VO type top arms are available for butt hinge or offset pivot (may not meet handicap force requirements). Adjustable (3010-DP) dual purpose radial ball bearing bottom pivot set is standard for floor or threshold center pivoted installation. 3010-GE and 3010-G bottom pivot sets are available, but must be ordered separately. Fits in an aluminum header or transom bar as small as 1 3/4 x 4 . Stable hydraulic door check fluid for any climatic operation and constant lubrication.