Liberty Max Duty Grade 1 Extreme Heavy Duty Cast Steel Door Closer For Abusive / High Traffic and Heavy Wind Door Applications

Liberty Max Duty Door Closer Features

• The Liberty Max Duty Door Closer complies with ANSI A156.4, Grade 1, 2 million cycles, UL/ULC listed up to3 hours fire rated.
• The Liberty Max Duty Door Closer is cast steel.
• The Liberty Max Duty Door Closer is non-handed.
• The Liberty Max Duty Door Closer is tri-packed for regular, top jamb and parallel arm installations.
• The Liberty Max Duty Door Closer spring size is adjustable 1 - 6.
• The Liberty Max Duty Door Closer features backcheck: Adjustable, hydraulic - providing cushioning and preventing uncontrolledopenings of the door.
• The Liberty Max Duty Door Closer valves are adjustable, independent, non-critical (sweep and latch), consistentclosing speeds.

Liberty Max Duty Door Closer Size Options

The door closer contains a fully adjustable spring allowing the door closer to be installed on any commercial door.

• Size 1 To 6: For Interior Doors 32" To 60" Wide or Exterior Doors 28" To 54" Wide

Liberty Max Duty Door Closer Arm Type Options

• The Liberty Max Duty Door Closer Is Tri-Packed, meaning it can be installed Regular, Top Jamb, or Parallel Arm

Liberty Max Duty Door Closer Drop Plate Option

A flat drop plate option is available for installations where there is low headroom or insufficient mounting space on the door frame.

Liberty Max Duty Door Closer Regular Arm Installation With Drop Plate

Liberty Max Duty Door Closer Top Jamb Installation With Drop Plate

Liberty Max Duty Door Closer Parallel Arm Installation With Drop Plate

Liberty Max DutyDoor Closer Additional Mounting Hardware

• Sex Nuts and Bolts: Set of 4 Each. For steel door applications.

Liberty Max Duty Door Closer Comes Standard With Backcheck

The adjustable back check provides a checking or cushioning effect as the door is severely thrust open, typically as it might be caught by the wind, or in violent egress by an individual. The back check helps prevent damage to the door, door hardware, or to adjacent wall surfaces. The strength of the checking action is adjustable, and when it is fully employed (not recommended) it places considerable strain on the door closer, which can result in failing or leaking. It is always best to turn out back the back check valve 1-1/2 to 2 full turns from the fully closed position for safety

Liberty Max Duty Door Closer Hold Open Function

This option allows you to add a hold open arm to the door closer. A hold open arm is an adjustable arm that allows the user to set the door to a hold open position.

Liberty Max Duty Door Closer Adjustment

Liberty Max DutyDoor Closer Closing Cycle

Note: Closing arcs (Close and Latch) are controlled by two (2) separate speed valve adjuster. Adjust the closing speed first, then adjust the latching speed.

1. Closing speed adjustment is accomplished by full rotations of the speed valve adjuster. - Turn the speed valve screw clockwise for a slower close arc closing speed. - Turn the speed valve screw counter-clockwise for a faster close arc closing speed.

2. Latch speed adjustment is accomplished by full rotations of the speed adjuster valve. - Turn the speed valve screw clockwise for a slower latch arc closing speed. - Turn the speed valve screw counter-clockwise for a faster latch arc closing speed.

CAUTION!!! Do not turn speed adjuster valve more than two (2) full turns counter-clockwise from its factory default position, as the two speed valve adjusters could become dislodge from the door closer body, resulting in the loss of internal fluid and failure of the device.