The brookfield NB-4100 Sliding Door Operator has been designed, tested (over 500,000 cycles) and is manufactured by brookfield industries, inc. in accordance with UL 325. The NB4100-1 will operate any industrial sliding door system that requires horizontal operating forces up to 300 lbs, variable speeds up to 13 inches/sec and move doors across practically any opening specified.

The NB-4100 mounts at the header of the door and disconnects for manual operation with a spring-loaded pull down pin. The operator features lightweight aluminum construction, which makes for easier installation and greater corrosion resistance. The steel reinforced, polyurethane timing belt and the linear guide tracking system are maintenance free and need no lubrication.

The NB-4100 can also be modified to operate a bi-parting door. Door activation is via a maintained contact, (3) position-keyed switch, spring returned to stop from both the open and close directions, which is attached to the outside of the NEMA 1 enclosure. Located on the inside the NEMA 1 control panel is the following: Terminal Strip hookups for 110 VAC Field Wiring and Class (2) 24 VDC components, Motor Control, Line Filter, Surge Protection and Circuit Breakers. The NB-4100 door operator is patented under US Patent No. 6,177,771 B1.

We are Authorized to Mark the NB-4100-PLC with the ETL, CE and CSA markings from Intertek Testing Services to assure compliance with UL 325, FCC Part 15 (Emissions) and the following International Standards: EN 60335-1 and - 2 (Safety), EN 61000-6-2 (Immunity) and EN 61000-6-4 (Emissions). The "listing" reports specifically refer to the heavy commercial/industrial doors associated with linear accelerator rooms.

Reference Specifications Document for additional information and Ratings Notes.

Unit of Measure

Continuous Operating Force (max.)

N/A 200 lbs.

Door Wt 1

N/A 6000 lbs.

Max Operating Force 2

N/A 300 lbs.

Travel (max. in one direction)

N/A Unlimited in.

Rated Linear Speed (max.)

N/A 13 in./sec.


N/A Both

Mounting Style

N/A Front

Drive Train

N/A Timing Belt

Minimum Rated Cycles (openings and closings)

N/A 100,000