Spec Sheet
Submittal Sheet
Installation Instructions
• Gasketing included for high integrity seal
• Single Set Screw secures motor
• Available from 4’’ to 20’’ diameter.
• DuroZone “Mid-Torque” Spring Return Motor
• Reversible Motor – Spring Open or Spring Closed
Spring Open:
#37340 NSPRD024-4 4in Spring Return Round Damper Mid-Torque
#37341 NSPRD024-5 5in Spring Return Round Damper Mid-Torque
#37342 NSPRD024-6 6in Spring Return Round Damper Mid-Torque
#37343 NSPRD024-7 7in Spring Return Round Damper Mid-Torque
#37344 NSPRD024-8 8in Spring Return Round Damper Mid-Torque
#37345 NSPRD024-9 9in Spring Return Round Damper Mid-Torque
#37346 NSPRD024-10 10in Spring Return Round Damper Mid-Torque
#37347 NSPRD024-11 11in Spring Return Round Damper Mid-Torque
#37348 NSPRD024-12 12in Spring Return Round Damper Mid-Torque
#37349 NSPRD024-14 14in Spring Return Round Damper Mid-Torque
#37350 NSPRD024-16 16in Spring Return Round Damper Mid-Torque
#37351 NSPRD024-18 18in Spring Return Round Damper Mid-Torque
#37352 NSPRD024-20 20in Spring Return Round Damper Mid-Torque
Spring Closed:
#37330 NSPRD024-4NC 4in Spring Return Round Damper Mid-Torque
#37331 NSPRD024-5NC 5in Spring Return Round Damper Mid-Torque
#37021 NSPRD024-6NC 6in Spring Return Round Damper Mid-Torque
#37022 NSPRD024-7NC 7in Spring Return Round Damper Mid-Torque
#37023 NSPRD024-8NC 8in Spring Return Round Damper Mid-Torque
#37037 NSPRD024-10NC 10in Spring Return Round Damper Mid-Torque
#37056 NSPRD024-12NC 12in Spring Return Round Damper Mid-Torque
#37334 NSPRD024-14NC 14in Spring Return Round Damper Mid-Torque
#37335 NSPRD024-16NC 16in Spring Return Round Damper Mid-Torque
