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DUROZONE SPRING-RETURN DAMPERS

The new DuroZone round spring return dampers NSPRD024 and SPRD110 series, can be configured for either spring OPEN or spring CLOSED operation. For example: Spring-Return OPEN means that when the power is off, the damper OPENS.
DuroZone "Mid-Torque" spring-return round dampers come in sizes from 4 to 20 inches in diameter with a 24 volt motor.

NSPRD Series Features:
Gasketing included for high integrity seal
Single set screw secures motor
DuroZone "Mid-Torque" Spring Return Motor

Note: The DuroZone round spring return dampers with the new Mid-Torque motors are designed for fresh air intake.  Although we recommend the RD, PMB and MMB series for zoning, the NSPRD024 with a Mid-Torque motor configured spring OPEN can be used for zoning.

DuroZone Round Spring-Return Dampers with 24 volt Mid-Torque Motor

All NSPRD024 dampers are shipped in the spring OPEN, (normally open) position.
If the power is off: DAMPER OPENS.

Item # Code: Description
37340 NSPRD024-4 4 inch diameter spring return round damper
37341 NSPRD024-5 5 inch diameter spring return round damper
37342 NSPRD024-6 6 inch diameter spring return round damper
37343 NSPRD024-7 7 inch diameter spring return round damper
37344 NSPRD024-8 8 inch diameter spring return round damper
37345 NSPRD024-9 9inch diameter spring return round damper
37346 NSPRD024-10 10 inch diameter spring return round damper
37347 NSPRD024-11 11 inch diameter spring return round damper
37348 NSPRD024-12 12 inch diameter spring return round damper
37349 NSPRD024-14 14 inch diameter spring return round damper
37350 NSPRD024-16 16 inch diameter spring return round damper
37351 NSPRD024-18 18 inch diameter spring return round damper
37352 NSPRD024-20 20 inch diameter spring return round damper
35105 NSPRD-RM Replacement Motor for NSPRD024 Series


- The DuroZone round spring return and multi-size spring return dampers with a standard motor are fresh air dampers.  They are not built for zoning.

DuroZone Round Spring Return Dampers with a Standard 110 Volt Motor
Item # Code: Description
37076 SPRD110-5 5 inch diameter spring return round damper
37077 SPRD110-6 6 inch diameter spring return round damper
37079 SPRD110-8 8 inch diameter spring return round damper
37081 SPRD110-10 10 inch diameter spring return round damper
37083 SPRD110-12 12 inch diameter spring return round damper
35142 RMSR110 SPRD110 Replacement Motor for SPRD110 Series

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