NRD61V – horizontal mounted vertical flow back draft damper

For projects involving reverse-airflow prevention, NRD61V – horizontal mounted vertical flow back draft damper offers a defined product option within the overflow units range. Final duties and accessories should be checked before ordering.

Application and product scope

The horizontal mounted vertical flow back draft damper is listed under Overflow units. It can be evaluated where its documented configuration matches the system layout, operating conditions and room or duct interface.

Supported product details

• Circular configuration for compatible round-duct or terminal layouts.
• Galvanised steel construction is referenced in the source documentation.
• Aluminium is referenced among the product construction details.
• Source documentation references EN1752; confirm the applicable classification and test scope before specification.

Selection and coordination

Selection should account for airflow duty, pressure conditions, system geometry and the available installation space. Check access needs, control interfaces and compatible accessories before the product schedule is released.

Technical documentation

Before approval, compare the product schedule with the current datasheet and drawings. Keep the exact model reference, selected size, finish and accessories together in the submittal package.