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Constant flow damper with manual setting of one flow.

VRL1 is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start.

The unit compensates for e.g. connection and disconnectionof system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc.

Ø 80–250 fullfills pressure class A in closed position.