EWC Controls PRD Regulating Damper

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EWC Controls PRD 12" Pressure Regulating Damper Made in USA. Model PRD-RD pressure regulating damper is a single blade, round variation of a barometric relief damper. This is the s implest, most economical way of bypassing excess static pressure in multi-zone applications. Resistance is controlled by offsetting the arm and adjusting the weights. The arm can be inserted into either side of the damper for added versatility. Show more