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Built with a rugged cast iron body (ASTM A48 Class 30) and an integral strainer
leaking fluid
ensuring no modification is required
Why is my fan blade vibrating after installation
ZoneFirst RDP-10 Damper 319852-301 Built with a rugged castThe ZoneFirst RDP 10 is a heavy duty 10 inch round damper designed for professional grade HVAC zone control systems. Engineered for forced air zoning applications, this unit utilizes a 12VDC motor (model MP12M) that provides power open power closed functionality. Unlike spring return models, this actuator driven design ensures the blade stays in position without continuous power draw once the cycle is complete, improving long term reliability in