Zonefirst SPRD-18 Damper 30067439-890 consider the Belimo B219B valve

consider the Belimo B219B valve

Field-tested for compatibility

The Emerson Alco 047602 Filter Drier

or diaphragm fatigue in internally piloted 2-way solenoid valves

and 480V primary inputs

Zonefirst SPRD-18 Damper 30067439-890 consider the Belimo B219B valveThe Zonefirst SPRD 18 is a professional grade 18 inch round barometric bypass damper engineered to maintain critical static pressure relief in multi zone HVAC applications. As zone dampers close, this single blade mechanical component automatically responds to rising pressure, diverting excess airflow to the return plenum or a dump zone to prevent coil icing and blower motor strain. Unlike motorized alternatives, the SPRD 18 utilizes a counter