Vibration Dampening: Integrated isolator assembly reduces mechanical noise

a buzzing or failing motor typically requires an F19-0097 (3-wire) or F19-0104 (2-wire) motor replacement

Precise Pressure Management: Calibrated for 2

Universal Compatibility: Fits a wide range of ASCO RedHat and RedHat II valve series used in steam

the 1830-312 is factory-shipped with a natural gas orifice installed but includes a separate conversion orifice for liquid propane (LP) applications

Zonefirst AOBD-20X12 Damper Els PW 29614 Vibration Dampening: Integrated isolator assemblyThe Zonefirst AOBD 20X12 is a professional grade automatic opposed blade damper designed for precision airflow control in commercial and residential HVAC systems. Measuring 20" wide by 12" high, this rigid extruded aluminum damper utilizes an opposed blade configuration to minimize turbulence and provide a linear flow characteristic essential for balanced zoning system applications. The unit is equipped with a high torque 24Vac power open power closed