Durable Cast Iron Construction: High-density material provides excellent wear resistance and heat dissipation in continuous-duty cycles

suitable for most ICP blower wheel hubs

one for clockwise rotation (Open)

This OEM part is calibrated to specific inch water column (WC) settings required for the unit's safety logic

Engineering specifications confirm a counter-clockwise (CCW) rotation and a 1/2-inch bore (shaft size)

Belimo A-22G-A22 Calibration kit 340155-7024 Durable Cast Iron Construction: High-densityThe Belimo A 22G A22 Calibration Kit is an essential field service tool designed for the precise zero and span calibration of room CO2 sensors and duct mounted gas detectors. Engineered for HVAC automation systems, this kit ensures that IAQ (Indoor Air Quality) sensors maintain accuracy within strict tolerances, preventing sensor drift that can lead to inefficient demand controlled ventilation (DCV). The kit facilitates the accurate delivery of