What is the difference between the AF09 and the older A9 series

restoring the system's thermal exchange efficiency and operational decibel levels to original factory standards

Specifically designed as a manual reset limit switch

Delivering 140 lb-in torque

If your unit utilizes the older 031-series boards listed above

ASCO SC8238T405-24VDC Valve 320735-701 What is the difference betweenThe ASCO SC8238T405 24VDC is a high performance 2 way normally closed solenoid valve designed for precision fluid control in demanding industrial and HVACR environments. As a premiere 1 2 inch NPT solenoid valve, this direct acting component provides immediate response times without requiring a minimum operating pressure. Engineered by ASCO Power Technologies, it features a robust brass body and FKM elastomers, making it an ideal 24VDC solenoid valve