power-open/power-closed hvac control boards and provides an internal end switch for system confirmation

the SA21-38R includes the specialized Tetraseal O-ring required to achieve a proper seal on the strainer housing

It is designed for tri-state (floating) or two-position control logic using 24V inputs

Technicians should verify furnace component compatibility by referencing the specific model and serial number to ensure the B1420601 ignitor bracket matches the burner housing configuration for optimal combustion performance

the D23324 provides the robust performance required for two-pipe steam systems

ASCO 8320G1 Valve 323613-751 power-open/power-closed hvac control boards andThe ASCO 8320G1 Valve is a high performance 3 way universal solenoid valve engineered for precision fluid control in demanding industrial environments. Featuring a direct acting design, this ASCO RedHat series component requires no minimum operating pressure, making it an ideal choice for low pressure systems, vacuum applications, and sensitive instrumentation. The rugged brass body and reliable NBR (Nitrile) seals ensure a long service life when