Trane ORF0501 Orifice 321042-401 and a main pressure regulator

and a main pressure regulator into a single

Larger sizes require different replacement part numbers

Key Benefits Precise Modulation: Effectively manages the condensing pressure regulator function by modulating refrigerant flow based on receiver pressure

Compact Side Mount: The side mounted auxiliary contact design preserves space on the mounting rail while providing essential multi-circuit control

What Rooftop Units are compatible with the 317537-701

Trane ORF0501 Orifice 321042-401 and a main pressure regulatorThe Trane ORF0501 is a precision engineered #44 Standard Fire Orifice designed specifically for compatible Trane furnace models and gas heating systems. As a critical combustion component, this brass orifice regulates the essential fuel flow to the burner assembly, ensuring the correct gas to air mixture for stable ignition and consistent thermal output. Measuring approximately 5. 7 inches in length, this OEM replacement part provides the exact