What is the pressure range of the Maxitrol R11110-48 orange spring

875 inches and a straight rod length of 1

Can I use this to replace a 4-blade prop

You will need to pair it with a 3-way compatible PopTop actuator depending on your voltage and end-switch requirements

for stable natural gas combustion

Carrier 48TC003644 Fan Blade 340155-7026 What is the pressure rangeThe Carrier 48TC003644 Fan Blade is a critical genuine OEM HVAC replacement engineered specifically for high capacity Carrier rooftop units and commercial condensers. Featuring a 28 inch diameter and a 5 blade configuration, this component is balanced to precise tolerances to minimize vibration and prevent premature motor bearing failure. When performing preventive maintenance or emergency repairs, utilizing an OEM Carrier fan blade ensures that the