It is highly recommended to use a downstream gauge to verify your 50 PSI set point after the rebuild

The York S1-025-43225-000 Expansion Valve is a precision-engineered 4 Ton TXV designed specifically for R410A refrigerant systems

as a Class 2 power source

you would typically need a conversion kit or a specific LP-regulated operator to ensure safe combustion pressures

Danfoss 034L0143 Gas Regulator Els PW 17895 It is highly recommended toThe Danfoss 034L0143 (KVC 12) is a professional grade hot gas bypass regulator engineered to maintain stable evaporator pressure by modulating compressor capacity. This 1 2" ODF solder connection valve is essential for systems where low load conditions could lead to coil frosting or short cycling. With a regulation range of 3 to 87 psig and a factory setting of 29 psig, the KVC 12 provides precise control across high and low temperature applications.