This is the power supply assembly only

and acid to prevent system contamination issues

Circular charts like the 12-inch DR4500 series require different media

and SV9501 series

Trane VAL9030 Gas Valve Els PW 17895 This is the power supplyThe Trane VAL9030 Gas Valve is a technical grade 1 2" 24V 2 stage gas valve engineered specifically for high efficiency Trane J Series furnaces and light commercial heating equipment. Designed as a direct Trane replacement valve, the VAL9030 manages low fire and high fire manifold pressures to maintain precise thermal equilibrium and reduce short cycling. This HVAC gas control valve features a compact 1 2 inch NPT inlet and outlet configuration,