A gas turbine engine 110 is provided comprising a compressor 112 with an insulated cooling circuit 310. The compressor 112 comprises a compressor casing 118 having a compression chamber 119 and at least one stator 128 and at least one rotor 126 disposed in the compression chamber 119, the at least one stator 128 comprising a stator body 210 having a plurality of tubes 320 for transporting cooling air 322 through passages 312 in the stator body 210 into the compression chamber 119. The plurality of tubes 320 are surrounded by an air gap 328 for insulating the tubes from the stator body 210.
