Compressed gas treatment system (1; 301; 401; 501; 601; 701; 801; 901) for compressed-gas operated coating installations, comprising - a compressed gas source (23; 923), - a supply station (21; 321; 921) which is supplied with compressed gas (4; 104; 204) from the compressed gas source (23; 923), - at least one spray head (14; 314; 346; 414; 514; 614; 714; 814; 914), - at least one high-voltage device, in particular an ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913), - wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) has a discharge chamber (27, 28; 427, 428; 727, 728; 827, 828), a high-voltage discharge device (17, 18; 107, 108; 207) and a high-voltage generator (39, 40; 439, 440; 639, 640; 739, 740; 839, 840), - wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) is arranged outside the supply station (21; 321; 921), and wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) is connected downstream of the supply station (21; 321; 921) in the flow of the compressed gas (4; 104; 204), characterized in that - in order to use the compressed gas treatment system (1; 301; 401; 501; 601; 701; 801; 901) in an explosion-protected painting space (Rb) of the coating installation, the discharge chamber (27, 28; 427, 428; 727, 728; 827, 828) and the high-voltage discharge device (17, 18; 107, 108; 207) of the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) are arranged inside the explosion-protected painting space (Rb). - a compressed gas source (23; 923), - a supply station (21; 321; 921) which is supplied with compressed gas (4; 104; 204) from the compressed gas source (23; 923), - at least one spray head (14; 314; 346; 414; 514; 614; 714; 814; 914), - at least one high-voltage device, in particular an ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913), - wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) has a discharge chamber (27, 28; 427, 428; 727, 728; 827, 828), a high-voltage discharge device (17, 18; 107, 108; 207) and a high-voltage generator (39, 40; 439, 440; 639, 640; 739, 740; 839, 840), - wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) is arranged outside the supply station (21; 321; 921), and wherein the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) is connected downstream of the supply station (21; 321; 921) in the flow of the compressed gas (4; 104; 204), - in order to use the compressed gas treatment system (1; 301; 401; 501; 601; 701; 801; 901) in an explosion-protected painting space (Rb) of the coating installation, the discharge chamber (27, 28; 427, 428; 727, 728; 827, 828) and the high-voltage discharge device (17, 18; 107, 108; 207) of the high-voltage device, in particular ionizing device (12, 13; 101; 201; 312; 313; 412; 413; 612; 613; 712; 713; 812; 813; 913) are arranged inside the explosion-protected painting space (Rb).