An improved puffer-type, compressed-gas circuit-interrupter is provided having an improved double-flow operation, and improved cooling means for cooling the compressed gas prior to its ejection through the insulating movable nozzle and into the established arc. Additionally, the instant invention comprises the use of flexible movable arcing contact fingers with a surrounding cylindrical guide-valve sleeve to prevent premature leakage of compressed gas through the longitudinal finger slots provided in the movable arcing contact fingers during the opening operation. Such movable cylindrical guide-valve sleeve may be either insulating or metallic, as desired.