Vortex Tubes take an ordinary supply of compressed air and convert it into two separate streams; one cold and one hot. Applications include cooling cutting tools, hot melts, electronic controls, soldered parts, and gas samples. Did you know? Supreme Air Products Corp. Vortex Tubes use a generator and valve made of brass and sealed with viton o-rings to allow their use in the widest range of environments. Others use plastic generators and standard Buna N O-Rings and charge extra for brass and viton!