Plastic valves for applications involving ozone, bleach, oxygen or air. Heat stable components for underhood applications.  These miniature check vlalves have a maximum pressure of 50 PSI. One way valves are available with Viton, or fluorosilicon disks. Barbs on the valves are used with 1/8, 3/16 (5MM), 1/4, 5/16 (8MM) or 3/8 ID tubing.  Current use includes oxygen concentrators, vacuum systems, anaylsis equipment, automotive control systems.