Kepner Products Co. Kepner Products Company manufacturer innovative zero leakage control valves for liquid and gas. They feature a flexible seat design that offers positive leakage control of liquid or gas. Available in check, relief, shuttle and pilot operated check valves. These valves are offered with a wide choice of end configurations and materials. Full range of sizes from micro-mini to 500 GPM. Pressure ratings to 6,000 PSI. Related LinksWebsite