Piston Operated Pressure Regulating Valve The JRPH & JRPL Series are piston operated, balanced trim pressure regulators with high Cvs and KEL-F soft seat for ANSI Class VI shutoff. There are three set ranges for each model. Elastomer seals are used throughout with Buna-N, EPDM and Viton being standard options, along with matching back up seals. USDA and FDA approved soft goods available upon request. A variety of gases, water acids and oil applications Fuel cells