Description Specifications Literature Description Designed for low and high pressures up to 4000 PSIG inlet, the PR-59 Series pressure reducing regulator controls high flow with its Cv flow coefficient of 1.2. Though normally supplied without self-relieving capability, this feature can be added as an option.While primarily designed for use with gas streams, the PR-59 can be used with virtually any liquid systems that are compatible with the seals. A large size piston sensor gives good sensitivity of control even at low outlet pressures and the Kel-F® valve seat assembly gives normal bubble-tight shutoff. Features and Specifications 316L Stainless Steel, Brass and MONEL® body construction Inlet pressure capability up to 4000 PSIG Outlet control ranges from 250 PSIG up to 4000 PSIG Optional self-relieving feature Inlet and outlet ports of ½" or ¾" FNPT with ¼" FNPT gauge ports optional ½" FNPT standard Balanced poppet valve design for constant pressure control Viton® seals (other elastomers optional) PCTFE seat Cv flow coefficient is 1.2 Operating temperatures -40° F to +175° F (-40° C to +80° C) State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Body Material316L Stainless SteelPort ConfigurationBProcess Port Type½" FNPT (¼" FNPT gauge ports)Surface Finish of Diaphragm Cavity< 25 RaSeat MaterialPCTFE (formerly Kel-F 81)Flow Coefficient (Cv)1.2Outlet Range0-1000 PSIGPiston TypeNon-self-relievingPiston MaterialStainless SteelCap AssemblyStandard, Stainless Steel Literature & Docs Accessories