Victor® SR4J Single Stage Heavy-Duty High Pressure Inert Gas Piston Regulator offers 200 - 3000 psig of delivery that is perfect for pressure vessel and dead-end testing. Regulator with maximum inlet pressure of 5500 psig features a machined brass body with housing cap and has 2 1/2" brass gauges having brass piston with Delrin cap bushing for smooth adjustments. Regulator comes with 680 CGA inlet connection having bronze sintered filter and 1/4" Swagelok outlet connection with 1/4' stainless tube fitting. 6" X 6 1/4" X 6 1/2" Regulator features a cartridge type seat assembly with PCTFE seat and an external adjustable relief valves.