The rugged PR Class consists of dual-headed, positive displacement piston pumps that provide high, accurate flows and excellent pressure capability. Standard fluid path materials are Stainless Steel, PEEK and inert Hastelloy available with jacketed heads for temperature-controlled processes. Standard seal is Ultra-high-molecular-weight polyethylene (UHMWPE) with stainless steel energizer. Hastelloy pump seal is UHMWPE with Flouropolymer energizer. The pumps are designed for a wide range of Preparative and Semi-Prep Chromatography, as well as SMBC (simulated moving bed chromatography), and many process and industrial applications. 100 mL/min achieve up to 4,000 psi pressures and 300 mL/min versions achieve up to 1,000 psi pressures. Features include an integrated Prime-Purge Valve, interactive keypad control, and complete PC control and status through RS-232 and Micro USB 2.0 ports. Pumps include fitting to connect to 1/8" or 1/4" flexible or stainless tubing for inlet and outlet.