The Pumps comprise one pump head unit with an optional solvent cabinet, a vacuum degasser (optional for the isocratic pump), and a gradient valve (MCGV/4CGV) for quaternary pumps, or an optional solvent selection valve (SSV) for isocratic pumps. The combination of the pump head assembly and high-speed proportioning MCGV/4CGV with a possible connection up to four different solvents in quaternary pumps provides gradient generation by low pressure mixing. The combination of the pump head assembly and SSV in isocratic pump provides opportunity to make a choice between three different solvents. A solvent cabinet provides enough space for eight one-liter bottles. The Active Seal Wash (ASW) and Active Inlet Valve (AIV) options are available for quaternary pumps when concentrated buffer solutions are used. The Bio-inert pump is optimized for these conditions, thus is always equipped with ASW and AIV.
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