The JASCO Model PU-2089 is a compact HPLC Quaternary low pressure gradient pump designed to meet the rigorous requirements of a wide range of research and routine gradient applications. The pulse-free and stable SSQD (Slow suction, Quick delivery) pumping system guarantees the most reliable solvent flow.
Built-in low pressure proportioning valve and degasser enable the highest flexibility in solvent choices of up to four solvents and excellent gradient solvent delivery.
Compact-sized HPLC pump
The size of the pump is a mere 15 cm wide and 22.5 cm high. The PU-2089 and other components can be stacked to comprise a system requiring minimal bench space in the crowded modern laboratory.
Excellent pump performance
JASCO patented the SSQD (Slow suction, Quick delivery) pumping method which ensures the most reliable, accurate and stable solvent delivery possible. A guaranteed flow rate precision within 0.1% assures good reproducibility of gradient proportion and retention time. Pulse-free flow assures maximum detector sensitivity.
Top performance low pressure mixing
Built-in proportioning valve and degasser for low-pressure mixing of up to four solvents provide consistently smooth solvent flow and highest flexibility in solvent choices. The fully integrated design keeps dead volume to a minimum
Extreme durability
Utilizing ceramic plungers and an automatic plunger cleaning system assures a long, maintenance free pump life. Diaphragms located behind the plunger seals provide an 'active' cleaning the plunger surface, thus avoiding the precipitation of salts from buffer solutions.
Full programmability
Stand-alone front panel programming of 10 files with up to 64 steps/file is provided eliminating the need for external computers or system controllers. The Built-in program allows gradient operation without need of a system controller. PC System control is provided by Chrompass
