Postnova model 1150 quaternary pump

Eluent delivery system for FFF and SEC

The model 1150 quaternary pump (Low Pressure Gradient pump) is a bio-inert solvent delivery system for SEC and FFF. It allows online preparation of aqueous and organic solvents and solvent mixtures with high precision and reproducibility.
Liquids are conveyed either with constant flow or with constant pressure. In FFF and SEC systems only “Constant Flow” mode is used. All functions of the pump are controlled via the NovaFFF control software.

The model 1150 quaternary pump is a 1/0.5 stroke double piston pump with a low pressure gradient mixing valve block which is able to generate a gradient mix of solvents from up to four different fluid reservoirs. It works with short piston stroke technology and only two check valves. This results in the low pulsation of a dual piston pump combined with the reliability of a single piston pump. The compensation piston works with a half of the stroke length of the delivery piston.