The PN1150 Quaternary Pump (Low Pressure Gradient pump) is a bio-inert HPLC/FPLC solvent delivery system to convey liquids for analytical and semipreparative applications. The module is intended to be used in the following areas:

Biochemistry analysis

Chemical analysis

Food analysis

Pharmaceutical analysis

Environmental analysis

Liquids are conveyed either with constant flow or with constant pressure. In FFF systems only “Constant Flow” mode is used. All functions of the pump are controlled via the NovaFFF control software.

The PN1150 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. The nearly pulsation-free solvent delivery of the PN1150 results from the high stroke frequency/low stroke volume and the use of a compensation piston. While the delivery piston discharges the solvent volume, the compensation piston, located on the pressure side, collects half of the volume. During the return movement of the delivery piston, the collected volume is discharged from the compensation piston. The microprocessor-controlled speed regulation results in a highly stable speed of the drive motor. In contrast to standard regulators, the microprocessor is able to compensate continuously the compressibility of the eluents through a computerized program. This results in a constant volume delivery throughout the entire delivery range.