High-pressure pump with a constant flow rate and high-pressure liquid transfer process with a constant flow rate

摘要

With the proposed high-pressure pump with a constant flow rate can be reliably a solvent of a a liquid transfer system as described on the low-pressure side, are to be transmitted, even if, during mixing of solvents by means of a high-pressure-gradient-liquid transfer the difference in the mixing ratio is large.For this purpose, at a second pressure sensor (114) and the detected pressure value at a fourth pressure sensor (115) sensed pressure value is compared with one another. If the on the second pressure sensor (114) sensed pressure value (p_A1) is equal to or greater than the at the fourth pressure sensor (115) sensed pressure value (p_A2), there is a second check valve (117) in the open state, and the operation is finished. When the detected pressure value (p_A1) is smaller than the detected pressure value (p_A2), it is determined whether a leak is present. If no leak is present, there is the type of solvent is determined. It is a as the compression path for a second piston (116), which, for each solvent is determined and stored in a memory, and was added to the first piston (103) is driven correspondingly.