1.3 Pressure flow envelope
The QSM, a single pump with a proportioning valve, has a maximum operating pressure of
103,421 kPa (1034 bar, 15,000 psi) at flow rates to 1 mL/min. The maximum operating pressure
decreases linearly to 53,779 kPa (538 bar, 7800 psi) at flow rates up to 2.2 mL/min.
1.4 Pressure transducer overview
The absolute pressure transducer (APT), which measures the pressure on the low pressure side
of the degasser system, is unaffected by altitude or barometric changes.
Table 1–1: Absolute pressure transducer attributes
Item
Absolute pressure transducer
Units displayed
kPa, bar, psia
Sign of displayed unit
Positive
Theoretical maximum vacuum
0.0 psia
Operating range
0.00 to 1.54 psia
Typical value
0.70 to 1.20 psia
1.5 Flow path through the solvent management system
The following image depicts the flow of solvent through the solvent manager.
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