Pressure Flow Envelope; Pressure Transducer Overview; Flow Path Through The Solvent Management System - Waters ACQUITY UPLC Overview And Maintenance Manual

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
Units displayed
Sign of displayed unit
Theoretical maximum vacuum
Operating range
Typical value

1.5 Flow path through the solvent management system

The following image depicts the flow of solvent through the solvent manager.
Absolute pressure transducer
kPa, bar, psia
Positive
0.0 psia
0.00 to 1.54 psia
0.70 to 1.20 psia
August 8, 2016, 715005050 Rev. C
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