Overview Of The Hydraulic Path - Agilent Technologies 1260 Infinity II User Manual

Overview of the Hydraulic Path

The solvent from the bottle in the solvent cabinet enters the pump through an
active inlet valve. Each side of the binary pump comprises two substantially
identical pump units. Both pump units comprise a ball-screw drive and a
pump head with two sapphire pistons for reciprocating movement.
Figure 5
A servo-controlled variable reluctance motor drives the two ball-screw drives
in opposite directions. The gears for the ball-screw drives have different
circumferences (ratio 2:1) allowing the first piston to move at double the speed
of the second piston. The solvent enters the pump heads close to the bottom
limit and leaves it at its top. The outer diameter of the piston is smaller than
InfinityLab LC Series 1260 Infinity II Binary Pump User Manual
Pump head
Introduction

Overview of the Hydraulic Path

1
15