SyriXus Series Pumps Installation and Operation Guide
Section 4 Gradient Pumping for Pressure, Flow, and Concentration Modes
4-3
EAR99 Technology Subject to Restrictions Contained on the Cover Page
A gradient pumping system includes high-pressure, two-way valves
that connect the pump inlets to fluid reservoirs, and the pump outlets
to the gradient mixer (dual-pump system) or other apparatus
(single-pump system). Each refill kit and outlet valve package con-
tains one two-way valve shown in Figure 4-1. The user will need to
provide the necessary hardware for the application.
Figure 4-1
Two-way valve
Following installation, the tubing connections must be tested for leaks
before any program is run. If a leak is found, tighten the connection
slightly. If the leak persists, swage the connection again with a new
ferrule. For leak test procedures. refer to Technical Bulletin
Field Verification Procedures.
4.2.1 Inlet Connections
Valve components and connections are shown in Figure 4-2.
1. Mount the inlet valve on the pump housing with the spacer block
and screws provided.
2. Connect the pre-bent SST tubing from one port of the valve to
the pump inlet. Use the nut and ferrule to connect the tubing at
the inlet and the valve fittings to connect the tubing at the valve.
3. Connect the PTFE refill tubing (with the filter) to the other port
of the valve, using the nuts and ferrules supplied.
NOTE
When connecting to pressurized sources in supercritical fluid appli-
cations, use the stainless steel tubing without a filter. An inline filter
is contained in the CO
2
connection package (refer to Technical Bul-
TB08 CO2 Applications and Technical Notes.
Two-Way Valve
