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GC ACCESSORIES | INSTRUMENT SUPPLIES
Connectors
NOTE: This product is not recommended for
GC column-to-MS connections.
Vu2 Union® Connectors
• Connect a guard column to an
analytical column.
• Connect a column to a transfer line.
• Connect two columns in series.
• Repair a broken column.
• Fit both Restek® cage designs.
Restek’s Vu2 Union® connector combines the
simplicity of a Press-Tight® union with the
strength of a metal union.
How does a Vu2 Union® connector work?
A Press-Tight® union in the Vu2 Union® connector joins the fused silica tubing ends
together; the ferrule and knurled nut at each end of the connector hold the tubing
in place via a secondary seal between the ferrule and the Press-Tight® union. Each
knurled nut applies independent pressure to each ferrule to make leak-tight seals with
the column ends. These ultra-strong connections will not unexpectedly disconnect
under temperature changes, vibrations, or other stresses normally encountered in GC
analyses. The open design allows visual confirmation of the seal between the column
and the Press-Tight® union to ensure confidence in the connection. Hang the connec-
tor from the column cage to minimize stress on the connections.
Who will benefit from using Vu2 Union® connectors?
Any analyst using guard columns, transfer lines, or restrictor tubing; performing a
dual-column analysis with columns connected in series; or seeking to repair a broken
column will find Vu2 Union® connectors the simple, reliable, easy-to-use solution to
their connection needs.
Kits include: Vu2 Union® body, two knurled nuts, two Press-Tight® unions, and four ferrules
Secure, reliable
column-to-column
connections!
Description Ferrules Fit Column ID qty. cat.# price
Vu2 Union Connector Kit 0.10–0.15 mm kit 22220
Vu2 Union Connector Kit 0.18–0.28 mm kit 21105
Vu2 Union Connector Kit 0.32 mm kit 21106
Vu2 Union Connector Kit 0.45–0.53 mm kit 21107
Knurled Nut 2-pk. 21108
Universal Press-Tight® Connectors
Graphite Ferrules for Vu2 Union® Connectors
• High-purity, high-density graphite.
• Stable to 450 °C.
• No binders that can off-gas or adsorb analytes.
• Smooth surface and clean edges.
A guard column connected to an analytical
column by a Vu2 Union® connector.
The Vu2 Union® connector’ s open
design allows visual confirmation
of the seal; secondary seals
ensure leak-tight connections.
injector detector
guard
column
analytical
column
Vu2 Union®
connector
body
hanger
Press-Tight® connector ferrule knurled nut
fused silica
column, guard
column, or
transfer line
Fit both Restek® cage designs.
20400
20480
Description 5-pk. 25-pk. 100-pk.
Universal Press-Tight Connectors 20400 20401 20402
Universal Press-Tight Connectors, Deactivated 20429 20430 —
Universal Press-Tight Connectors, Siltek Deactivated 20480 20449 —
Ferrule ID Fits Column ID Graphite 2-pk. Graphite 10-pk.
0.3 mm 0.10–0.15 mm 22221 22222
0.4 mm 0.18–0.28 mm 20280 20281
0.5 mm 0.32 mm 20282 20283
0.8 mm 0.45–0.53 mm 20284 20285