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229
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