D41
GLT Tubing
Scientific Instrument Services, Inc.
TM
FAX: 908-806-6631
www.sisweb.com/catalog/08/D41
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Chemical Inertness of Glass - Strength of Steel
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Ideal for Chromatography and Critical Flow Applications
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Available in 1/16" to 1/8" OD and 0.3mm to 4.0mm ID
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Suitable for high and low temperatures and pressures
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Simply bent and fabricated into complex flow systems
1/16" OD GLTTM
Diameter (mm)
0.3
0.4
0.5
0.7
0.8
Length (cm)
Part No.
Part No.
Part No.
Part No.
Part No.
30
60
- -
90
- -
180
- -
1/8" OD GLTTM
Diameter (mm)
0.50
0.75
1.0
1.5
1.8
Length (cm)
Part No.
Part No.
Part No.
Part No.
30
60
- -
90
- -
- -
180
- -
1/4" OD GLTTM
Diameter (mm)
2.0
4.0
Length (cm)
Part No.
Part No.
30
-
-
60
-
-
90
-
-
180
-
-
G
LT is an ideal tubing for use in
instrumentation and process
applications where corrosion
resistance, inertness, smoothness and the
ability to operate over wide temperature
ranges is required for transporting gases
and liquids.
Tubing sizes
The tubing is available in a range of
internal and external sizes from 1/16" to
1/8" OD and 0.3 mm ID to 1.8 mm ID.
Applications
GLTTM's applications include LC, GC
and SFC columns, GC, LC and SFC flow
lines, Capillary Injector and Detector
fittings, Critical Process flow lines,
Applications involving Corrosive Solvents,
Process
Instruments,
Laboratory
Equipment, Manifolds, Fittings and
Adapters, Connectors, Inert Probes.
Special applications hardware
SIS is able to produce special
hardware, in GLTTM or stainless steel to
customer specifications. Requests for
non-standard components should be
accompanied by an accurate engineering
drawing indicating tolerances on all
dimensions.
GLTTM user fabrication methods
Temperature:
GLTTM will withstand
continuous use at temperatures up to
600°C and if desired can be electrically
heated by applying a low voltage across
the metal casing.
Bending:
GLTTM can be bent without
damage to the glass lining by heating it
with a gas-air burner in the region where
the bend is required. When the metal
tubing turns medium red (approx. 800°C) it
can slowly be bent to the desired angle
while still in the flame. It is possible for the
1/16" and 1/8" O.D. GLTTM to be coiled. It
is important that the tubing is not bent
while it is cold.
Cutting:
The GLTTM may be cut using a
wet silicon-carbide cut-off wheel. The ends
should then be ground square and the
tubing washed and dried. The ends of the
glass liner can be flame polished by
heating to a medium red.
Silver Soldering:
After first removing the
black oxide layer the metal sheath can be
silver soldered to other components by
conventional methods. lt is important
however that excessive heat is not applied
to the tubing. On completion of soldering,
the components should not be quenched,
but allowed to cool slowly to ambient
temperatures.
Connections
:
The use of SGE
GraphlokTM high temperature graphite
ferrules is recommended for connecting
GLTTM directly into unions or alternatively,
PTFE ferrules can be used for low
temperatures. Use low hold-up unions for
1/16" GLTTM.
For very high pressure applications
such as LC we can machine a thread onto
the outer metal casing of 1/8" GLTTM.
Then using suitable fittings and natural
unfilled Vespel ferrules, the tubing can be
used at pressures up to 650 atmospheres
(10,000 psi).
Glass Lined Metal Tubing-GLT
TM
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