GLT™ (Glass Lined Tubing)
GLT™ exhibits excellent resistance to the harshest of conditions. Maximum temperature for continuous use of GLT is 500°C.
Description: Borosilicate Glass Lined Stainless Steel Tubing
Sample Compatibility: Excellent resistance to strong acids and bases
Applications: Ideal for HPLC columns, especially biological matrices; GC/MS interfaces; FTIR transfer lines; inlet liners; thermal desorption tubes; tee pieces and unions; SFC
Temperature: GLT™ will withstand continuous use at temperatures up to 500°C and can be electrically heated by applying a low voltage across the metal casing.
Cutting: The GLT™ may be cut using a wet silicon-carbide cut-off wheel, the ends ground square, then the tubing washed and dried. The ends of the glass liner can be flame polished by heating to a medium red.
Connections: The use of graphite ferrules is recommended for connecting GLT™. Swagelok® metal ferrules may only be used with 2 and 3mm ID 1/4" OD, and 1.5mm ID and under 1/8" OD GLT™. Use of Swagelok® ferrules with larger ID GLT™ may result in cracking of the glass liner.
Bending: GLT™ 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 (approximately 800°C) it can be slowly bent to the desired angle while still in the flame. It is important that the tubing is not bent in the cold condition.
Silver-Soldering: After first removing the black oxide layer, the metal sheath can be silver-soldered by conventional methods. It is important 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 temperature. Take care not to allow hot flux to come into contact with the glass liner.