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Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Solvent Vapor Exit Accessory 260
Leak testing
Leak testing
When checking the solvent vapor exit assembly for leaks, first check the
tri-column assembly. If the tri-column assembly is not leaking, check the
valve/fitting assembly (which includes the stainless steel union, tubing, and
fitting on the solenoid).
Potential leak points
• Tri-column assembly
• Quartz column connector
• Quartz Y splitter
• Connection to the inlet
• Valve/fitting assembly
• Solenoid valve
• S/S union
• Inlet fitting on the valve/fitting assembly
Note that there are no replacement parts on the valve/fitting assembly. If the
valve fails or the fitting cannot be tightened, replace the assembly.
Leak testing the tri-column assembly
Tools Required
The following tools (not supplied in the SVE Kit) are required to perform the
leak check procedure of the tri-column assembly.
• 1/16-inch (SS) union (part no. 0100-0124)
• Vespel/graphite ferrules:
• For 250 µm column (part no. 5062-3508)
• For 320 µm column (part no. 5062-3506)
• 1/8-inch Swagelok nut (part no. 5180-4103)
• 1/8-inch solid (no hole) vespel ferrule (part no. 0100-1372) or
1/8-inch Swagelok cap
• Electronic leak detector (optional)
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