Leak Testing; Potential Leak Points; Leak Testing The Tri-Column Assembly - Agilent Technologies 6890 Series Service Manual

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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).

Tri-column assembly

Quartz column connector

Quartz Y splitter

Connection to the inlet

Valve/fitting assembly

Solenoid valve

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.

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:

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)

For 250 µm column (part no. 5062-3508)

For 320 µm column (part no. 5062-3506)

Agilent 6890 Gas Chromatograph Service Manual

Solvent Vapor Exit Accessory

Leak testing

6890a 6890 plus