Fused silica unions

The patented design of our fused silica fittings insures stable, leak-free connections at temperatures up to 400°C, and undistorted ferrules that are easily removed and reused. Columns may be changed without the risk of the leaks which can devastate systems such as mass spectrometers or atomic emission detectors. This is accomplished with a spring-loaded self-compensating nut which provides a constant sealing force as the temperature varies.

The fused silica union has a quartz liner, providing an inert connection zone of minimal volume. Since the seal occurs only at the ferrule tip, the total sealing force is minimized, leaving the ferrule undistorted and reusable.
Note: The ferrules used in this union are unique, due to the seal at the tip. Standard ferrules will not work in this union. Replacement ferrules are available below.

Drawing

Further reference