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About FittingsNo matter how expensive or sophisticated an analytical system’s valves, columns, detectors, or integrators might be, if the fittings do not make leak-tight seals, the system will not perform properly. The fittings must also be inert relative to the sample components, provide a flow path which does not induce any turbulence or mixing, and add as little volume as possible to the system. Fitting designs which best address the aspect of added volume allow the tube ends to butt directly to each other or have bores which match the tubing bore, leaving no dead or unswept volume. Such fittings are called zero dead volume fittings. Our Valco and Cheminert fitting lines excel in all critical areas of the designing and manufacturing of fittings. Quality considerations, which cannot be ignored if an analytical system is to reach and maintain optimum performance levels, include interchangeability, counterbore tolerances, ID/OD concentricity, mixing potential, cleaning procedures, and the method employed to make up the ferrule on the tube. The most common types of fittings • Compression fittings • Flanged fittings • Flangeless fittings Why we think our zero dead volume compression fittings are the best • No tubing deformation • Interchangeability • Reliably clean • Precision machining, finishing, and tolerances • Comparison of fitting designs  CAUTION
The analytical devices market has attracted numerous companies which copy Valco/Cheminert designs. Please exercise caution in the use of copies, which may not be compatible our original versions. Because of VICI’s high volume production and dedicated machinery, you will find that our fittings are less expensive and of consistently higher quality than competing copies.
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