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Parker CPI™/A-LOK® Instrumentation Tube Fittings are designed as leak-free connections for process, power and instrumentation applications. The CPI tube fittings utilize a single ferrule for easy make-up and excellent performance in vibration applications. The “spring loaded” effect of the single ferrule creates a constant tension between the fitting body and fitting nut. The A-LOK two ferrule compression tube fittings are designed to provide reliable leak-free connections for applications that specify a two ferrule system. These single and two ferrule fitting designs are manufactured to the highest quality standards and are available in a broad range of sizes, materials and configurations.

NOTE:
  • Dimensions for reference only, subject to change.
  • Tubing wall thickness and corresponding minimum I.D. flow paths are listed so the system designer can properly match the insert to the tubing.
  • Example: 4 TIZ .125 is used with tubing having a wall thickness of 0.062 and I.D. of 0.125.
  • Allows both CPI and ALOK Tube Fittings to be used with soft plastic tubing.
  • Insert for fractional tube
    Unit of Measure
    1 

    Item #

    Tube O.D.

    Tube I.D.

    Tube Wall

    3 TIZ .125 N/A .19 in N/A .13 in N/A .03 in
    4 TIZ .125 N/A .25 in N/A .13 in N/A .06 in
    4 TIZ .170 N/A .25 in N/A .17 in N/A .04 in
    4 TIZ .188 N/A .25 in N/A .19 in N/A .03 in
    5 TIZ .125 N/A .31 in N/A .13 in N/A .09 in
    5 TIZ .188 N/A .31 in N/A .19 in N/A .06 in
    5 TIZ .250 N/A .31 in N/A .25 in N/A .03 in
    6 TIZ .188 N/A .38 in N/A .19 in N/A .09 in
    6 TIZ .250 N/A .38 in N/A .25 in N/A .06 in
    8 TIZ .250 N/A .50 in N/A .25 in N/A .13 in
    8 TIZ .375 N/A .50 in N/A .38 in N/A .06 in
    10 TIZ .375 N/A .63 in N/A .38 in N/A .13 in
    10 TIZ .500 N/A .63 in N/A .50 in N/A .06 in
    12 TIZ .500 N/A .75 in N/A .50 in N/A .13 in
    12 TIZ .625 N/A .75 in N/A .63 in N/A .06 in
    16 TIZ .750 N/A 1.00 in N/A .75 in N/A .13 in
    16 TIZ .875 N/A 1.00 in N/A .88 in N/A .06 in
    Unit of Measure
    1