Assembly Instructions for Parker EO-3 Metric Flareless Tube Fittings

    Parker EO-3 Fitting System

    Assembly of EO-3 tube fittings is complete when the marking on the indicator rings of the stud and nut align. Indicator rings save the last assembly position on the nut and the marking will indicate proper assembly. If the assembly of EO-3 tube and swivel connections is greater than required, the indicator ring is dragged along on the nut.

    Re-assembly of EO-3 tube and swivel connections are made using the same instructions as initial installation - assembly is correct when the marking on the indicator rings align.

    EO-3 Tube Connection Assembly Instructions

    Image of EO3 Tube Connection Assembly - Step 1 Image of EO3 Tube Connection Assembly - Step 2 Image of EO3 Tube Connection Assembly Check - Correct Image of EO3 Tube Connection Assembly Check - Wrong
    • Tube must fit without tension
    • Screw nut until finger-tight
    • Do not twist indicator rings on the nut or stud prior to assembly
    • Tighten nut with wrench

     Assembly check:

    • Check if indication marks on the indication rings of stud and nut align

     If positioning of the indication ring marks do not align:

    • Further tightening is required until the marks of the indication rings of stud and nut align

    EO-3 Swivel Nut Fittings Assembly Instructions

     If positioning of the indication ring marks do not align:

    • Further tightening is required until the marks of the indication rings of stud and nut align
    Image of EO3 Swivel Nut Connection Assembly - Step 1 Image of EO3 Swivel Nut Connection Assembly - Step 2 Image of EO3 Swivel Nut Assembly Check - Correct Image of EO3 Swivel Nut Assembly Check - Wrong
    • Align EO-3 swivel fitting
    • Screw nut until finger-tight
    • Do not twist indicator rings on the nut or stud prior to assembly
    • Tighten nut with wrench

     Assembly check:

    • Check if indication marks on the indication rings of stud and nut align

     If positioning of the indication ring marks do not align:

    • Further tightening is required until the marks of the indication rings of stud and nut align

    EO-3 Metric Straight Port Connection Assembly Instructions

    Image of EO3 Metric Straight Port Connection Assembly - Step 1 Image of EO3 Metric Straight Port Connection Assembly - Step 2  
    • Screw in until hand tight
    • Tighten according to chart below
    • Metric Thread DIN ISO 6149-2/3
    • Metric Thread ISO 9974-2/3
    • BSPP Thread G DIN EN ISO 1179-2

    Assembly Torques for EO-3 Fittings in Steel Ports

    Tube O.D. Male Stud End Metric Assembly Torque [Nm] Male Stud End BSPP Assembly Torque [Nm]
    6 M 10x1 18 G 1/8 A 18
    8 M 12x1.5 25 G 1/4 A 35
    10 M 14x1.5 45 G 1/4 A 35
    12 M 16x1.5 55 G 3/8 A 70
    15 M 18x1.5 70 G 1/2 A 90
    16 M 22x1.5 120 G 1/2 A 90
    18 M 22x1.5 120 G 1/2 A 90
    20 M 27x2 180 G 3/4 A 180
    22 M 27x2 180 G 3/4 A 180
    25 M 33x2 310 G 1 A 310
    28 M 33x2 310 G 1 A 310
    30 M 42x2 450 G 1 1/4 A 450
    35 M 42x2 450 G 1 1/4 A 450
    38 M 48x2 540 G 1 1/2 A 540
    42 M 48x2 540 G 1 1/2 A 540

    Assembly Torques for EO-3 Fittings in Ports Made of Material Other Than Steel

    Assembly in ports made of materials that strongly differ in strength and friction from steel generally require modified torques. When the turning angle from fingertight to the recommended torque is more than 30°, a reduction of torque is required. See the chart below for recommended torque reductions:

    Port Material Hardness Torque Reduction
    Steel with use of high performance lubrication All 10%
    Ductile cast iron (e.g. GGG 50) All 10%
    Aluminum HB 150 15%
    HB 125 20%
    HB 100 30%
    < HB 100 35%

     

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    Related Information

    • Thread Guide - Inch Thread
    • Thread Guide - Metric, JIS, BSPP
    • TS1000 Plating
    • Tube End Specs
    • Port End Specs

    Related Information

    • Thread Guide - Inch Thread
    • Thread Guide - Metric, JIS, BSPP
    • TS1000 Plating
    • Tube End Specs
    • Port End Specs