EPS5370 - Section 09 Wear Rings
EPS5370 - Section 09 Wear Rings
Design Guide
Catalog EPS 5370
                   06/2014
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please contact:
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 DAMAGE.
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© Copyright 2007, 2008, 2014, Parker Hannifin Corporation. All rights reserved. Extracts may only be taken with permission. 05/01/2015
Engineering 2
Materials 3
Rod Seals 5
Symmetrical Seals 6
Piston Seals 7
Wipers 8
Back-ups 10
    www.parker.com/eps
Wear Rings / Bearings                                                                                          Catalog EPS 5370/USA
                                           Urethane                              Urethane
                                                                                                                                           9
                                           Head Seal                              O-ring
06/01/2014
    Manufacturing Excellence
       Parker wear rings utilize a precision manufacturing
    process that achieves precise flatness on the bearing
    surfaces, whereas conventional net-molded bearings
    can form “dog bone” cross-sections. The result
    is optimal bearing contact area and compressive
    strength. The cross-sections shown in Figure 9-1
    illustrate the differences between these manufacturing
    methods.
     Precise flatness on           Maximizes bearing contact                  Prolongs cylinder life through uniform
     bearing surface               area and compressive strength,             sideload resistance
                                   eliminating the “dog bone” effect of
                                   conventional net molded wear rings
     Advanced, high                Metal particulates and other               Protects seals from contamination
     performance, polymeric        contaminants can be imbedded in
     materials                     the wear ring material
06/01/2014
                                                                                                                  Pneumatic
are met with maximized value.
                                                                                                 Medium
When pressure and temperature
                                                                                                          Heavy
                                                                                     Light
reach their extremes, WPT and            Series                Description                                                       Page
WRT profiles help reduce the       WPT                  Tight-Tolerance Piston                                                    9-8
seal extrusion gap, assuring the                        Wear Rings
utmost seal performance and
leakage control. When frictional
forces must be kept to a minimum
in pneumatic applications, PTFE    WRT                  Tight-Tolerance Rod                                                      9-12
bearing profiles PDT and PDW                            Wear Rings
provide precision fitting and
minimal frictional losses.
06/01/2014
Ap = ØD x W
    Figure 9-2: Total affected pressure   where D is the bearing O.D. for pistons or the bearing I.D. for rods, and
    area, AP                              W is the bearing width.
                                                                                                              06/01/2014
                       5                              5
                                            W
                                                                              Butt Cut         Angle Cut           Step Cut
Figure 9-3: Load distribution of radial force, F, and effective         Figure 9-4: End cuts
load area, AL
                                                                                                                         06/01/2014
06/01/2014
Compressive Strength, q         psi          50000                 50000        50000              50000        ASTM D695, 73°F
Tensile Strength                psi          11000                 11000        11000              11000        ASTM D638, 73°F
Tensile Modulus                Kpsi           500                   500          500                500         ASTM D638, 73°F
Coefficient of Friction         —          0.13 - 0.20         0.15 - 0.20   0.15 - 0.20         0.13 - 0.20    ASTM D790, 73°F
Water Absorption                                                                                                24 hour immersion,
                                %              0.1                  0.1          0.1                 0.1        ASTM D570, 73°F
Temperature Range               °F         -40 to +200         -40 to +200   -40 to +400         -40 to +400               —
Rockwell M Hardness             —             100                  100           100                100         ASTM D785
12/01/2014
                            Technical Data
                            Standard Material
                            W4733 WearGard™
                            Radial Tolerance
                            +.000"/ -.002" (up to 6" O.D.); +.000/-.003" (6" to 12" O.D.)
                            End Cuts
                            Butt Cut, Angle Cut (Skive Cut), Step Cut
                            Options
                            Virtually any width can be produced without assessing a setup charge.
                            Additionally, other cross-sections not shown are available when required.
WPT Cross-Section
06/01/2014
4 7 3 3 WPT 1 2 5 – 0 4 0 0 0 – 0 5 0 0
NOTE: For sizes larger than those shown in the table, please contact your local Parker representative.
06/01/2014
            A                       B                       C                       D                          Part Number
           Bore                   Groove                  Piston                  Groove
         Diameter                Diameter                Diameter                 Width
06/01/2014
                                                                                                               WPT Profile
Gland Dimensions — WPT Profile
Table 9-8. WPT Profile — Piston Gland Dimensions, ·Parker Standard Sizes (cont’d)
                                   Hardware Dimensions
        A                       B                       C                       D                          Part Number
       Bore                   Groove                  Piston                  Groove
     Diameter                Diameter                Diameter                 Width
06/01/2014
                            Technical Data
                            Standard Material
                            W4733 WearGard™
                            Radial Tolerance
                            +.000"/-.002" (up to 5-3/4" I.D.); +.000/-.003" (5-3/4" to 7" I.D.)
                            End Cuts
                            Butt Cut, Angle Cut (Skive Cut), Step Cut
                            Options
                            Virtually any width can be produced without assessing a setup charge.
                            Additionally, other cross-sections not shown are available when required.
        WRT Cross-Section
06/01/2014
4 7 3 3 WRT 1 2 5 – 0 2 0 0 0 – 0 7 5 0
                                   W
                                                                       A1         B1         C1          Please refer to Engineering Section 2,
                                                                                                         page 2-8 for surface finish and additional
                                                                                                         hardware considerations.
06/01/2014
            A1                      B1                      C1                      D                          Part Number
           Rod                    Groove                  Throat                  Groove
         Diameter                Diameter                Diameter                 Width
06/01/2014
        A1                      B1                      C1                      D                          Part Number
       Rod                    Groove                  Throat                  Groove
     Diameter                Diameter                Diameter                 Width
06/01/2014
                                       Technical Data
                                       Standard Material
                                       0401 – 40% Bronze-Filled PTFE
                                       0307 – 23% Carbon, 2% Graphite-Filled PTFE
                                       Others available upon request
                                       Radial Tolerance
                                       +.000"/-.004"
                                       End Cuts
                                       Butt Cut, Angle Cut (Skive Cut), Step Cut
                                       Options
        PDT Cross-Section
                                       Virtually any width, diameter and cross-section can be produced without
                                       assessing a setup charge.
0 4 0 1 PDT A 0 1 0 0 0 A 0 2 5 0
0 3 0 7 PDT H 0 9 3 – 0 6 2 5
06/01/2014
                     1.500 - 4.875      +.002/-.000      Dia. A - .187           +.000/-.002   Dia. A - .021    +.000/-.002    D = W + .010
          B          5.000 - 7.750      +.004/-.000      Dia. A - .187           +.000/-.003   Dia. A - .022    +.000/-.003    D = W + .010
       (.093)
                     8.000 - 10.000     +.006/-.000      Dia. A - .187           +.000/-.004   Dia. A - .023    +.000/-.004    D = W + .010
                     2.000 - 4.875      +.002/-.000      Dia. A - .251           +.000/-.002   Dia. A - .021    +.000/-.002    D = W + .010
          C          5.000 - 7.750      +.004/-.000      Dia. A - .251           +.000/-.003   Dia. A - .022    +.000/-.003    D = W + .010
       (.125)
                     8.000 - 16.000     +.006/-.000      Dia. A - .251           +.000/-.004   Dia. A - .023    +.000/-.004    D = W + .010
    For custom groove calculations, see Appendix C.
    NOTE: For sizes larger than those shown in the table, please contact your local Parker Seal representative.
9
    Table 9-15. PDT Profile — Rod Gland Calculation (Cut-to-Length)
                                   A1                                 B1                                   C1                       D
        Style                 Rod Diameter                      Groove Diameter                      Throat Diameter           Groove Width
     (Thickness)
                        Range                 Tol        Calculation                  Tol.      Calculation         Tol.        +.010/-.000
          D          0.875 - 2.000      +.000/-.002     Dia. A1 + .125           +.002/-.000   Dia. A1 + .021   +.002/-.000    D = W + .010
       (.062)
          E          1.500 - 5.000      +.000/-.002     Dia. A1 + .187           +.002/-.000   Dia. A1 + .021   +.002/-.000    D = W + .010
       (.093)
                     1.500 - 3.125      +.000/-.002     Dia. A1 + .251           +.002/-.000   Dia. A1 + .021   +.002/-.000    D = W + .010
          F          3.250 - 4.625      +.000/-.002     Dia. A1 + .251           +.002/-.000   Dia. A1 + .021   +.002/-.000    D = W + .010
       (.125)        4.750 - 7.500      +.000/-.004     Dia. A1 + .251           +.003/-.000   Dia. A1 + .022   +.003/-.000    D = W + .010
                     7.500 -10.000      +.000/-.006     Dia. A1 + .251           +.004/-.000   Dia. A1 + .023   +.004/-.000    D = W + .010
    For custom groove calculations, see Appendix C.
    NOTE: For sizes larger than those shown in the table, please contact your local Parker Seal representative.
                                                                                                                                     11/01/2014
Table 9-16. PDT Bulk Strip Sizes Table 9-17. Recommended Cutting Instructions
               T                          W                                                                  G               CL ±
                                                                              Rod or Bore
     Radial Cross-Section                Width                                                            Minimum        Tolerance for
                                                                               Diameter                     Gap           Cut Length
For Pistons:
CL = [(Bore Diameter – T) x p] – G
For Rods:
CL = [(Rod Diameter + T) x p] – G
06/01/2014
                                         Technical Data
                                         Standard Material
                                         0401 – 40% Bronze-Filled PTFE
                                         0307 – 23% Carbon, 2% Graphite-Filled PTFE
                                         Alternate Materials (Composite Fabric-Reinforced Resins)
                                         0810 – Standard Polyester-based with PTFE
                                         0811 - Graphite-filled Polyester Based
                                         0812 - MoS2-filled Polyester Based
                                         0813 - PTFE-Filled Polyester Based
                                         Additional materials available upon request.
                                         Radial Tolerance
                                         +.000"/-.004"
                                         End Cuts
                                         Butt Cut, Angle Cut (Skive Cut), Step Cut
                                         Options
9                                        Virtually any width, diameter and cross-section can be produced without
                                         assessing a setup charge.
0 4 0 1 PDW C 0 4 5 0 0 B 0 5 0 0
Material                       Profile Wear Ring Radial                       Cut Type         Wear Ring Nominal
4 Digit Material Code                  Cross-Section Style                    Examples:        Width (W) (x1000)
Example:                               Examples:                              A = Angle Cut Example:
0401 = Bronze-filled                   A = Piston; 0.062" thick               B = Butt Cut     0.500" X 1000 = 0500
         PTFE                          B = Piston; 0.093" thick               C = Step Cut     (0125 to 2000 or larger)
(0401, 0307, Others                    C = Piston; 0.125" thick
Available)                             D = Rod; 0.062" thick Nominal Diameter (x1000)
                                       E = Rod; 0.093" thick    Example: “C” Style, 04500 = 4.500"
                                       F = Rod; 0.125" thick    Bore
                                                                (Bore Dia. for Styles A, B, C)
                                                                (Rod Dia. for Styles D, E, F)
                              W
                                                                   A        B               C            Please refer to Engineering Section 2,
                                                                                                         page 2-8 for surface finish and additional
                                                                                                         hardware considerations.
                   2.000 - 4.999      +.002/-.000       Dia. A - .251           +.000/-.002         Dia. A - .021     +.000/-.002    D = W + .010
        C          5.000 - 7.999      +.004/-.000       Dia. A - .251           +.000/-.003         Dia. A - .022     +.000/-.003    D = W + .010
     (.125)
                   8.000 - 16.000     +.006/-.000       Dia. A - .251           +.000/-.004         Dia. A - .023     +.000/-.004    D = W + .010
01/13/2015
                               W
                                                                A1       B1         C1           Please refer to Engineering Section 2,
                                                                                                 page 2-8 for surface finish and additional
                                                                                                 hardware considerations.
                    3.250 - 4.625      +.000/-.002      Dia. A1 + .251        +.002/-.000   Dia. A1 + .021   +.002/-.000    D = W + .010
          F
       (.125)
                    4.750 - 7.500      +.000/-.004      Dia. A1 + .251        +.003/-.000   Dia. A1 + .022   +.003/-.000    D = W + .010
7.500 - 10.000 +.000/-.006 Dia. A1 + .251 +.004/-.000 Dia. A1 + .023 +.004/-.000 D = W + .010
11/01/2014
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MOTION
   STATIC           RECIPROCATING               OSCILLATORY             ROTARY
PRODUCT TYPE
NON-ROTARY — FILL OUT SECOND PAGE                                      ROTARY — FILL OUT THIRD PAGE
   ROD/SHAFT                  WIPER                                      SOLID SEAL                PTFE LIP SEAL
   PISTON                     BEARING                                    SPLIT SEAL                ELASTOMER LIP SEAL
   INTERNAL FACE              VANE                                       BEARING ISOLATOR
   EXTERNAL FACE              NON-SEAL
01/09/06
06/01/2014
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                                                                 A-1
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    Catalog
    Catalog EPS
            EPS5370/USA
                5350/USA
    Design  Action
    Design Action  Request
                  Request    Form
                          Form
A
A
    OPERATING PARAMETERS               UNIT (CIRCLE ONE)                              MINIMUM        OPERATING           MAXIMUM
    TEMPERATURE:                       °K °F °C                                      ____________   ____________        ____________
    P R E SS U R E :                   PSI BAR MPA                                   ____________   ____________        ____________
    STROKE LENGTH (RECIPROCATING):     INCH MM                                                      ____________        ____________
    CYCLE RATE:                        CYCLES/MIN CYCLES/HR                     HZ                  ____________        ____________
    DEGREE OF ARC (OSCILLATING):       DEGREES                                       ____________   ____________        ____________
    VELOCITY:                          FT/MIN. MM/MIN.                               ____________   ____________        ____________
    VACUUM:                            IN HG TORR                                    ____________   ____________        ____________
    ROTARY SPEED                       RPM                                           ____________   ____________        ____________
    MEDIA TO BE SEALED: __________________________________
                                                                                                                                      D
                                                               B C A
     C B A
                                                   F
                                                       A B C
                                                                                                        A B C
                                                                                                                               06/01/2014
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Fraction/aMetric
English   l/Decim al/Metric CoFractions
                 Conversions: nversion                                                                       CatalogEPS
                                                                                                             Catalog EPS 5350/USA
                                                                                                                         5370/USA
Fractional   Decimal   Metric   Fractional   Decimal    Metric         Fractional   Decimal   Metric      Fractional   Decimal    Metric
                                                                                                                                            B
    —         0.004     0.10      37/64       0.578     14.68           1 15/32      1.469    37.31           —         2.874      73.00
    —         0.010     0.25        —         0.591     15.00              —         1.496    38.00          2 7/8      2.875      73.03
   1/64       0.016     0.40      19/32       0.594     15.08             1 1/2      1.500    38.10           —         2.913      74.00
    —         0.020     0.50      39/64       0.609     15.48           1 17/32      1.531    38.89        2 15/16      2.938      74.61
    —         0.030     0.75        5/8       0.625     15.88              —         1.535    39.00           —         2.953      75.00
   1/32       0.031     0.79        —         0.630     16.00            1 9/16      1.562    39.69           —         2.992      76.00
    —         0.039     1.00      41/64       0.641     16.27              —         1.575    40.00            3        3.000      76.20
   3/64       0.047     1.19        —         0.650     16.50           1 19/64      1.594    40.48           —         3.032      77.00
    —         0.059     1.50      21/32       0.656     16.67              —         1.614    41.00         3 1/16      3.062      77.79
   1/16       0.063     1.59        —         0.669     17.00             1 5/8      1.625    41.28           —         3.071      78.00
   5/64       0.078     1.98      43/64       0.672     17.01              —         1.654    42.00           —         3.110      79.00
    —         0.079     2.00      11/16       0.688     17.46           1 21/32      1.656    42.07          3 1/8      3.125      79.38
   3/32       0.094     2.38      45/64       0.703     17.86           1 11/16      1.688    42.86           —         3.150      80.00
    —         0.098     2.50        —         0.709     18.00              —         1.693    43.00         3 3/16      3.188      80.96
   7/64       0.109     2.78      23/32       0.719     18.26           1 23/32      1.719    43.66           —         3.189      81.00
    —         0.118     3.00        —         0.728     18.49              —         1.732    44.00           —         3.228      82.00
    1/8       0.125     3.18      47/64       0.734     18.65             1 3/4      1.750    44.50         3 1/4       3.250      82.55
    —         0.138     3.50        —         0.748     19.00              —         1.772    45.00           —         3.268      83.00
   9/64       0.141     3.57        3/4       0.750     19.05           1 25/32      1.781    45.24           —         3.307      84.00
   5/32       0.156     3.97      49/64       0.766     19.45              —         1.811    46.00         3 5/16      3.312      84.14
    —         0.158     4.00      25/32       0.781     19.84           1 13/16      1.813    46.04           —         3.346      85.00
  11/64       0.172     4.37        —         0.787     20.00           1 27/32      1.844    46.83          3 3/8      3.375      85.73
    —         0.177     4.50      51/64       0.797     20.24              —         1.850    47.00           —         3.386      86.00
   3/16       0.188     4.76      13/16       0.813     20.64             1 7/8      1.875    47.63           —         3.425      87.00
    —         0.197     5.00        —         0.827     21.00              —         1.890    48.00         3 7/16      3.438      87.31
  13/64       0.203     5.16      53/64       0.828     21.03           1 29/32      1.906    48.42           —         3.465      88.00
    —         0.217     5.50      27/32       0.844     21.43              —         1.929    49.00         3 1/2       3.500      88.90
   7/32       0.219     5.56      55/64       0.859     21.83           1 15/16      1.938    49.21           —         3.504      89.00
  15/64       0.234     5.95        —         0.866     22.00              —         1.970    50.00           —         3.543      90.00
    —         0.236     6.00        7/8       0.875     22.23           1 31/32      1.970    50.01         3 9/16      3.562      90.49
    1/4       0.250     6.35      57/64       0.891     22.62               2        2.000    50.80           —         3.583      91.00
    —         0.256     6.50        —         0.906     23.00              —         2.008    51.00           —         3.622      92.00
  17/64
    —
              0.266
              0.276
                        6.75
                        7.00
                                  29/32
                                  59/64
                                              0.906
                                              0.922
                                                        23.02
                                                        23.42
                                                                           —
                                                                         2 1/16
                                                                                     2.047
                                                                                     2.062
                                                                                              52.00
                                                                                              52.39
                                                                                                            3 5/8
                                                                                                              —
                                                                                                                        3.625
                                                                                                                        3.661
                                                                                                                                   92.08
                                                                                                                                   93.00
                                                                                                                                            G
   9/32
    —
              0.281
              0.295
                        7.14
                        7.50
                                  15/16
                                    —
                                              0.938
                                              0.945
                                                        23.81
                                                        24.00
                                                                           —
                                                                          2 1/8
                                                                                     2.087
                                                                                     2.125
                                                                                              53.00
                                                                                              53.98
                                                                                                           3 11/16
                                                                                                              —
                                                                                                                        3.688
                                                                                                                        3.701
                                                                                                                                   93.66
                                                                                                                                   94.00
                                                                                                                                            G
  19/64       0.297     7.54      61/64       0.953     24.21              —         2.126    54.00           —         3.740      95.00
   5/16       0.313     7.94      31/32       0.969     24.61              —         2.165    55.00          3 3/4      3.750      95.25
    —         0.315     8.00        —         0.984     25.00            2 3/16      2.188    55.56           —         3.780      96.00
  21/64       0.328     8.33         1        1.000     25.40              —         2.205    56.00        3 13/16      3.813      96.84
    —         0.335     8.50        —         1.024     26.00              —         2.244    57.00           —         3.819      97.00
  11/32       0.344     8.73      1 1/32      1.031     26.19             2 1/4      2.250    57.15           —         3.858      98.00
    —         0.354     9.00      1 1/16      1.062     26.99              —         2.284    58.00         3 7/8       3.875      98.43
  23/64       0.359     9.13        —         1.063     27.00            2 5/16      2.312    58.74           —         3.898      99.00
    —         0.374     9.50      1 3/32      1.094     27.78              —         2.323    59.00           —         3.937     100.00
    3/8       0.375     9.53        —         1.102     28.00              —         2.362    60.00        3 15/16      3.938     100.01
  25/64       0.391     9.92       1 1/8      1.125     28.58             2 3/8      2.375    60.33           —         3.976     101.00
    —         0.394    10.00        —         1.148     29.00              —         2.402    61.00            4        4.000     101.60
  12/32       0.406    10.32      1 5/32      1.156     29.37            2 7/16      2.438    61.91         4 1/16      4.062     103.19
    —         0.413    10.50        —         1.181     30.00              —         2.441    62.00          4 1/8      4.125     104.78
  27/64       0.422    10.72      1 3/16      1.188     30.16              —         2.480    63.00           —         4.134     105.00
    —         0.433    11.00      1 7/32      1.219     30.96             2 1/2      2.500    63.50         4 3/16      4.188     106.36
   7/16       0.438    11.11        —         1.221     31.00              —         2.520    64.00         4 1/4       4.250     107.95
  29/64       0.453    11.51       1 1/4      1.250     31.75              —         2.559    65.00         4 5/16      4.312     109.54
  15/32       0.469    11.91        —         1.260     32.00            2 9/16      2.562    65.09           —         4.331     110.00
    —         0.472    12.00      1 9/32      1.281     32.54              —         2.598    66.00          4 3/8      4.375     111.13
  31/64       0.484    12.30        —         1.299     33.00             2 5/8      2.625    66.68         4 7/16      4.438     112.71
    —         0.492    12.50      1 5/16      1.312     33.34              —         2.638    67.00          4 1/2      4.500     114.30
    1/2       0.500    12.70        —         1.339     34.00              —         2.677    68.00           —         4.528     115.00
    —         0.512    13.00     1 11/32      1.344     34.13           2 11/16      2.688    68.26         4 9/16      4.562     115.89
  33/64       0.516    13.10       1 3/8      1.375     34.93              —         2.717    69.00         4 5/8       4.625     117.48
  17/32       0.531    13.50        —         1.378     35.00             2 3/4      2.750    69.85           —         4.724     120.00
  35/64       0.547    13.90     1 13/32      1.406     35.72              —         2.756    70.00         4 3/4       4.750     120.65
    —         0.551    14.00        —         1.417     36.00              —         2.795    71.00          4 7/8      4.875     123.83
   9/16       0.563    14.29      1 7/16      1.438     36.51           2 13/16      2.813    71.44           —         4.921     125.00
    —         0.571    14.50        —         1.457     37.00              —         2.835    72.00            5        5.000     127.00
03/03/06
                             4,0
                                                                                                                    150
                                     A straight-edge lined up with the values on any pair of vertical
              0.125                  lines will cross the third line at the approximate corresponding
                             3,0
                                     value; e.g. when set at 1.000 in. shaft diameter and 4000 rpm, it
              0.100                  crosses the middle line at 1050 sfpm.                                          100
03/03/06
    Pressure Conversion
    Pressure: PSI / Bar                                              PSI / BAR                               Catalog EPS 5350/USA
03/03/06
Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit
B      -169
       -168
                   -273
                   -270
                              -7.8
                              -7.2
                                          18
                                          19
                                                       17.8
                                                       18.3
                                                                      64
                                                                      65
                                                                                 93
                                                                                 99
                                                                                            200
                                                                                            210
                                                                                                             343
                                                                                                             349
                                                                                                                          650
                                                                                                                          660
       -162        -260       -6.7        20           18.9           66        100         212              354          670
       -157        -250       -6.1        21           19.4           67        104         220              360          680
       -151        -240       -5.6        22            20            68        110         230              366          690
       -146        -230        -5         23           20.6           69        116         240              371          700
       -140        -220       -4.4        24           21.1           70        121         250              377          710
       -134        -210       -3.9        25           21.7           71        127         260              382          720
       -129        -200       -3.3        26           22.2           72        132         270              388          730
       -123        -190       -2.8        27           22.8           73        138         280              393          740
       -118        -180       -2.2        28           23.3           74        143         290              399          750
       -112        -170       -1.7        29           23.9           75        149         300              404          760
       -107        -160       -1.1        30           24.4           76        154         310              410          770
       -101        -150       -0.6        31            25            77        160         320              416          780
        -96        -140        0          32           25.6           78        166         330              421          790
        -90        -130        0.6        33           26.1           79        171         340              427          800
        -84        -120        1.1        34           26.7           80        177         350              432          810
        -79        -110        1.7        35           27.2           81        182         360              438          820
        -73        -100        2.2        36           27.8           82        188         370              443          830
        -68        -90         2.8        37           28.3           83        193         380              449          840
        -62        -80         3.3        38           28.9           84        199         390              454          850
        -57        -70         3.9        39           29.4           85        204         400              460          860
        -51        -60         4.4        40            30            86        210         410              466          870
        -46        -50         5          41           30.6           87        216         420              471          880
        -40        -40         5.6        42           31.1           88        221         430              477          890
        -34        -30         6.1        43           31.7           89        227         440              482          900
        -29        -20         6.7        44           32.2           90        232         450              488          910          G
        -23        -10         7.2        45           32.8           91        238         460              493          920
       -17.8        0          7.8        46           33.3           92        243         470              499          930
       -17.2        1          8.3        47           33.9           93        249         480              504          940
       -16.7        2          8.9        48           34.4           94        254         490              510          950
       -16.1        3          9.4        49            35            95        260         500              516          960
       -15.6        4          10         50           35.6           96        266         510              521          970
        -15         5         10.6        51           36.1           97        271         520              527          980
       -14.4        6         11.1        52           36.7           98        277         530              532          990
       -13.9        7         11.7        53           37.2           99        282         540              538          1000
       -13.3        8         12.2        54           37.8           100       288         550              549          1020
       -12.8        9         12.8        55            43            110       293         560              560          1040
       -12.2       10         13.3        56            49            120       299         570              571          1060
       -11.7       11         13.9        57            54            130       304         580              582          1080
       -11.1       12         14.4        58            60            140       310         590              593          1100
       -10.6       13          15         59            66            150       316         600              604          1120
        -10        14         15.6        60            71            160       321         610              616          1140
       -9.4        15         16.1        61            77            170       327         620              627          1160
       -8.9        16         16.7        62            82            180       332         630              638          1180
       -8.3        17         17.2        63            88            190       338         640              649          1200
03/03/06
Contents                                            There are times when using standard seal groove dimensions is not
                                                  an option. Whether it is for cylinders that have been refinished or off
Piston Gland............................... C-1   sized metal, there are some simple calculations to use to determine
Rod Seal and Rod Wiper............ C-2            what the appropriate groove dimensions should be. The formulas for
                                                  calculating custom groove dimensions are included below.                          C
Piston Wear Ring........................ C-2
Rod Wear Ring........................... C-3
06/01/2014
      Subtract the required rod diameter from the next largest standard rod diameter to determine the Offset
    Factor. Apply the Offset Factor to the Groove Diameter, X, and the Throat Diameter, Y, as shown below.
    Groove Width, Z, will remain unchanged.
    Offset Factor Diameter                                    If the required diameter is larger than the standard
C                                                             diameter, a negative Offset Factor will be calculated,
         Offset =   Standard                Required          and the rod seal will be stretched. In most
         Factor		              –
                  Rod Diameter		          Rod Diameter        circumstances, Parker advises against stretching
                                                              smaller sizes of rod seals to fit oversized rods.
                                                              Please contact your local Parker representative for
    New Groove Diameter, X:                                   assistance in these cases.
       C =
             Min. Groove + 2 X Min. Cross – 2 X Desired Min. Radial
              Diameter				 Section				 Metal-to-Metal Clearance
             D =
               Nominal Width, W + .010"
              					
                                                                                                               01/13/2015
  The formula for calculating rod wear ring grooves using alternative extrusion gaps metal-to-metal clearances
and machining tolerances:
  C1 =
         Max. Groove - 2 X Min. Cross + 2 X Desired Min. Radial
          Diameter				      Section				 Metal-to-Metal Clearance
         D =
           Nominal Width, W + .010"
          					
01/13/2015
06/01/2014
C Gland Depth
              Gland
                                                                                                                                       D
              Depth
A E B
A D B
Rod Piston
Table D-1A. Rod Gland Dimension Tolerances                        Table D-1B. Piston Gland Dimension Tolerances
 Nominal        A             B           C           D               Nominal       B              A           C            E
  Gland        Rod          Groove      Groove      Throat             Gland       Bore          Groove      Groove      Piston
  Depth      Diameter      Diameter      Width     Diameter            Depth     Diameter       Diameter      Width     Diameter
    1/8     +.000/-.001   +.002/-.000             +.002/-.000            1/8    +.003/-.000    +.000/-.001             +.000/-.001
   3/16     +.000/-.001   +.002/-.000             +.002/-.000           3/16    +.003/-.000    +.000/-.002             +.000/-.001
    1/4     +.000/-.002   +.003/-.000 +.010/-.010 +.003/-.000            1/4    +.003/-.000    +.000/-.003 +.010/-.010 +.000/-.001
   5/16     +.000/-.002   +.004/-.000             +.004/-.000           5/16    +.003/-.000    +.000/-.004             +.000/-.002
   3/8      +.000/-.002   +.005/-.000             +.004/-.000           3/8     +.004/-.000    +.000/-.005             +.000/-.002
Please refer to Engineering Section 2, page 2-8 for surface finish and additional hardware considerations.
06/01/2014
        A                   B                  C                    D               E
                         (Rod)
      Rod                                  (Rod)
                        Groove
    Diameter                            Groove Width                              (Bore)
                       Diameter                                Throat                                 Part Number
                                                                                  Piston
     (Bore)                                                   Diameter*
                         Bore              (Bore)                               Diameter**
     Groove            Diameter         Groove Width
    Diameter
      0.125               0.375              0.156               0.126            0.373               42956226-41
      0.187               0.437              0.156               0.188            0.435               42956226-42
      0.250               0.500              0.156               0.251            0.498               42956226-43
      0.312               0.562              0.156               0.313            0.560               42956226-44
      0.375               0.625              0.156               0.376            0.623               42956226-45
      0.437               0.687              0.156               0.438            0.685               42956226-46               D
      0.500               0.750              0.156               0.501            0.748               42956226-47
      0.625               1.000              0.218               0.626            0.998               42956226-48
      0.750               1.125              0.218               0.751            1.123               42956226-49
      0.875               1.250              0.218               0.876            1.248               42956226-50
      1.000               1.375              0.218               1.001            1.373               42956226-51
      1.125               1.500              0.218               1.126            1.498               42956226-52
      1.250               1.625              0.218               1.251            1.623               42956226-53
*If used with wear rings, refer to wear ring throat diameter, see Section 9.
**If used with wear rings, refer to wear ring piston diameter, see Section 9.
For custom groove calculations, see Appendix C.
 Part numbers shown as example only. Consult www.parker.com/eps/FluidPower for part number availability.
Contact your Parker representative for assistance.
06/01/2014
06/01/2014
Gland Dimensions
             Please refer to Engineering Section 2, page 2-8 for surface finish and
             additional hardware considerations.
11/01/2014
06/01/2014
                                              A
                                                                            E            Please refer to Engineering Section 2,
                                                                                         page 2-8 for surface finish and additional       F
                                                                     D                   hardware considerations.
F    142
     143
             2.383
             2.445
                      .085/.087
                      .085/.087
                                  .045/.052
                                  .045/.052
                                              .000/.006
                                              .000/.006
                                                            22
                                                            22
                                                                          327
                                                                          328
                                                                                   1.763
                                                                                   1.888
                                                                                            .182/.184
                                                                                            .182/.184
                                                                                                          .065/.075
                                                                                                          .065/.075
                                                                                                                      .000/.007
                                                                                                                      .000/.007
                                                                                                                                      22
                                                                                                                                      22
     144     2.508    .085/.087   .045/.052   .000/.006     22            329      2.013    .182/.184     .065/.075   .000/.007       22
     145     2.570    .085/.087   .045/.052   .000/.006     22            330      2.138    .182/.184     .065/.075   .000/.007       22
     146     2.633    .085/.087   .045/.052   .000/.006     22            331      2.268    .182/.184     .065/.075   .000/.007       22
     147     2.695    .085/.087   .045/.052   .000/.006     22            332      2.393    .182/.184     .065/.075   .000/.007       22
     148     2.758    .085/.087   .045/.052   .000/.006     22            333      2.518    .182/.184     .065/.075   .000/.007       22
     149     2.820    .085/.087   .045/.052   .000/.006     22            334      2.643    .182/.184     .065/.075   .000/.007       22
     210     0.766    .118/.120   .045/.052   .000/.006     22            335      2.768    .182/.184     .065/.075   .000/.007       22
     211     0.828    .118/.120   .045/.052   .000/.006     22            336      2.893    .182/.184     .065/.075   .000/.007       22
     212     0.891    .118/.120   .045/.052   .000/.006     22            337      3.018    .182/.184     .065/.075   .000/.007       22
     213     0.953    .118/.120   .045/.052   .000/.006     22            338      3.143    .182/.184     .065/.075   .000/.007       22
     214     1.016    .118/.120   .045/.052   .000/.006     22            339      3.273    .182/.184     .065/.075   .000/.007       22
     215     1.078    .118/.120   .045/.052   .000/.006     22            340      3.398    .182/.184     .065/.075   .000/.007       22
     216     1.141    .118/.120   .045/.052   .000/.006     22            341      3.523    .182/.184     .065/.075   .000/.007       22
     217     1.203    .118/.120   .045/.052   .000/.006     22            342      3.648    .182/.184     .065/.075   .000/.007       22
     218     1.266    .118/.120   .045/.052   .000/.006     22            343      3.773    .182/.184     .065/.075   .000/.007       22
     219     1.344    .118/.120   .045/.052   .000/.006     22            344      3.898    .182/.184     .065/.075   .000/.007       22
     220     1.397    .118/.120   .045/.052   .000/.006     22            345      4.028    .182/.184     .065/.075   .000/.007       22
     221     1.459    .118/.120   .045/.052   .000/.006     22            346      4.153    .182/.184     .065/.075   .000/.007       22
     222     1.522    .118/.120   .045/.052   .000/.006     22            347      4.278    .182/.184     .065/.075   .000/.007       22
     223     1.647    .118/.120   .045/.052   .000/.007     22            348      4.403    .182/.184     .065/.075   .000/.007       22
     224     1.772    .118/.120   .045/.052   .000/.007     22            349      4.528    .182/.184     .065/.075   .000/.007       22
     225     1.897    .118/.120   .045/.052   .000/.007     22            425      4.551    .235/.237     .106/.110   .000/.008       22
     226     2.022    .118/.120   .045/.052   .000/.007     22            426      4.676    .235/.237     .106/.110   .000/.008       22
     227     2.147    .118/.120   .045/.052   .000/.007     22            427      4.801    .235/.237     .106/.110   .000/.008       22
     228     2.272    .118/.120   .045/.052   .000/.007     22            428      4.926    .235/.237     .106/.110   .000/.008       22
     229     2.397    .118/.120   .045/.052   .000/.007     22            429      5.051    .235/.237     .106/.110   .000/.008       22
     230     2.522    .118/.120   .045/.052   .000/.007     22            430      5.176    .235/.237     .106/.110   .000/.008       22
     231     2.631    .118/.120   .045/.052   .000/.007     22            431      5.301    .235/.237     .106/.110   .000/.008       22
     232     2.756    .118/.120   .045/.052   .000/.007     22            432      5.426    .235/.237     .106/.110   .000/.008       22
                                                                         NOTE: Measure Split Gap using a Mandrel with “A” Diameter.
06/01/2014
                             Seal Dimensions
 Dash
   #                   B                                    E
             A                                  D
  MS                 Radial        C                       Split
           Inside                              Split
 28774               Cross-       Width                   Angle
            Dia.                               Gap
                     Section                              Degree
          +.001/
           -.001
  433      5.551     .235/.237   .106/.110   .000/.008       22
  434      5.676     .235/.237   .106/.110   .000/.008       22
  435      5.801     .235/.237   .106/.110   .000/.008       22
  436      5.926     .235/.237   .106/.110   .000/.008       22
  437      6.051     .235/.237   .106/.110   .000/.008       22
  438      6.274     .235/.237   .106/.110   .000/.008       22
  439      6.524     .235/.237   .106/.110   .000/.008       22
  440      6.774     .235/.237   .106/.110   .000/.008       22
  441      7.024     .235/.237   .106/.110   .000/.008       22
  442      7.274     .235/.237   .106/.110   .000/.008       22
  443      7.524     .235/.237   .106/.110   .000/.008       22
  444      7.774     .235/.237   .106/.110   .000/.008       22
  445      8.024     .235/.237   .106/.110   .000/.008       22
  446      8.524     .235/.237   .106/.110   .000/.008       22
  447      9.024     .235/.237   .106/.110   .000/.008       22
  448      9.524     .235/.237   .106/.110   .000/.008       22
  449     10.024     .235/.237   .106/.110   .000/.008       22
  450
  451
          10.524
          11.024
                     .235/.237
                     .235/.237
                                 .106/.110
                                 .106/.110
                                             .000/.008
                                             .000/.008
                                                             22
                                                             22
                                                                                                                                          F
  452     11.524     .235/.237   .106/.110   .000/.008       22
  453     12.024     .235/.237   .106/.110   .000/.008       22
  454     12.524     .235/.237   .106/.110   .000/.008       22
  455     13.024     .235/.237   .106/.110   .000/.008       22
  456     13.524     .235/.237   .106/.110   .000/.008       22
  457     14.024     .235/.237   .106/.110   .000/.008       22
  458     14.524     .235/.237   .106/.110   .000/.008       22
  459     15.024     .235/.237   .106/.110   .000/.008       22
  460     15.524     .235/.237   .106/.110   .000/.008       22
NOTE: Measure Split Gap using a Mandrel with “A” Diameter.
NOTE: For sizes larger than those shown in the table, please contact your local Parker Seal representative.
06/01/2014
06/01/2014
06/01/2014
06/01/2014
06/01/2014
                                                            Belgium
                                                            Parker Hannifin,
                                                            Advanced Products, NV
                                                            phone 32 3 880 81 50
                                                            fax 32 3 888 48 62
                                                                                                                       wer Seal
                                                                    Your Local Authorized Parker Distributor   Design Guide
                                                                     EPS 5370        Digital       05/2015
                                                                                                               Catalog EPS 5370
                             Parker Hannifin Corporation
                                                                                                                                  06/2014
                             Engineered Polymer Systems Division
                             2220 South 3600 West
                             Salt Lake City, UT 84119
                             phone 801 972 3000
                             fax 801 973 4019
                             www.parker.com/eps                                                 U.S. $75.00