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QUAD-RING® Seals for Non-Rotary Applications Non-rotary Seal Groove Design
  1. Minimum Cross-sectional Squeeze -Increasing the squeeze generally results in a better seal. However, it also shortens seal life. For dynamic low pressure situations, where shrinkage of material is not anticipated, less squeeze may be used. For static or high pressure dynamic applications, when friction is not a critical factor, more squeeze is recommended.
  2. Groove Width - If exceptionally high swelling of the packing material is anticipated, groove width "D" should be increased. At pressures over 1500 psi (103.4 Bar), backup washers should be added to prevent seal extrusion, and groove width should be increased by the thickness of the washer.
  3. Radius - Maintain .005 - .015 (.127-.381mm) radius at bottom of groove, and a maximum .005 (.127mm) radius on corners.
  4. Static QUAD-RING Seals with wide variations in squeeze and groove dimensions can be used with satisfactory results.
  5. Clearance - Refer to Clearance chart (section 4-2) to determine proper diametrical clearance, based on the pressure encountered and the hardness of the rubber compound.
Groove Design - Quad-Rings Without Backup Washers
All surfaces and corners must be free of tool marks, nicks or scratches.
  1. Refer to Clearance Chart (section 4-2) to determine proper diametrical clearance based on the pressure encountered and the hardness of the rubber compound.
  2. Bore Diameter "A" (at upper limit), minus two times Groove Depth "C," equals Piston Groove Diameter "R."
    A - (2 x C) = R

    Rod Diameter "G" (at lower limit), plus two times Groove Depth "C," equals Groove Diameter "F."
    G = (2 x C) = F
  3. For backup washers, increase groove length "D" by thickness of washers used. Use minimum radius in groove.
Recommended Starting Dimensions for Non-Rotary Applications
  Actual Cross-Section Minimum C/S Squeeze Maximum "C" for Minimum C/S Squeeze Groove "D" Axial Dimen.
-.000/+.005in.
(-.000/+.127mm)
Maximum Eccentricty Groove TIR
Seal Number (in) (mm) Dynamic Static1
(in)
Dynamic Static2
(mm)
Dynamic | Static1
(in)
Dynamic | Static2
(mm)
(in) (mm) (in) (mm)
Q4004-Q4050 .070 ± .003 1.780 ± .076 .005 .010 .127 .254 .060/.062 .050/.057 1.524/1.575 1.397/1.448 .080 2.032 .002 .050
Q4102-Q4178 .103 ± .003 2.616 ± .076 .005 .010 .127 .254 .093/.095 .088/.090 2.362/2.413 2.235/2.286 .115 2.921 .002 .050
Q4201-Q4284 .139 ± .004 3.530 ± .101 .006 .012 .152 .304 .127/.129 .121/.123 3.226/3.276 3.073/3.124 .155 3.937 .003 .076
Q4309-Q4395 .210 ± .005 5.334 ± .127 .008 .016 .203 .406 .195/.197 .187/.189 4.953/5.004 4.750/4.800 .240 6.096 .004 .101
Q4425-Q4475 .275 ± .006 6.985 ± .152 .012 .024 .304 .609 .255/.257 .243/.245 6.477/6.528 6.172/6.223 .310 7.874 .005 .127

See chart for O-Ring groove dimensions.
  1. In certain cases (e.g., very close control of concentricities, absence of temperature extremes, etc.) tests may indicate that the squeeze can be reduced (and seal life prolonged) by increasing the groove diameter.
  2. For certain shaft sizes, use of the standard size Series 4 seal may require more peripheral squeeze than is desired for the application. In such cases, use of a special size Series 4 seal is recommended. Contact our Fluid Delivery Team for details.
 


Information Provided by Minnesota Rubber/Quadion Corporation, copyright 2002
Product names are Registered trademarks of Minnesota Rubber, A Quadion Company.