Dynamic Reciprocating O-Ring Glands

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O-ring dimensions

GrooveDetail.bmp (386874 bytes) wpeB5.jpg (17932 bytes)
O-Ring Size O-Ring Gland Actual %      ( C ) Gland Width Groove
AS568A- Cross Section Depth Squeeze Squeeze Clearance No Back-Up One Back-Up Two Back-Ups Radius
004 to 050 .070" +/-.003 .055 to .057 .010 to .018 15 to 25 .002 to .005 .093 to .098 .138 to .143 .205 to .210 .005 to .015
102 to 178 .103" +/-.003 .088 to .090 .010 to .018 10 to 17 .002 to .005 .140 to .145 .171 to .176 .238 to .243 .005 to .015
201 to 284 .139" +/-.004 .121 to .123 .012 to .022 9 to 16 .003 to .006 .187 to .192 .208 to .213 .275 to .280 .010 to .025
309 to 395 .210" +/-.005 .185 to .188 .017 to .030 8 to 14 .003 to .006 .281 to .286 .311 to .316 .410 to .415 .020 to .035
410 to 475 .275" +/-.006 .237 to .240 .029 to .044 11 to 16 .004 to .007 .375 to .380 .408 to .413 .538 to .543 .020 to .035

Clearance is determined by pressure and durometer.  See the chart  Also, consider temperature range variations.
Note: The above chart and information is intended for reference use only.  
Gland design has many variables to consider such as temperature, pressure, range, performance requirements.. 

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