O-Ring Standard (AS568B) Groove Design

Standard Groove Design AS568B

O-Ring Standard (AS568B) Groove Design

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Extrusion Limits       [ Standard AS568B ]       Metric       Dovetail

The three main types of standard groove designs are Industrial Static also called Radial, Industrial Reciprocating also called Dynamic, and Face Seals also called Axial or Flange. Radial and Dynamic seals require the presence of a diametrical clearance gap for installation. Face seals have no clearance gap, but consist of a groove cut into one flange with a flat mating flange bolted together to give a surface to surface contact.

Face Seal (Axial / Flange) Glands [PDF]
Gland Dimensions Face Seal

    Gland Squeeze Groove Width Groove  
AS568B CS Depth Inches % Liquids Gases Radius
-004 to -050 .070 +/-
.003
.050 to .054 .013 to .023 19 to 32 .101 to .107 .084 to .089 .005 to .015
-102 to -178 .103 +/-
.003
.074 to .080 .020 to .032 20 to 30 .136 to .142 .120 to .125 .005 to .015
-201 to -284 .139 +/-
.004
.101 to .107 .028 to .042 20 to 30 .177 to .187 .158 to .164 .010 to .025
-309 to -395 .210 +/-
.005
.152 to .162 .043 to .063 21 to 30 .270 to .290 .239 to .244 .020 to .035
-425 to -475 .275 +/-
.006
.201 to .211 .058 to .080 21 to 29 .342 to .362 .309 to .314 .020 to .035

CS Cross Section




Industrial Static (Radial) Glands [PDF]
Gland Dimensions Industrial Static Seal

    Gland Squeeze   Groove Width Groove  
AS568B CS Depth Inches % DC 0 BR 1 BR 2 BR Radius
-004 to  -050 .070 +/-
.003
.050 to .052 .015 to .023 22 to 32 .002 to .005 .093 to .098 .138 to .143 .205 to .210 .005 to .015
-102 to  -178 .103 +/-
.003
.081 to .083 .017 to .025 17 to 24 .002 to .005 .140 to .145 .171 to .176 .238 to .243 .005 to .015
-201 to  -284 .139 +/-
.004
.111 to .113 .022 to .032 16 to 23 .003 to .006 .187 to .192 .208 to .213 .275 to .280 .010 to .025
-309 to  -395 .210 +/-
.005
.170 to .173 .032 to .045 15 to 21 .003 to .006 .281 to .286 .311 to .316 .410 to .415 .020 to .035
-425 to  -475 .275 +/-
.006
.226 to .229 .040 to .055 15 to 20 .004 to .007 .375 to .380 .408 to .413 .538 to .543 .020 to .035

CS Cross Section    DC Diametral Clearance    BR Backup Rings Measurements in inches




Industrial Reciprocating (Dynamic) Glands [PDF]
Gland Dimensions Industrial Reciprocating Seal

    Gland Squeeze   Groove Width Groove  
AS568B CS Depth Inches % DC 0 BR 1 BR 2 BR 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
-425 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

CS Cross Section    DC Diametral Clearance    BR Backup Rings Measurements in inches