Face Seal Design Guide

'Face Seal' styled O-ring grooves are some of the most commonly used O-ring sealing configurations due to their simplicity and ease of assembly.

The purpose of the tables below are to serve as a design guide for Face Seal O-ring grooves using all AS568 O-ring sizes*.

* Please note that some AS568-0XX O-rings have atypical cross sections. Please see our General Groove Guide for more information, or feel free to get in touch with our engineers if you have any questions.

DASH # RANGE	O-RING CROSS SECTION	GLAND DEPTH (D)	SQUEEZE		GLAND WIDTH (W)		GLAND CORNER RADIUS
AS568	Nominal (in)	Nominal (in)	Actual (in)	Percent	Liquids (in)	Vacuum & Gases (in)	R1 (in)	R2 (in)
-004 through -050	0.070 ± 0.003	0.050 - 0.054	0.013 - 0.023	19 - 32	0.101 - 0.107	0.084 - 0.089	0.01	0.005
-102 through -178	0.103 ± 0.003	0.074 - 0.080	0.020 - 0.032	20 - 30	0.136 - 0.142	0.120 - 0.125	0.01	0.005
-201 through -284	0.139 ± 0.004	0.101 - 0.107	0.028 - 0.042	20 - 30	0.177 - 0.187	0.158 - 0.164	0.018	0.005
-309 through -395	0.210 ± 0.005	0.152 - 0.162	0.043 - 0.063	21 - 30	0.270 - 0.290	0.239 - 0.244	0.028	0.005
-425 through -475	0.275 ± 0.006	0.201 - 0.211	0.058 - 0.080	21 - 29	0.342 - 0.362	0.309 - 0.314	0.028	0.005

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