AS# 004-
-475

AS568 -004 through -475 Dovetail Seal Design Guidelines
AS- 568 DASH #	W O-RING CROSS SECTION				G GROOZE WIDTH				H GROOVE DEPTH		R1 RADIUS		R RADIUS
	W O-RING CROSS SECTION				SHARPEDGE		ROUNDEDEDGE		Inch +.000 -.002	Millimeters +.000 - .050	R1 RADIUS		R RADIUS
	in.	+/-	mm	+/-	In..002	mm.05	In..002	mm .05	Inch +.000 -.002	Millimeters +.000 - .050	In.	mm	In.	mm
-004 to -050	0.07	0.003	1.78	0.08	0.057	1.45	0.063	1.6	0.052	1.32	0.005	0.13	1/64	0.4
-102 to -178	0.103	0.003	2.62	0.08	0.085	2.16	0.09	2.29	0.083	2.11	0.01	0.25	1/64	0.4
-201 to -284	0.139	0.004	3.53	0.1	0.115	2.92	0.12	3.05	0.115	2.92	0.01	0.25	1/32	0.79
-309 to -395	0.21	0.005	5.33	0.13	0.16	4.06	0.17	4.32	0.18	4.57	0.015	0.38	1/32	0.79
-425 to -475	0.275	0.006	6.99	0.15	0.22	5.59	0.235	5.97	0.234	5.94	0.015	0.38	1/16	1.59

Dovetail O-Ring Gland (Groove) Design

In a dovetail o-ring gland application the o-ring squeeze is primarily axial in direction, where a valve exerts force on the top and bottom of the o-rings surfaces. Typically used in static or slow moving applications the dovetail o-rings gland purpose is to properly hold the o-ring in place during machine operation. The table below lists recommended dimensions for dovetail seal glands by AS-568A o-ring dash numbers.

Static Radial Glands

Axial Internal Pressure

Axial External Pressure

Dynamic Rotary Glands

Dynamic Reciprocating

Static Crush Glands

Dovetail Glands

Gland Design Home

Dovetail O-Ring Gland Design

In a dovetail o-ring gland application the o-ring squeeze is primarily axial in direction, where a valve exerts force on the top and bottom of the o-rings surfaces. Typically used in static or slow moving applications the dovetail o-rings gland purpose is to properly hold the o-ring in place during machine operation. The table below lists recommended dimensions for dovetail seal glands by AS-568A o-ring dash numbers. There are a number of factors that should be carefully considered when designing the gland for a static crush o-ring application. The table below provides a standard set of guidelines to assist you in your design.

-The elastomer selection should directly correlate with the type of application in which the o-ring seal will be used. You can review our materials/elastomer section to examine the primary qualities of the material type under consideration.

Due to the number of interacting forces, it is STRONGLY RECOMMENDED THAT YOUR ELASTOMER SELECTION BE RIGOROUSLY TESTED IN THE ACTUAL APPLICATION, performance assumptions must be checked so that you are certain that all variables have been carefully considered.

Dynamic Radial Glands