Maximum Radial Clearance Gap to Prevent Extrusion
Clearances apply to dynamic O-Rings with no backup washers
for .139 inch (3.53mm) O-Ring cross-sections and up. Smaller
cross-sections do not give effective moving seal life, are
less resistant to extrusion, and may be critical in sealing
high frequency dynamic motion.
Mechanical SQUEEZE for this type of seal is
determined by the groove diameter dimension (D) and the tube
diameter dimension (C). When these tube dimensions and the
gland depth dimensions are known, then the groove diameter can
be determined by the following formula:
D max. = C min. plus 2F max.
D min. = C max. plus 2F