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PAI Kurv-Bak™ hard rubber back-up rings can be made in a variety of materials to help prevent early seal failure at higher pressures.
Kurv-Baks
Unit of Measure
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Item #

Nominal C/S (inches)

Nominal I.D. (inches)

Nominal O.D. (inches)

Thickness (Inches)

I.D. (inches)

O.D. (Inches)

888-223 N/A 1/8 N/A 1 5/8 N/A 1 7/8 N/A .050 N/A 1.647 N/A 1.883
888-224 N/A 1/8 N/A 1 3/4 N/A 2 N/A .050 N/A 1.772 N/A 2.008
888-225 N/A 1/8 N/A 1 7/8 N/A 2 1/8 N/A .050 N/A 1.897 N/A 2.133
888-226 N/A 1/8 N/A 2 N/A 2 1/4 N/A .050 N/A 2.022 N/A 2.258
888-227 N/A 1/8 N/A 2 1/8 N/A 2 3/8 N/A .050 N/A 2.147 N/A 2.383
888-228 N/A 1/8 N/A 2 1/4 N/A 2 1/2 N/A .050 N/A 2.272 N/A 2.508
888-229 N/A 1/8 N/A 2 3/8 N/A 2 5/8 N/A .050 N/A 2.397 N/A 2.633
888-230 N/A 1/8 N/A 2 1/2 N/A 2 3/4 N/A .050 N/A 2.522 N/A 2.758
888-231 N/A 1/8 N/A 2 5/8 N/A 2 7/8 N/A .050 N/A 2.631 N/A 2.867
888-232 N/A 1/8 N/A 2 3/4 N/A 3 N/A .050 N/A 2.756 N/A 2.992
888-233 N/A 1/8 N/A 2 7/8 N/A 3 1/8 N/A .050 N/A 2.881 N/A 3.117
888-234 N/A 1/8 N/A 3 N/A 3 1/4 N/A .050 N/A 3.006 N/A 3.242
888-235 N/A 1/8 N/A 3 1/8 N/A 3 3/8 N/A .050 N/A 3.131 N/A 3.367
888-236 N/A 1/8 N/A 3 1/4 N/A 3 1/2 N/A .050 N/A 3.256 N/A 3.492
888-237 N/A 1/8 N/A 3 3/8 N/A 3 5/8 N/A .050 N/A 3.381 N/A 3.617
888-238 N/A 1/8 N/A 3 1/2 N/A 3 3/4 N/A .050 N/A 3.506 N/A 3.742
888-239 N/A 1/8 N/A 3 5/8 N/A 3 7/8 N/A .050 N/A 3.631 N/A 3.867
888-240 N/A 1/8 N/A 3 3/4 N/A 4 N/A .050 N/A 3.756 N/A 3.992
888-241 N/A 1/8 N/A 3 7/8 N/A 4 1/8 N/A .050 N/A 3.881 N/A 4.117
888-242 N/A 1/8 N/A 4 N/A 4 1/4 N/A .050 N/A 4.006 N/A 4.242
888-243 N/A 1/8 N/A 4 1/8 N/A 4 3/8 N/A .050 N/A 4.131 N/A 4.367
888-244 N/A 1/8 N/A 4 1/4 N/A 4 1/2 N/A .050 N/A 4.256 N/A 4.492
888-245 N/A 1/8 N/A 4 3/8 N/A 4 5/8 N/A .050 N/A 4.381 N/A 4.617
888-247 N/A 1/8 N/A 4 5/8 N/A 4 7/8 N/A .050 N/A 4.631 N/A 4.867
888-248 N/A 1/8 N/A 4 3/4 N/A 5 N/A .050 N/A 4.768 N/A 5.004
Unit of Measure
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