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.
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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)

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N/A 3/16 N/A 8 1/4 N/A 8 5/8 N/A .076 N/A 8.278 N/A 8.644
N/A 1/8 N/A 8 1/4 N/A 8 1/2 N/A .050 N/A 8.268 N/A 8.504
N/A 1/4 N/A 8 N/A 8 1/2 N/A .117 N/A 8.024 N/A 8.496
N/A 3/16 N/A 8 N/A 8 3/8 N/A .076 N/A 8.028 N/A 8.394
N/A 1/8 N/A 8 N/A 8 1/4 N/A .050 N/A 8.018 N/A 8.254
N/A 1/4 N/A 7 3/4 N/A 8 1/4 N/A .117 N/A 7.774 N/A 8.246
N/A 1/8 N/A 7 3/4 N/A 8 N/A .050 N/A 7.768 N/A 8.004
N/A 1/4 N/A 7 1/2 N/A 8 N/A .117 N/A 7.524 N/A 7.996
N/A 3/16 N/A 7 1/2 N/A 7 7/8 N/A .076 N/A 7.528 N/A 7.894
N/A 1/8 N/A 7 1/2 N/A 7 3/4 N/A .050 N/A 7.518 N/A 7.754
N/A 1/4 N/A 7 1/4 N/A 7 3/4 N/A .117 N/A 7.274 N/A 7.746
N/A 1/8 N/A 7 1/4 N/A 7 1/2 N/A .050 N/A 7.268 N/A 7.504
N/A 1/4 N/A 7 N/A 7 1/2 N/A .117 N/A 7.024 N/A 7.496
N/A 3/32 N/A 7 1/4 N/A 7 7/16 N/A .053 N/A 7.268 N/A 7.440
N/A 3/16 N/A 7 N/A 7 3/8 N/A .076 N/A 7.028 N/A 7.394
N/A 1/8 N/A 7 N/A 7 1/4 N/A .050 N/A 7.018 N/A 7.254
N/A 1/4 N/A 6 3/4 N/A 7 1/4 N/A .117 N/A 6.774 N/A 7.246
N/A 3/32 N/A 7 N/A 7 3/16 N/A .053 N/A 7.018 N/A 7.190
N/A 3/16 N/A 6 3/4 N/A 7 1/8 N/A .076 N/A 6.778 N/A 7.144
N/A 1/8 N/A 6 3/4 N/A 7 N/A .050 N/A 6.768 N/A 7.004
N/A 1/4 N/A 6 1/2 N/A 7 N/A .117 N/A 6.524 N/A 6.996
N/A 3/32 N/A 6 3/4 N/A 6 15/16 N/A .053 N/A 6.768 N/A 6.940
N/A 1/8 N/A 6 1/2 N/A 6 3/4 N/A .050 N/A 6.518 N/A 6.754
N/A 1/4 N/A 6 1/4 N/A 6 3/4 N/A .117 N/A 6.274 N/A 6.746
N/A 3/16 N/A 6 1/4 N/A 6 5/8 N/A .076 N/A 6.278 N/A 6.644
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