Gaskets,Packings, & Seals Inc. 
P.O. Box 509 
Parkersburg, WV 26102 
Tel: 304-422-3880 Fax: 304-422-9476

Standard Spiral Wound Inner Ring Dimensions

This chart depicts the inside diameter of the inner ring for standard spiral wounds


Nom. Size   150# 300# 400# 600# 900# 1500# 2500#
                 
1/2   0.56 0.56 0.56 0.56 0.56 0.56 0.56
3/4   0.81 0.81 0.81 0.81 0.81 0.81 0.81
1   1.6 1.06 1.06 1.06 1.06 1.06 1.06
1 1/4   1.5 1.5 1.5 1.5 1.31 1.31 1.31
1 1/2   1.75 1.75 1.75 1.75 1.63 1.63 1.63
2   2.19 2.19 2.19 2.19 2.06 2.06 2.06
2 1/2   2.62 2.62 2.62 2.62 2.5 2.5 2.5
3   3.19 3.19 3.19 3.19 3.19 3.19 3.19
4   4.19 4.19 4.19 4.19 4.19 4.19 4.19
5   5.19 5.19 5.19 5.19 5.19 5.19 5.19
6   6.19 6.19 6.19 6.19 6.19 6.19 6.19
8   8.5 8.5 8.25 8.25 8.25 8.12 7.88
10   10.56 10.56 10.25 10.25 10.25 10.15 9.75
12   12.5 12.5 12.5 12.5 12.38 12.38 11.5
14   13.75 13.75 13.75 13.75 13.5 13.38 N/A
16   15.75 15.75 15.75 15.75 15.5 15.25 N/A
18   17.69 17.69 17.69 17.69 17.5 17.25 N/A
20   19.69 19.69 19.69 19.69 19.5 19.25 N/A
24   23.75 23.75 23.75 23.75 23.75 22.75 N/A




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