Seal Details
Type: U11
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Single spring, rubber diaphragm seal, similar to Type 11/22, but with reduced O.D. (D3) to give full ANSI seal chamber compatibility.
Type U11/U22 has a retainer lug driven face, as per our Type 24 design that is supplied in all sizes above 2.000” / 50 mm.
Type N11/N22, with a resilient elastomer mounted face, is the preferred design supplied up to its design limit of 2.000” / 50 mm.
Also available as Types U11J/N11J or N11J/N22J with an ‘O’-Ring mounted seat.
Imperial Dimensions
| D0 | Size Code | D1 | D3 | L1 | L2 |
| 0.5 | 0127 | 1 | 0.898 | 0.812 | 0.312 |
| 0.625 | 0158 | 1.25 | 1.063 | 0.875 | 0.405 |
| 0.75 | 0191 | 1.375 | 1.197 | 0.875 | 0.405 |
| 0.875 | 0222 | 1.5 | 1.315 | 0.937 | 0.405 |
| 1 | 0254 | 1.625 | 1.547 | 1 | 0.437 |
| 1.125 | 0286 | 1.75 | 1.65 | 1.062 | 0.437 |
| 1.25 | 0317 | 1.875 | 1.787 | 1.062 | 0.437 |
| 1.375 | 0349 | 2 | 1.941 | 1.125 | 0.437 |
| 1.5 | 0381 | 2.125 | 2.067 | 1.125 | 0.437 |
| 1.625 | 0412 | 2.375 | 2.185 | 1.375 | 0.5 |
| 1.75 | 0444 | 2.5 | 2.402 | 1.375 | 0.5 |
| 1.875 | 0476 | 2.625 | 2.52 | 1.5 | 0.5 |
| 2 | 0508 | 2.75 | 2.587 | 1.5 | 0.5 |
| 2.125 | 0539 | 3 | 2.776 | 1.687 | 0.562 |
| 2.25 | 0571 | 3.125 | 3.15 | 1.687 | 0.562 |
| 2.375 | 0603 | 3.25 | 3.134 | 1.812 | 0.562 |
| 2.5 | 0635 | 3.375 | 3.209 | 1.812 | 0.562 |
| 2.625 | 0666 | 3.375 | 3.437 | 1.937 | 0.625 |
| 2.75 | 0698 | 3.5 | 3.543 | 1.937 | 0.625 |
| 3 | 0762 | 3.875 | 3.811 | 2.062 | 0.625 |
| 3.125 | 0794 | 4 | 4.094 | 2.187 | 0.783 |
| 3.25 | 0825 | 4.125 | 4.094 | 2.187 | 0.783 |
| 3.375 | 0857 | 4.25 | 4.252 | 2.187 | 0.783 |
| 3.5 | 0889 | 4.375 | 4.409 | 2.187 | 0.783 |
| 3.625 | 0921 | 4.5 | 4.488 | 2.312 | 0.783 |
| 3.75 | 0953 | 4.625 | 4.685 | 2.312 | 0.783 |
| 3.875 | 0984 | 4.75 | 4.764 | 2.312 | 0.783 |
| 4 | 1016 | 4.875 | 4.882 | 2.312 | 0.783 |