Seal Details
Type: A1
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Robust, long working length, highly accommodating and reliable, rubber diaphragm balanced seal, which provides enhanced seal capability, performance and life. The Type A1 has a retainer backing plate, a narrow profile and a no spring base plate.
Improved design features further enhance this popular seal. Available with a Type 20 boot-mounted seat as standard, suitable for originally common UK housing dimensions.
Metric Dimensions
| D0 | Size Code | D1 | D3 | L1 | L2 |
| 12 | 0120 | 27.79 | 23.9 | 43.66 | 8.74 |
| 14 | 0140 | 30.95 | 27.07 | 43.66 | 10.32 |
| 16 | 0160 | 30.95 | 27.07 | 43.66 | 10.32 |
| 18 | 0180 | 34.15 | 30.25 | 43.66 | 10.32 |
| 19 | 0191 | 34.15 | 30.25 | 43.66 | 10.32 |
| 20 | 0200 | 35.7 | 33.42 | 43.66 | 10.32 |
| 22 | 0220 | 37.3 | 33.42 | 43.66 | 10.32 |
| 24 | 0240 | 40.5 | 38.1 | 43.66 | 10.32 |
| 25 | 0250 | 40.5 | 38.1 | 43.66 | 10.32 |
| 28 | 0280 | 47.63 | 41.28 | 60.33 | 11.99 |
| 30 | 0300 | 50.8 | 46 | 60.33 | 11.99 |
| 32 | 0320 | 50.8 | 46 | 60.33 | 11.99 |
| 33 | 0330 | 53.98 | 48.68 | 60.33 | 11.99 |
| 35 | 0350 | 53.98 | 48.68 | 60.33 | 11.99 |
| 38 | 0380 | 57.15 | 51.85 | 60.33 | 11.99 |
| 40 | 0400 | 60.33 | 58.1 | 60.33 | 11.99 |
| 43 | 0430 | 63.5 | 61.67 | 70.64 | 11.99 |
| 45 | 0450 | 63.5 | 61.67 | 70.64 | 11.99 |
| 48 | 0480 | 66.68 | 64.84 | 70.64 | 11.99 |
| 50 | 0500 | 69.85 | 68.01 | 70.64 | 13.5 |
| 53 | 0530 | 73.03 | 72.02 | 70.64 | 13.5 |
| 55 | 0550 | 76.2 | 75.3 | 70.64 | 13.5 |
| 60 | 0600 | 79.38 | 78.37 | 70.64 | 13.5 |
| 63 | 0630 | 82.55 | 81.54 | 70.64 | 13.5 |
| 65 | 0650 | 92.08 | 86.22 | 69.85 | 15.88 |
| 70 | 0700 | 95.25 | 89.4 | 69.85 | 15.88 |
| 75 | 0750 | 101.6 | 95.75 | 73.03 | 15.88 |
Imperial Dimensions
| D0 | Size Code | D1 | D3 | L1 | L2 |
| 0.5 | 0127 | 27.79 | 23.9 | 43.66 | 8.74 |
| 0.625 | 0158 | 30.95 | 27.07 | 43.66 | 10.32 |
| 0.75 | 0191 | 34.15 | 30.25 | 43.66 | 10.32 |
| 0.875 | 0222 | 37.3 | 33.42 | 43.66 | 10.32 |
| 1 | 0254 | 40.5 | 38.1 | 43.66 | 10.32 |
| 1.125 | 0286 | 47.63 | 41.28 | 60.33 | 11.99 |
| 1.25 | 0317 | 50.8 | 46 | 60.33 | 11.99 |
| 1.375 | 0349 | 53.98 | 48.68 | 60.33 | 11.99 |
| 1.5 | 0381 | 57.15 | 51.85 | 60.33 | 11.99 |
| 1.625 | 0412 | 60.33 | 58.1 | 60.33 | 11.99 |
| 1.75 | 0444 | 63.5 | 61.67 | 70.64 | 11.99 |
| 1.875 | 0476 | 66.68 | 64.84 | 70.64 | 11.99 |
| 2 | 0508 | 69.85 | 68.01 | 70.64 | 13.5 |
| 2.125 | 0539 | 73.03 | 72.02 | 70.64 | 13.5 |
| 2.25 | 0571 | 76.2 | 75.3 | 70.64 | 13.5 |
| 2.375 | 0603 | 79.38 | 78.37 | 70.64 | 13.5 |
| 2.5 | 0635 | 82.55 | 81.54 | 70.64 | 13.5 |
| 2.625 | 0666 | 92.08 | 86.22 | 69.85 | 15.88 |
| 2.75 | 0698 | 95.25 | 89.4 | 69.85 | 15.88 |
| 2.875 | 0730 | 98.43 | 92.57 | 73.03 | 15.88 |
| 3 | 0762 | 101.6 | 95.75 | 73.03 | 15.88 |