Seal Details

Type: 20H

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Single spring, resilient, rubber diaphragm seal featuring a Type 20 rotary with an ‘O’-Ring mounted Type 21 stationary seat option, to suit common UK housing sizes.

A very widely specified and utilised seal type, highly suited to diverse duties, and capable of long service life.

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Imperial Dimensions

Size
Code

0.375	0095	24.6	21.8	25.4	8.74
0.5	0127	27.79	23.5	25.4	8.74
0.625	0158	30.95	27	25.4	10.32
0.75	0191	34.15	30.7	25.4	10.32
0.875	0222	37.3	33.4	25.4	10.32
1	0254	40.5	43.2	25.4	10.32
1.125	0286	47.63	45.6	33.34	11.99
1.25	0317	50.8	47.4	33.34	11.99
1.375	0349	53.98	52	33.34	11.99
1.5	0381	57.15	55.6	33.34	11.99
1.625	0412	60.33	59.2	33.34	11.99
1.75	0444	63.5	65.1	40.48	11.99
1.875	0476	66.68	66.7	40.48	11.99
2	0508	69.85	73.3	40.48	13.5
2.125	0539	73.03	73.3	40.48	13.5
2.25	0571	76.2	78.6	40.48	13.5
2.375	0603	79.38	82.1	40.48	13.5
2.5	0635	82.55	84.6	40.48	13.5
2.625	0666	92.08	88.6	49.21	15.88
2.75	0698	95.25	90	49.21	15.88
2.875	0730	98.43	95.2	52.39	15.88
3	0762	101.6	102.7	52.39	15.88
3.125	0794	111.15	104	55.56	19.88
3.250	0825	114.3	104	55.56	19.88
3.375	0857	117.48	108	55.56	19.88
3.500	0889	120.65	112	55.56	19.88
3.625	0921	123.83	114	58.74	19.88
3.750	0953	127	119	58.74	19.88
3.875	0984	130.2	121	61.91	19.88
4.000	1016	133.35	124	61.91	19.88