Imperial O-Rings 2 3/16 Bore - 6 3/4 Bore by Moore International

The O-Ring range is vast, starting from BS001 (0.029ins bore, 0.040 cross section) right through to BS475, (25.94 ins bore, 0.275 cross section).Available in nitrile, viton, EPDM, silicone, food quality nitrile, PTFE and even encapsulated. Encapsulated are normally made from silicone or viton, and have a seamless FEP coating wich can help in chen=mical and extreme conditions.

As well as the British standard range, we also stock sizes from the German/Swedish European range of sizes. PTFE back up rings can also be sourced to suit most O-Ring sizes. To add to the already massive range of O-Rings stocked, a range of O-Ring cord is available with suitable adhesives for joining. Where the O-Ring is of a very large diameter, a scarf jointing/vulcanising service can be utilised.

Based around similar sizes to British Standard O-Rings, these are particularly useful in high dynamic applications or low friction applications, as they create lower friction than conventional O-Rings.

Please ask for your indivdual solution. Many styles and materials are available.

ID	Nominal Selection					Materials include: FEP Encapsulated = Its temperature range is -20°C to +204°C, An encapsulated O-ring comprises an elastomer energising centre, which has a seamless jacket made from fluoropolymer. EPDM = This has very good resistance to weathering, o-zone, water and steam. Also it has low and high temperature capability, which is excellent, having good resistance to set with good elasticity. High Nitrile (75°/90° Shore) = Neoprene = This has outstanding resistance to weathering and ageing, this makes neoprene good for outdoor applications, also its high and low temperatures are good and its elasticity and scratch resistance is of good standard. Nitrile Rubber = this is split into 3 categories - high, medium and low nitrile, this all depends on the proportion of acrylonitrile in the polymer. The substance can vary, 18% - 45% approx. this affects the properties; acrylonitrile is the oil resistant component of the copolymer. PTFE = The temperature range is from -195°c - +250°c, P.T.F.E. is an extremely inert material and is untouched by practically every known chemical together with nearly all acids, alkalis and solvents. These properties make it an ideal substance for O-ring Back up Rings. Its cold flow properties under constant strain are generally a disadvantage in P.T.F.E. O-Rings; for example, it has to small a memory to go back to its original shape. Silicone (Red/White/Black) = Its temperature range is from -65°C to +250°c, Silicone has unfortunate tensile strength, tear and scratch resistance, however it has brilliant resistance to extreme temperatures. Its retention of characteristics at high temperatures is superior to other elastic materials. Viton = This is good for high temperatures and has excellent resistance against hydraulic oils, petrol and many other chemicals, as well as weathering and o-zone conditions. WRC Approved Materia = Water potable approved.
	1/16	3/32	1/8	3/16	1/4
	Actual Size
	(1.78)	(2.62)	(3.53)	(5.33)	(7.00)
	BS Number
2 3/16		139
2 1/4	035	140	228	331
2 5/16		141
2 3/8	036	142	229	332
2 7/16		143
2 1/2	037	144	230	333
2 9/16		145
2 5/8	038	146	231	334
2 11/16		147
2 3/4	039	148	232	335
2 13/16		149
2 7/8	040	150	233	336
3	041	151	234	337
3 1/8			235	338
3 1/4	042	152	236	339
3 3/8			237	340
3 1/2	043	153	2383	341
3 5/8			239	342
3 3/4	044	154	240	343
3 7/8			241	344
4	045	155	242	345
4 1/8			243	346
4 1/4	046	156	244	347
4 3/8			245	348
4 1/2	047	157	246	349	425
4 5/8			247	350	426
4 3/4	048	158	248	351	427
4 7/8			249	352	428
5	049	159	250	353	429
5 1/8			251	354	430
5 1/4	050	160	252	355	431
5 3/8			253	356	432
5 1/2		161	254	357	433
5 5/8			255	358	434
5 3/4		162	256	359	435
5 7/8			257	360	436
6		163	258	361	437
6 1/4		164	259	362	438
6 1/2		165	260	363	439
6 3/4		166	261	364	440