O-Rings & Materials
All British standard sizes plus a wide range of non-standard sizes.
We supply O-rings in many different materials and shore hardness. FDA and WRAS approved materials are also available.
Buna – Nitrile 70shore (Standard) 50shore, 60shore, 90shore
Ideal for use with Hydralic and lubricating oils, vegatable oils, water, alcohol and air. Very good mechanical properties. a versatile industry standard elastomer.
Fluorocarban (Viton) 75shore (standard) 50shore, 60shore, 90shore
Able to withstand high temperatures (-15° to +205°), hydrailc fluid and certain chemicals, oxidising liquids, acids and hot air. Viton is a quality elastomer and can perform well in high vacuum applications.
Ethylene-propylene 70shore (Standard)
Good chemical resistance and excellent ozone and weathering resistance. Perform to a high standard when exposed to mild acids, heated water and high temperatures of steam. (Temp range -55° to +150°)
Silicone (White and Red) 70shore (standard) 50shore, 60shore FDA APPROVED
Excellent for high and low temperatures (-60° to +230°) Good resistance to Ozone and many chemicals. Silicone is also known for its very good electrical properties.
Fluorosilicone (Blue) 60shore (standard)
Has temperature range similar to standard silicone with improved fuel and chemical resistance. Fluorosilicone is also known for its flexibility when exposed to low temperatures and ozone weathering.
PTFE (Polytetrafluoroethylene)
This material is resistant to a wide range of chemicals and has an impressive temperature range. (_120° to +260°)
| NBR | EPDM | NEOPRENE | SILICONE | FLUORO - SILICONE | FKM - Viton | FFKM | TEFLEX | |
|---|---|---|---|---|---|---|---|---|
| ASTM CODE 1992 IS0 CODE 1987 HARDNESS SHORE A TENSILE STRENGTH (psi) TEARING STRENGTH WEAR RESISTANCE | NBR NBR 40-95 2500 G G | EPDM EPM 40-80 2500 G G | CR CR 20-90 3000 VG G | VMQ VMQ 10-90 1400 N N | FVMQ FVMQ 40-80 900 N N | FKM FPM 60-90 2000 G G | FFKM FFPM 80-90 2000 G G | FEP FEP 80-90 G G |
| FIRE PROOF HYD. FLUIDS LUBRICATING OILS FUEL OILS HYDRAULIC OILS VEGETABLE OILS ANIMAL FATS | N G G E E E | VG N N N R R | R G R G G G | G G R G G G | VG E E E E E | R-N E E E E E | E E E E E E | E E E E E E |
| PETROL (NORMAL) PETROL (HIGH OCTANE) KEROSENE AROMATIC HYDROCARBONS ALIPHATIC HYDROCARBONS | VG G VG R VG | N N N N N | R N R N G | R N R N R | E E E E E | E E E E E | E E E E E | E E E E E |
| WATER (UNDER 80°C) WATER (ABOVE 80°C) ALCOHOLS KETONES CONC. ACIDS DILUTED ACIDS ALKALIS CHLORINATED SOLVENTS | VG R VG N N R R R | E E E G R G VG N | R N E N N G G N | E E E G R G G N | E VG E N G VG R E | E G E N VG E G E | E E E E E E E E | E E E E E E E E |
| OZONE & SUNLIGHT MAX.TEMP AT CONTINUOUS SERVICE ELECTRICAL PROPERTIES | R 110°C N | E 135°C E | VG 105°C VG | E 230°C E | E 205°C E | E 205°C E | E 250°C316°C E | E 204°C 260°C E |
| COMPRESSION SET | VG | G | VG | E | VG | R | G | G |
| FLAME RESISTANT | NO | NO | YES | NO | NO | YES | YES | YES |
| E = Excellent | VG = Very Good | G = Good | R = Reasonable | N = Not Recommended |