DESCRIPTION
O-rings are the most common and cost-effective sealing elements available. They seal over a wide range of pressure, temperature and tolerance. They are an excellent option where space limitations are a concern. And with proper hardware design, o-rings can seal a wide range of pressures from low vacuum up to several thousand PSI. O-rings are available in a wide range of elastomers as well as PTFE.
Ethylene Propylene Rubber (EPR, EPDM): EPR copolymer ethylene propylene and ethylene-propylene-diene rubber (EPDM) terpolymer are particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol base.
EPR/EPDM o-rings are readily available in 70 and 90 durometer. Other durometers are available on request.
SEAL INFORMATION
Chemical Resistance:
- HOT WATER AND STEAM UP TO 300F WITH SPECIAL COMPOUNDS UP TO 500F
- GLYCOL BASED BRAKE FLUIDS (DOT 3 & 4) AND SILICONE-BASED BRAKE FLUIDS (DOT 5) UP TO 300F.
- MANY ORGANIC AND INORGANIC ACIDS.
- CLEANING AGENTS, SODIUM AND POTASSIUM ALKALIS.
- PHOSPHATE-ESTER BASED HYDRAULIC FLUIDS (HFD-R).
- SILICONE OIL AND GREASE.
- MANY POLAR SOLVENTS (ALCOHOLS, KETONES, ESTERS).
- OZONE, AGING AND WEATHER RESISTANT.
Not compatible with:
- MINERAL OIL PRODUCTS (OILS, GREASES AND FUELS)
Durometer (Shore A): 70
Temperature Range (F): -70 TO 302
Max Pressure (psi): 1,450 DEPENDING ON APPLICATION
Max Pressure (psi) WITH BACKUP RINGS: 5,000 DEPENDING ON APPLICATION
Max Speed (ft/sec): 1.5
Mating Surface Roughness - Ra (µin) - DYNAMIC: 16 MAX
Mating Surface Roughness - Ra (µin) - STATIC: 32 MAX
Part Number Definition (Inch): (AS568 3-DIGIT NUMBER)EPR70
Additional Part Number Definition (Inch): 4"ID X .210"CS = 345EPR70