EPDM O-Rings
EPDM O-Rings
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.
EPDM compounds are frequently used with foods, water and steam applications and offer the best resistance to ozone and weathering. EPDM’s are not used with petroleum oils or fuels because significant swelling would result.
Rubbers with saturated polymer backbones, such as EPDM, have much better resistance to heat, light and ozone than unsaturated rubbers such as natural rubber, SBR or polychloroprene (Neoprene). As such, EPDM can be formulated to be resistant to temperatures as high as 150 °C, and, properly formulated, can be used outside for many years or decades without degradation.
EPDM has good low temperature properties, with elastic properties to temperatures as low as -40 °C depending on the grade and the formulation.
O-ring applications can be very demanding. GFS Engineers are available to consult on any O-ring application. Click here to contact a GFS Engineer.
Materials
EPDM 70A
70A Durometer EPDM O-rings are offered in a variety of import and domestic compounds. Materials in this category available for purchase include GFS GE70 Black, and Parco 5600-70.
EPDM 90A
90A Durometer EPDM O-rings are offered in a variety of import and domestic compounds. Materials in this category available for purchase include GFS GE90 Black, and Parker E0962-90.
NSF 61
NSF 61 is a certification covering specific materials or products that come into contact with: drinking water, drinking water treatment chemicals, or both. Materials in this category available for purchase include Parker E1244-70, E3609-70 and Parco 5323-70, and 5778-70.
FDA
GFS offers EPDM materials that are FDA certified. These materials include Parker E3609-70, and Parco 5601-70 and 5778-70.
USP Class VI
There are several classes of USP, class VI being the highest grade and suitable for implantation in the human body with a test temperature of 121°C. Materials in the category available for purchase include Parker E3609-70.
