NSF-Listed Compounds
Suppliers of drinking water systems know that access to markets throughout the world requires that their products be certified to NSF/ANSI Standard 61 (“NSF 61”). NSF 61 sets limits for the amount of chemicals permitted to leach into drinking water from the materials used in water transmission and distribution. Parco has more than fifteen years of experience providing seals that meet NSF 61.
Parco offers O-rings and custom molded seals in both sulfur-cured and peroxide-cured compounds, specially formulated to resist chloramines. Some of Parco’s NSF listed compounds also meet the Federal Drug Administration (FDA) requirements for food-handling. To quickly find the best NSF listed compound for your application, please see the table below.
NSF-Listed Compounds
| Elastomer | Compound | Durometer (Shore A) |
Color | Key Properties |
|---|---|---|---|---|
| Silicone | 1225-40 | 40 | Brick Red | Low cost; peroxide-cured |
| Silicone | 1229-60 | 60 | Brick Red | Low cost; peroxide-cured |
| Silicone | 1225-70 | 70 | Brick Red | Low cost; peroxide-cured |
| Nitrile | 4926-70 | 70 | Black | Low cost; sulfur-cured |
| Nitrile | 4926-80 | 80 | Black | Low cost; sulfur-cured |
| EPDM | 5778-50 | 50 | Black | Peroxide-cured; internally lubricated; FDA-conforming |
| EPDM | 5300-70 | 70 | Black | Low cost; peroxide-cured; FDA-conforming |
| EPDM | 5315-70 | 70 | Black | Low cost; sulfur-cured; FDA-conforming |
| EPDM | 5323-70 | 70 | Black | Low cost; peroxide-cured |
| EPDM | 5325-70 | 70 | Black | Low cost; peroxide-cured; FDA-conforming; WRAS |
| EPDM | 5778-70 | 70 | Black | Peroxide-cured; internally lubricated; FDA-conforming |
| EPDM | 5315-80 | 80 | Black | Low cost; sulfur-cured |
| EPDM | 5778-80 | 80 | Black | Peroxide-cured; internally lubricated; FDA-conforming |
| EPDM | 5778-90 | 90 | Black | Peroxide-cured; internally lubricated; FDA-conforming |