DESCRIPTION: Parker supplies o-rings made by compounds that have been approved by the UL, FDA, USDA, NSF 51, USP, and NSF61. These compounds have undergone and passed testing specific to these services' requirements.
Underwriters Laboratories (UL) approved compounds are compatible with several "household" fluids and gases. Such media include fire extinguishing agents, natural gas, laundry detergents, and gasoline, etc.
Compounds approved by the Food and Drug Administration (FDA) and the United States Department of Agriculture (USDA) have passed tests established for rubber compounding ingredients that declare these approved compounds and their accompanying compounding ingredients as neither toxic nor carcinogenic. These compounds also pass the necessary extraction requirements for food grade materials. Compounds approved by NSF 51 and the U.S. Pharmacopoeia (USP) meet requirements regarding food and beverage service. Especially for critical medical applications, USP Class VI approved materials pass requirements for system toxicity and intracutaneous toxicity and contain ingredients with clear histories of biocompatibility that meet tighter requirements for leachates. NSF 61approved compounds pass requirements specific to drinking water system components. This nationally recognized health effects standard acknowledges components, devices, and materials which contact drinking and potable water. Many of these materials are approved for use in the United Kingdom (WRAS) and Germany (KTW), in addition to
