Liquid nitrogen Ultra High Purity Valves Key Benefits All of the PFA Teflon components are manufactured in a high purity, controlled environment Metal components machining, PFA... Teflon molding, valve assembly and testing all at the same site ensuring ultra high purity of the final product High purity cleaning and packaging capabilities inside the specially... and packaged under Class 100 HEPA filtered air High purity material significantly reduces rinse-up time in ultra-pure water applications Maintains chemical purity when used in chemical...