Series UPR Downstream pressure reducing valve features non-shutoff elastomer-free design (pressure will equalize in a no-flow condition) and the ultimate purity levels, as verified by independent test labs. BCF spigots, flare, sanitary, and other connection types available. 1/4″ – 2″ or 20 – 63mm sizes; choice of Kynar 740 or PTFE body. High purity CDB-16 (8 hour hot / 8 hour cold DI rinse) procedure is standard; clean and double bag in class 100 (ISO 5) clean room. Ultimate purity with excellent flow performance; set pressure range 5-100 PSI.