Series PRHU Downstream pressure reducing valve features metal ion-free EPDM large area rolling diaphragm, ultra-smooth operation and isolated spring control. BCF spigots in 1/2″ – 3″ or 20 – 90mm sizes; Kynar 740 body and Class 100 clean/double bag procedure standard. Provides highest flow with minimal pressure droop among high purity regulators; set pressure range 10-125 PSI.