This 1 Inch Isolation Pump Flange Is Designed To Isolate Circulator Pumps To Facilitate Circulator Pump Replacement Or Repairs. It Features A Brass Body And Flange With Bottom Loaded Blowout Proof Stem, Buna-N Stem O-Ring Seal, Virgin PTFE Seat, And Optional T-Handle Included. The Pressure Is Rated 600 PSI (41.4 BAR) WOG And The Maximum Temperature Is 406 F (208 C) At 100 PSI (6.9 BAR).