General Description The Tyco® 2 thru 8 inch (DN50 thru DN200) Model PRV-1 Pressure Re-ducing Valves are factory assembled and fully trimmed valve arrangements for pressure control. They are used on water filled pipe where it is necessary to reduce a higher inlet pressure to a lower delivery pressure under static and/or residual flowing conditions. The PRV-1 is intended to automatically maintain the outlet “set pressure” (static and residual) within a close range, regardless of fluctuations in the higher pressure inlet line or varyingflow rates. The PRV-1 is provided with a factory outlet “set pressure” of 125 psi (8,6 bar); however it may be field set to a nominal outlet “set pressure” of 80 to 225 psi (5,5 to 15,5 bar) per its FM Approval or 80 to 150 psi (5,5 to 10,3 bar) per its UL Listing