Horizontal Lift Check Valve UV-51-W Product Standard : Horizontal Lift Check Valve Pressure /Class Rating : PN 16 Body Material Cum Standard : GM (BS:1400 LG2) Product Description: Screwed In Bonnet inside Screw, Non Rising Stem Integral Seat Trim : Cu Alloy End Detail : Screwed Female Threads To IS :554(Parallel) Test Pressure : B.T.B -24 Bar Hyd S.T.B � 17.6 Bar -Hyd