b'MULTI-WAY BALL VALVES - APPENDIXA P P E N D I X ATORQUESTABLE 1BODY & STEM NUT TORQUE REQUIREMENTS (NM) BV509A FLANGED BODY VALVES 150/300 CLASS PN10/16/25Valve Size Body Bolts - Torque Stem Nut - TorqueFirst Pass Final Pass15 1/2 11 35 1320 3/4 11 35 1325 1 11 40 1532 1 1/4 27 60 1740 1 1/2 27 60 1750 2 40 60 1765 2 1/2 40 75 1780 3 40 75 17100 4 45 85 17BODY STUD LUBRICATIONRe-tightening of body bolts (with system de-pressurised) and gland packing bolting is permissible, if leakage occurs in these areas.The use of copper-based Anti-seize grease for body and packing stud lubrication and molybdenum disulfide anti-seize grease for stem packing lubrication is recommended.Depending on the gasket type and model, tightness may vary. Over-tightening will increase valve seating torque.18 Flowturn - Installation, Operation and Maintenance Manual'