This Standard Practice establishes material@ surface finish@ dimensional@ and testing requirements for preformed V-ring packing sets@ packing chambers@ and valve stems. This Standard Practice applies to homogeneous elastomeric and polytetrafluoroethylene (PTFE) V-ring packing for gray iron and ductile iron quarter-turn and multi-turn valves for waterworks applications with a maximum service temperature of 150 ??(66 ??.