ASME Y14.40.8 pdf download GRAPHICALSYMBOLS FORDIAGRAMS, PART8: VALVES AND DAMPERS 1 sCOPE This Standard specifies graphical symbols for valvesand dampers in diagrams, including symbols for gen-eral-purpose valves, those used in fluid power systems,and hygienic valves used in the food and pharmaceuticalindustries. For the fundamental rules of creation and applicationof graphical symbols in diagrams, see ASME Y14.40.0.For an overview of the...