"Selection item","Required duty or observed condition","Exact valve evidence and open issue"
"Valve location, function and operating states","",""
"Manufacturer, article number and manual revision","",""
"Operating mechanism and liquid-service suitability","",""
"Normal state and required failure response","",""
"Minimum inlet pressure, where specified","",""
"Required differential for opening and full opening","",""
"Maximum working pressure and applicable conditions","",""
"Upstream and downstream range for each operating state","",""
"Required flow and documented pressure loss","",""
"Fluid, temperature and sealing materials","",""
"Flow direction and permitted installation arrangement","",""
"Coil, supply and controller compatibility","",""
"Maintenance requirements and safe access","",""
"Supplier decision, conditions and reviewer","",""