Zawory zwrotne metal-metal
Cast iron, stainless steel, bronze, brass or different materials+- 802 - Heating, industrial process
 - 802L - Heating, industrial applications
 - 802T - Heating, industrial applications
 - 802Z - Corrosive, high temperature
 - 812 - Industry, corrosives , high pressure and high temperature
 - 812X - Industry, chemicals , high pressure and high temperature steam service
 - 812XB - Industry, process liquids, steam service
 - 812XL - Industry, process liquids, high pressure and temperature, steam service
 - 812XS - Industry, process liquids, steam service
 - 812XT - Industrie, process liquids, steam service