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Piston valves - Technical data
Material code (m.c.)
 
Primary criterion for the material code number is the basic material of the body and bonnet.
 
m.c. Body Bonnetl internal parts colour of body
III cast iron cast iron without copper alloy parts grey
VI spheroidal cast iron spheroidal cast iron without copper alloy parts green
VIII cast steel cast steel without copper alloy parts blue
Xc stainless steel stainless steel stainless steel polished, pickled