valve case
we can produce ,valve body,valve case,by ductile iron casting,grey casting,some of the parts serve pipe system,
the grade can be HT200-HT400,QT400-QT700 ,malleable cast iron,nodular iron,spheroidal graphite cast
iron,
some of the casting need to be heat treatment to get a good mechanical strength.
there are many foundry in Ningbo,most them equipped the inspect machine,such as spectrometer,
tensile machine,impact machine,etc.
we can provide the machining process for these casting parts,