... PUMPMATERIALPARTSMATERIALSTANDARD CODEBearing SupportTray (Double Volote Pump )Casing,Casing Cover HT200GB9439-88QT405-10,QT500-7GB1348-88ZG230- ... Liner,Guard Plate, (Single Volote Pump )Casing,Casing Cover Wear resistent 1#-8#GB8263-87ExpellerDischarge ... Volite casing pump (Double metal structure or outer metal casing,rubber linning ) and single volute casing pump (single casing,metal structure) ...