... -450,ZG270-500GB/T11352-89ImpellerVolute Liner,Guard Plate, (Single Volote Pump )Casing,Casing Cover Wear resistent 1#-8#GB8263-87ExpellerDischarge ... is ZJ series which is vertical axial single stage single suction centrifuge slurry pump,and the other is ZJL series which ... outer metal casing,rubber lining ) and single volute casing pump (single casing,metal structure)2, Pump outlet can be spaced by 45. ...