Venturi tube welder for filter bag cage, It is used to weld venturi tube to the top of filter cage. specification: Item Horizontal Venturi tube welder Type DW-80 Input voltage 380V or 220V Designing capacity 80 kva Power frequency 50 or 60Hz Working capacity 40kva Air pressure 0.6-0.8MPa Air flow 200L/min Insulated grade F weight Kg