... unloading device, roots blower or vacuum pump), Positive press pneumatic conveying machine (pressure pump, combination pump, Air compressor) and Electric control system ... , 20, 25, 30,35m. Productions:XS series bulk pneumatic ship unloading conveying equipment, it can suction the materials from ... system by your detail requires. (Single-Vacuum Pump) Bulk Materials Pneumatic Ship Unloading Machine