"One-to-Two or One-to-Four" Separate hopper loaders are designed and developed on the basis of original European separate-vacuum hopper Loaders. They feature more functions, easy to operate, and convenient to install. This model, equipped with a high pressure blower and four SHR-U-S type European central vacuum hoppers, is applicable to four dehumidifying and drying machines (dehumidifying dryer "SDD") or one gravimetric blender "SGB" to process plastic materials. Besides that , it can also realize the "One-to-Two or One-to-Four" way of conveying materials to different moulding machines or hoppers to greatly lower the cost.