Bulk Bag Unloaders: Choosing The Right One For Your Business

Bulk bag unloading systems are available in three different frame configurations— Fork Loaded, Half Frame, Hoist and Trolley. It is essential to understand these different frame types and their utility before deciding which unloader to buy. This post includes brief descriptions of all the frames types to help you choose the right Bulk Bag Unloaders system for your business. 

 Type 1: Half Frame Bulk Bag Unloaders 

Half Frame unloaders are a convenient option for facilities with an already present I-beam or H-beam and a forklift available. Alternatively it can also be used with the forklift, thereby creating a simple cost effective discharging system. They offer economical, complete dust containment; It is convenient as there are no upper-frame components requiring lifting to place the bag. With a forklift or a hoist, the bag can be easily placed above the unit. 

Points to consider: It is essential to choose the location carefully while deciding to buy a half-frame unloader. The unit should be located just below the beam or hoist. Carefully consider the operator’s workflow and safety aspects. The operator should not be under the danger of getting stuck in congested spaces between the frame and lift; the operator should be safely able to untie the bag without the fear of being run over. 

Utility: Half frame unloaders use simple structure made to cut open the bags once the bag is placed on the bag pan and quickly dispense the material. Flow-Flexer equips the discharger with bag activators that shake out the bag’s contents periodically to loosen compacted material and promote material flow into the spout. 

Type 2: Fork Loaded Bulk Bag Unloaders

Fork loaded unloaders are full-frame design; the bag is placed on the lifting frame and lifted to position it over the discharge pan carefully. There is flexibility to adjust the upper frame as per the bag height. The design incorporates an untie box from where the operator can access the bag spout for untying. These frames top to bottom bag support, the lift loops come in handy while lifting the bulk bag. 

Points to consider: The most significant advantage of the fork loaded structure is that it is entirely supported and is cost-effective. The adjustable trolley frame can conveniently accommodate various bag sizes, including the Rigid Intermediate Bulk Containers (RIBC) with moderate design adjustments. However, it is imperative to make height considerations as the forklift mast will extend above the structure of the unloader while bagging the unloader. 

Utility: Fork loaded structures are the go to option in cases where the bag size does not vary. The unloaders are technologically designed to accommodate bags of different sizes. However, it may lead to more than half a day’s work loss as it is a time consuming process and may involve the use of additional cumbersome equipment.

Type 3: Hoist and Trolley Bulk Bag Unloaders 

Hoist and trolley frames incorporate all the features of the Forklift frame, additionally they also include traversing and lifting the hoist to successfully place the bag on the frame. The operator places the bag adaptor just above the frames; the operator is adequately trained to do so as this will require extending and lowering of the adopter. The bag is then placed into the pan and the operator then unties the bag and the material is ready for dispensing.

Points to Consider:The Hoist and trolley units are costly, and the beams are challenging to incorporate. The area in which the unloader is deployed could be prone to accidents and proper considerations should be made to avert the same. It may even be required to restrict movement happening in the area where the hoist and trolley operates. Third, height considerations need to be made as additional height is required to mount the I-Beam. 

Utility: In production units handling multi-sized FIBC, it is convenient to use hoist and trolley bulk bag unloading systems. It is also helpful in facilities that may not have an easily accessible forklift. 


Before investing in a bulk bag unloading system, it is crucial to consider the unloader’s utility aspect. One must take into consideration various factors like the cost, configuration, and application. It is also vital to keep in mind the ergonomic features and the flexibility options. 

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