Products Transfer Bulk Bag Unloading Station
Bulk Bag Unloading Station Material Handling Rheo engineering

Bulk Bag Unloading Station

The Rheo Bulk Bag Unloading Station is a modular, GMP system that is designed to work with a wide range of containers and processes. This system utilizes the Rheo Ventilation Sleeve technology to provide a high-containment, dust free, and easy to clean transfer system. From high-force conditioning to integrated nitrogen inerting options, the modular design of this unloading station can be configured to address a wide range of process challenges.

Safety: Reliably empty bulk bags without operator intervention.

Containment: Achieve various levels of containment; from simply containing visible dust using local exhaust ventilation to creating a completely closed transfer system using a split cone valve.

Productivity: Multiple flow aid options are available based on specific product properties to prevent bridging and ratholing and to increase the flow rate.



Bulk Bag Unloading Station

See the Rheo Bulk Bag Unloading Station in action in this video!

How the Bulk Bag Unloading Station Works

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Additional features for the Rheo' Bulk Bag Unloading Station

Lifting Hoist

with powered trolley.

Stainless Steel Construction

Pneumatic Bag Tensioner

Customizable Transfer Hopper

High-Containment Transfer Module

using the Rheo Ventilation Sleeve Technology

Flow Aid Massaging System

High Force Conditioning System

Common Specifications [customized per application]

Load Capacity2,200 lbs [1,000 kg]
Material of Construction304 stainless steel frame structure, 316 stainless steel product contact surfaces
Surface FinishProduct Contact Area: 25 µin [0.64 µm] Ra with ground and polished welds
Non-Product Contact Area: 35 µin [0.89 µm] Ra with smooth welds as laid
UtilityAir Supply: 90 PSIF [6.2 bar], 8 SCFM [3.1 L/s] clean, compressed air
Electric: 120 VAC, 1 Phase, 60 Hz and 480 VAC, 3 Phase, 60 Hz
Pneumatic or Electric (Battery) Utility Options Available
Controlstouch-screen HMI with separate E-Stop and on/off switch
Hazardous Ratingconfigurable for use in Hazardous Locations: Class I Divisions 1 and 2 [ATEX Zones 1 and 2] or Class II Divisions 1 and 2 [ATEX Zones 21 and 22]


Rheo can configure the Bulk Bag Unloading Station to accommodate a wide variety of process equipment. Rheo specializes in excellence when it comes to craftsmanship and the GMP requirements of the pharmaceutical and specialty chemical industry. Rheo can supply this easy to configure package to integrate with your downstream process and can provide a turn-key system for quick on-site deployment.

Vacuum transfer for bulk material transfer - Rheo Bulk Bag Unloading Station

Vacuum Transfer

The Vacuum Transfer Module allows for the bulk bag to be unloaded into a vacuum transfer system that conveys the product downstream to the receiving vessel.

Gravity chute transfers bulk material from Bulk Bag Unloading Station

Gravity Chute

The Gravity Chute Module allows this system to be configured so that the bulk bag can unload directly into a receiving vessel on the floor below.

Rheo Bulk Bag Unloading Station with Disperser System to allow for mixing and transferring of bulk materials

Disperser System

The Disperser System allows the Bulk Bag to unload into a disperser system that can mix the product with a solution and pump it directly to, or recirculate through, the receiving vessel.

Rheo Bulk Bag Unloading Station with screw conveyor, allows the product to be fed into the receiving vessel

Screw Conveyor

The Screw Conveyor Module allows the system to be configured with a screw conveyor system that can be used to feed the product into the receiving vessel.

Docking Systems and Discharge Aids

Rheo can conduct material testing with materials to meet the containment requirements and to optimize product throughput by customizing docking systems and discharge aids.

Docking Systems

  • Automated Docking System with SoliValve® 250
  • Bag Clamp with Extraction and Pinch Valve

Discharge Aids

SoliValve 250

SoliValve® 250

The SoliValve® 250 is an improved version of a Cone Valve system. It allows fully automatic and contained handling of big bags, containers, and drums. The SoliValve® 250 doses the material vertically from the storage container, allowing re-closing of partially empty vessels and changing to another ingredient without the need to empty the dosing hopper. The SoliValve® 250 can achieve containment levels of less than 100µg/m³ and can reach a dosing accuracy of +/- 20g.


  • Control Interface: pushbutton controls, lift/lower of bulk bag, forward/aft of lifting trolley, lift/lower of bag tensioner system, on/off of rotary valve
  • Utilities: electric, compressed air, Nitrogen, dust extraction
  • Hoist Specifications: stainless steel clad GMP strap hoist on motorized trolley, options available for hazardous environments
  • Common Options: powered horizontal drive on lifting trolley, bag conditioning arms, rotary feed valve, vacuum hopper with fluidizer system, hazardous location configuration, WIP sprayball system, vacuum powered bag collapse system

Drawings and Specifications for Rheo Bulk Bag Unloading Station

Complementary Products

The mobile FIBC (flexible intermediate bulk container) lifter at Rheo provides a convenient way to transport and position FIBCs

Bulk Bag Lifter

GMP, ergonomic, and portable solution for lifting, transporting, and positioning FIBCs for discharge into vessel manways or other process equipment.

Rheo small container transfer station with vacuum conveyance.

Small Container Transfer Station

The Rheo Material Transfer Station can be used to transfer product from small containers, such as drums or bags, into your process. This portable workstation can be configured with a wide variety of containment options and can have an integrated weighing system.

Rheo air filtration unit HEPA filtration device

Air Filtration Unit

Local HEPA filtration device to serve Local Exhaust Ventilation (LEV) systems. The Air Filtration Unit is designed specifically for Rheo Ventilation Sleeves; it is also a good fit for any application with similar extraction utility requirements.


The design of the Rheo Bulk Bag Unloading Station allows full wash-down capabilities and access to all surfaces and components. With no sealed panels that could leak or collect water, the design ensures that all the cleaning solution will fully rinse from the frame.

All Rheo equipment is designed to be fully cleanable without leaking or collecting water

Rheo offers multiple surface finished for GMP compliance. See the options side by side.

Surface Finish

Rheo offers several different Surface Finish options to fit your application needs.

Visit our GMP Compliance page to learn more.