T3 Loss-in-weight Bulk Bag Unloader

Overview

Processors around the world handle dry bulk powders and ingredients in bulk bags. At Spiroflow, we specialize in high containment bulk bag unloading and filling systems – offering the most comprehensive range of standard and custom bulk bag unloading equipment in the business.

Our T3 loss-in-weight bulk bag unloader allows you total control over the amount of product you wish to dispense from the bag. This can be varied for individually selected batch amounts, or fully interfaced with your plant process control for continuous batch production.

The T3 loss-in-weight bulk bag unloader incorporates all the proven features of our Universal T2 model, but the bag support dish is mounted on four load cells. This enables highly accurate weighing of your product as it is discharged from the bag. If necessary, the integral transfer conveyor can also be suspended from the weigh frame as shown opposite, to provide a totally self-contained discharge and loss-in-weight dispensing unit.

Features

HOW IT WORKS & BENEFITS

The T3 Loss-In-Weight Bulk Bag Unloader is used when unloading by weight.

This bulk bag unloader is of all welded construction with a bag support dish that will accommodate most bottom-spout bulk bags.  The bag spout passes through the middle of the dish where it can be accessed.  The bulk bag provides the seal against the support dish for a dust free seal.  Our exclusive design mounts the four (4) load cells & summing box high on the frame between the frame & support dish, out of the way of harm, water & dirt.  The bulk bag unloading system can be used with a number of options including our various controls options. The discharge of the chute is custom made to fit the application.

How It Works

Our T3 bulk bag unloaders are simple and easy to operate.  The basic sequence of operation is as follows.

  1. A bulk bag of product is fitted with the Bag Lifting Frame.
  2. The operator lifts the bulk bag into place with a forklift.
  3. The Lifting Frame sits on the Side Tensioning Frame.
  4. The weight of the bag compresses the springs & the bottom of the bulk bag rests on the Support Dish.
  5. With the weight of the bag safely supported, the operator can now freely access the bottom spout of the bag.
  6. The operator opens the access door & unties the bag spout.
  7. As the bulk bag empties, the springs in the side frame will keep a constant tension on the bag ensuring complete emptying of its contents.
  8. Material falls into the chute & the integral conveyor moves material to the next step in your process.
  9. When empty the operator reties the bottom bag spout & removes the bag & lifting frame.

Features

  • Batch or continuous weight control – load cells are located at the mid-section, preventing the risk of damage by forklifts and dirt/debris when located at the base of the unit.
  • Recipe management system
  • Bag tensioner ensures complete emptying of bag
  • Integral conveyor or feeder
  • Full dust control
  • Designed to discharge poor flowing materials
  • Suitable for all bulk bag types and sizes up to 6.5 ft (2 m) high and 2 tons (1.8 tonnes) in weight

The bag is lifted by forklift on to the robust bulk bag support frame. Spring loaded arms on the support frame gradually raise and tension the bag during discharge. This ensures that the bag is completely emptied and prevents the bag spout or liner from sagging or fouling the take-off conveyor.

The loops of the bag are attached to a bag lifting frame and the liner (if any) clamped.

Integral chute has an access door for easy bag untying. Patented spout closure bars ensure the bag remains tightly closed until the discharging process starts.

The bag is lifted by forklift on to the robust bulk bag support frame. Spring loaded arms on the support frame gradually raise and tension the bag during discharge. This ensures that the bag is completely emptied and prevents the bag spout or liner from sagging or fouling the take-off conveyor.

The optional pneumatically operated massage system is adjustable in position for optimum effectiveness & ensures a consistent flow of difficult products.

SPECIAL APPLICATIONS

Although we have an extensive line of bulk bag unloaders we often design custom equipment for our customers.  Here are a few of our more unusual designs:

This explosion proof T3 loss-in-weight bulk bag unloader, ready for shipping, is constructed of stainless steel and has numerous custom designed features.

These very tall T3 Loss-in-weight Bulk Bag Unloaders are ready to ship out. Spiroflow designs bulk bag unloaders to any height requirement.

MODELS & SPECIFICATIONS

The T3 bulk bag unloader is one of several designs we offer.  Features of our various models are typically mixed and matched to accommodate specific application needs.  And, of course, we regularly build custom designs.  Here is a list of our basic models.  Your Spiroflow Sales Engineer will evaluate your needs and recommend the best configuration to do the job.

Specifications

The T3 Loss-In-Weight Unloader is used when unloading by weight.

This bulk bag unloader is of all welded construction with a bag support dish that will accommodate most bottom-spout bulk bags. The bag spout passes through the middle of the dish where it can be accessed. The bulk bag provides the seal against the support dish for a dust free seal. The heavy-duty 3″ (80 mm) square steel tube frame is welded directly to the support dish.

Our exclusive design mounts the four (4) load cells & summing box high on the frame between the frame & support dish, out of the way of harm, water & dirt. The system can be used with a number of options including our various controls options. The discharge of the chute is custom made to fit the application.

Standard Materials of Construction

Carbon/mild steel is standard.
Optional 304 or 316 stainless steel is available.

Pneumatic Requirements

Side Massage: 80 PSI (5.5 Bar) at 2 CFM (56.6 L)/Cycle
Corner Massage: 80 PSI (5.5 Bar) at 4 CFM (113.3 L)/Cycle
Bottom/Dish Massage: 80 PSI (5.5 Bar) at 1 CFM (28 L)/Cycle
Spout Closure Bars: 80 PSI (5.5 Bar) at 1 CFM (28 L)/Cycle

Chute/Hopper Vibrator: 80 PSI (5.5 Bar) at 3 CFM (85 L)/Cycle
Dust Collector: 80 PSI (5.5 Bar) at 35 CFM (991 L)/Cycle

Electrical Requirements

Optional Chute/Hopper Vibrator: 0.13 hp (.1 kW)
Optional Hopper Agitator: 0.33 hp (.25 kW)
Optional NEMA 4/ATEX Panel with ON/OFF Switch for Vibrator or Agitator: 0.33 hp (.25 kW)
Optional Dust Collector: 1.5 hp (1.1 kW)
Optional Level Probe: 24V DC

Dust Control/Air Displacement

Dust Extraction Port
Optional Integrated Dust Collector: NEMA 4, TEFC (Stainless Steel Only)
Optional Integrated Dust Collector: XP (Stainless Steel Only)
Optional Free-Standing Dust Collector: NEMA 4, TEFC (Stainless Steel Only)

COMPONENTS & OPTIONS

CONTROLS

Our T3 bulk bag unloaders can be provided with controls with or without a VFD.  Motor starter controls are available to operate a dish vibrator, hopper agitator or dust collector. Of course, full loss-in-weight, weight display and batching controls are available.

Please share your controls needs with your sales engineer for full specifications.

T3 Loss-in-weight Bulk Bag Unloader Questions?
We're Here to Help!