T4 Unloader for Single Trip Bags

For unloading disposable bags which have no bottom spout

Single trip bulk bags are widely used in plant environments for low value or hazardous products which require a dust-free and controllable emptying method.

Our T4 bulk bag unloader can empty these disposable bags, which have no bottom spout, without waste or spills, even those containing poor flowing products, using various discharge aids and transfer conveyors to suit the application.

This model can be provided with a mobile frame, an overhead electric bag hoist and/or a double dust suppression membrane.  Of course, custom designs are always available.

Features

  • Static or pneumatic knife
  • Vibratory discharge aid
  • HOW IT WORKS
  • YOUR UNLOADING REQUIREMENTS
  • MODELS & SPECIFICATIONS
  • COMPONENTS

HOW IT WORKS

The T4 Single-Trip Bulk Bag Unloader is used with single-trip (disposable) bags that have no bottom spout. 

The bulk bag is sealed on the outer edge by a rubber membrane as it is lowered into the frame where a pyramid-shaped knife assembly pierces the bag bottom. Bags can be lowered with a forklift or the optional electric hoist. This bulk bag unloader is of all welded construction with a steel support dish that will accommodate any spout less bulk bag. The heavy-duty 3in./ 80 mm square steel tube frame is welded directly to the support dish. The discharge of the chute is custom made to fit the application.

How It Works

  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 if included.
  4. The weight of the bag contacts a static knife mounted on the Support Dish pierces the bottom of the bulk bag.
  5. The solid welded dish safely supports the weight of the bag.

The T4 consists of a robust frame and discharge dish with a knife to pierce the base of the bag. A double membrane with dust extraction facility ensures total containment of dust emitted during bag piercing operation.

The optional double membrane ensures that the bag sits deep within the dish and no dust escapes during discharge.

The bag is ruptured by the knife and product flows from the discharge dish into the integral transfer conveyor.

YOUR UNLOADING REQUIREMENTS

Before purchasing a bulk bag unloader always ask these key questions:

  • Will the bulk bag unloader accept varying bag sizes?
  • Will the bulk bag unloader handle poor flowing products?
  • Is there a forklift available or is an integral hoist needed?
  • Does the bulk bag unloader provide a controlled flow when the spout is opened?
  • Does the bulk bag unloader have a bag tensioning device to ensure all product is discharged?
  • Is discharge of the bag contents required by weight or by volume?
  • Is there provision for restraining and/or removing the inner liner?
  • Is an integral take-off conveyor required?
  • Is there a height restriction?
  • Is there a way to empty small bags in case the bulk bag supply of material is interrupted?
  • Does your plant require a hygienic bulk bag unloader or USDA/FDA approved equipment?
  • What dust control features are incorporated into the bulk bag unloader?
  • When untying the bag spout
  • While the product is being discharged
  • When the inner liner is being removed
  • When the bag is removed and folded for disposal
  • Is the product or environment hazardous?
  • Is static grounding and monitoring required?
  • Is the environment covered by NEC regulations?

MODELS & SPECIFICATIONS

The T4 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.

MODELDESCRIPTION
T1Entry level basic frame design available in the UK & Europe
T2For unloading by volume
T3For loss-in-weight unloading
T4For unloading single trip bags
T5For discharging in low headroom areas
T6Includes an integral hoist when a forklift truck is not available to load/unload bags into/out of the bulk bag unloader
T7For unloading multiple types of containers including bulk bags, rigid bins & boxes/octabins
T8For USDA/3A applications
T9-CVFor total containment when handling volatile or explosive materials
T10 & T11For pharmaceutical applications
Flo StyleFlo Style unloaders, from our purchase of Control & Metering, have a 40º or 60º sloped hopper that supports & shapes the bag for ease of discharge. Pulse vibration, instead of massage paddles, is used to induce material flow. The bag is kept elongated via gravity throughout discharge. It can be configured as a T2, T3, T4 or T6.

Specifications

  

Description

The T4 Single Trip Bulk Bag Unloader is used with single-trip (disposable) bags that have no bottom spout.

The bulk bag is sealed on the outer edge by a rubber membrane as it is lowered into the frame where a pyramid-shaped knife assembly pierces the bag bottom. Bags can be lowered with a forklift or the optional electric hoist.
This bulk bag unloader is of all welded construction with a steel support dish that will accommodate any spout less bulk bag. The heavy-duty 3 in./ 80 mm square steel tube frame is welded directly to the support dish. 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
Spout Closure Bars: 80 PSI (5.5 Bar) at 1 CFM (28 L)/Cycle
Note: If run continuously 8 L/min @ 5.5 bar
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)

Check out our Bulk Bag Unloader Comparison Chart 

This document compares our bulk bag unloader offerings based on design options.  Of course, our engineers will assess your application needs & recommend the optimal design.

COMPONENTS

Check out our Bulk Bag Unloader Comparison Chart 

This document compares our bulk bag unloader offerings based on design options.  Of course, our engineers will assess your application needs & recommend the optimal design.