Acrison’s Model 821 and 822 Bulk Bag Unloaders provide a safe, clean, dust-tight, and highly effective means for discharging a wide assortment of dry solid materials from within bulk bags.
Overview
When a bulk bag is placed into a Model 821 or 822 Unloader, the bag ‘sits’ on the unloader’s vibratory bed, conforming to its shallow body. When energized, powerful flow-inducing forces (vibration) transfer from the bed into the bag and the material contained within, effectively and efficiently causing its contents to discharge until empty. The vibratory action, confined to the bed of the unloader, is produced by an adjustable, heavy-duty motorized vibrator, powered by a TENV motor (AC).
The vibratory body of the Bulk Bag Unloader is resiliently mounted onto the unloader’s heavy-duty tubular support structure, designed for floor mounting. A Bag Lifting Rack attaches to the lifting straps (or loops) of a bulk bag to lift the bag into the unloader. From floor level, bulk bags are lifted and placed into the unloader by a fork truck, by a hoist and trolley system integral to the unloader's support structure, or by a separate overhead hoist.
Once a bulk bag has been placed into the unloader, the bag is primarily supported by the unloader, and to a small extent, by the Bag Lifting Rack. As an option, the Bag Lifting Rack may include Acrison’s Automatic Bag Tensioner to maintain upward lift on the bag as it empties. The Bag Lifting Rack may also include Acrison’s optional Bag Liner Tensioner.
The difference between the Model 821 and 822 Bulk Bag Unloaders is the manner in which the bag spout interfaces with auxiliary equipment, and the ability to remove a partially empty bag. The Model 821 is designed to completely empty a bulk bag; it is not capable of closing off a partially empty bag for removal. However, the Model 822 Unloader does possess such capability when equipped with Acrison’s optional Model 82-SCV Bag Spout Closure Valve.
Model 821 Features/Benefits
- Utilizes ‘regulated vibratory action’ to produce positive and reliable discharge of a very wide variety of dry solid materials from within bulk bags.
- Available for bag loading with a fork truck or integral hoist.
- The outlet of the Model 821 Bulk Bag Unloader flexibly connects to an independently mounted Iris Valve/Untie Receptacle Assembly.
- The standard Iris Valve includes an aluminum body (does not come into contact with the product). Other materials of construction are optionally available.
- As standard, the Untie Receptacle is constructed in 304 SS (other materials of construction are available).
- The Untie Receptacle includes a hinged and clamped door for access to the bag spout. The outlet of the Untie Receptacle typically connects to auxiliary equipment.
- Completely dust-tight operation.
- As standard, the body of the unloader is available in mild steel and 304 SS construction (other materials of construction may be available).
- Includes the applicable basic Bag Lifting Rack (various Bag Lifting Rack accessories are optionally available).
- The Model 821 is operated by an adjustable motorized vibrator equipped with a TENV (AC) motor. Requires 230/460/3/60 power (other voltages are available).
- The unloader’s NEMA 12 control panel is mounted on a separate floor-mounted support adjacent to the main structure of the unloader.
- Designed with 4-inch square tubing, the unloader’s main support structure is totally heavy-duty in construction.
- All non-stainless steel surfaces are painted Acrison’s standard blue enamel.
Model 822 Features/Benefits
- Available for bag loading with either a fork truck or integral hoist.
- As standard, the body of the unloader is available in mild steel and 304 SS construction (other materials of construction may be available).
- Includes the applicable basic Bag Lifting Rack (various Bag Lifting Rack accessories are optionally available).
- Operated by an adjustable motorized vibrator equipped with a TENV (AC) motor. Requires 230/460/3/60 power (other voltages are available).
- The unloader’s heavy-duty main support structure is constructed with 4” square tubing.
- The unloader’s NEMA control panel is mounted on a separate floor-mounted support adjacent to the main structure of the unloader.
- Completely dust-tight in operation.
- All non-stainless steel surfaces are painted with Acrison’s standard blue enamel.
Models 821 & 822 Options
- Available with 316 SS product contact surfaces.
- The unloader’s main support structure is available in stainless steel construction (304 and 316 SS).
- Available with a pneumatically operated hoist and trolley.
- Bag Lifting Racks are available with Acrison’s Automatic Bag Tensioner to maintain the bag taut during the bag emptying process (also aids in the downward flow of material through and out of the bag).
- Bag Lifting Racks furnished with the Automatic Bag Tensioner are also available with Acrison’s Bag Liner Tensioner.
- Available in Sanitary Construction whereby all product contact surfaces are either 304 or 316 SS and finished in accordance with USDA and FDA Sanitary requirements.
- Electrical construction for operation in certain hazardous areas, which may include the use of a pneumatically operated hoist and trolley.
