Valve Bag Packing Machine for Powder Materials

Controlled weighing and filling for cement, dry mortar, minerals and other dry powders

A valve bag packing machine is designed for filling dry powder materials into preformed valve bags by controlled weighing and material feeding.

Valve bags are widely used for cement, dry mortar, construction materials, minerals and other powdered products because the bag can be filled through its valve without requiring an open top during the filling process.

Tongding provides different valve bag packing configurations according to material characteristics, bag weight, filling accuracy, production capacity and required automation level.

What Is a Valve Bag Packing Machine?

A valve bag packing machine combines material feeding, weighing and controlled filling into a single packaging operation.

The typical process is:

Depending on the machine configuration, pneumatic assistance, air suspension, impeller feeding or other feeding methods can be used to match different powder characteristics.

The choice of filling technology depends on factors such as:

• Powder particle size
• Bulk density
• Flowability
• Bag weight
• Required filling accuracy
• Required packaging speed
• Dust control requirements

Valve Bag Packaging for 25 kg Powder Products

25 kg bags are commonly used for cement and dry powder construction materials. A valve bag filling system can be configured for 25 kg applications according to the product and required output.

Typical products may include:

• Cement
• White cement
• Dry mortar
• Tile adhesive
• Wall putty
• Gypsum plaster
• Calcium carbonate
• Dolomite
• Industrial talc
• Barium sulfate
• Fine sand
• Cementitious adhesives

The exact filling configuration should be selected according to the material’s bulk density, flowability and bag specifications.

Different Valve Bag Filling Methods

Impeller Valve Bag Packing Machine

The impeller system uses a rotating impeller to move powder into the valve bag. It is suitable for conventional dry mortar and cement mortar applications where cost-effective packaging and stable operation are important.

Air Float Valve Bag Packing Machine

The air-float system uses low-pressure air to assist powder flow. It is particularly useful for fine and lightweight powders where smooth material flow and higher weighing accuracy are important.

Typical applications include:

• Tile adhesive
• Wall putty
• Gypsum plaster
• Fine powder products

Air Blow Valve Bag Packing Machine

The air blow system uses compressed air to move powder into the bag. It can be used for dry mortar and relatively coarse powder or granular materials.

The appropriate filling method depends on the actual material rather than simply the product name.

Filling Accuracy and Packaging Capacity

Two important parameters for valve bag packaging are:

Filling Accuracy

The required accuracy depends on: product characteristics, weighing system, bag weight, feeding method and filling speed.

Packaging Capacity

Packaging output can be expressed as bags per hour or tons per hour. The actual tons-per-hour output depends on bag weight.

For example, a system packaging 25 kg bags needs a higher number of bags per hour to achieve the same tonnage as a system using 50 kg bags. For this reason, Tongding recommends selecting the packaging system according to both bag weight and required hourly output.

Dust Control During Valve Bag Filling

Dust control is an important consideration when packaging cement, dry mortar, mineral powders and other fine materials.

Depending on the application, the system can incorporate:

• Dust collection
• Dust recovery
• Enclosed material transfer
• Controlled bag filling
• Conveying systems
• Sealing or bag closing equipment

The actual dust collection configuration should be selected according to the material and plant layout.

Valve Bag Packaging System Integration

A valve bag filling machine does not always operate as a standalone machine.

For a complete production line, it can be connected to:

Available downstream equipment may include:

• • Bag conveyors
  • Check weighers
  • Robot palletizers
  • Automatic bag stackers

• Stretch wrapping machines

Valve Bag Packing Machine for Different Powder Materials

Material testing and equipment selection may be required for powders with unusual flowability, density or particle characteristics.

Semi-Automatic or Automatic Valve Bag Packaging?

The appropriate automation level depends on production requirements.

Semi-Automatic

Suitable when:

• Operators manually place bags
• Production volume is moderate
• Investment needs to be controlled
• Flexible operation is required

Automatic

Suitable when:

• Production volume is high
• Continuous packaging is required
• Automatic bag handling is needed
• Palletizing and stretch wrapping are included

Tongding can configure the packaging equipment according to the required operating method and factory layout.

What Information Is Needed for Machine Selection?

Before selecting a valve bag packing machine, we recommend confirming:

• Product name
• Bulk density
• Particle size
• Bag type
• Bag weight
• Required filling accuracy
• Bags per hour
• Required tons per hour
• Feeding method
• Automation level
• Palletizing requirements
• Destination country

This information allows the equipment configuration to be matched to the actual production process.