The choice of conveying methods is crucial in various industries, especially when dealing with bulk materials like cement, minerals, and powders. Two popular methods, Air Slide Fabric and Dense Phase Conveying, are often used. This article compares and contrasts these two methods, highlighting their advantages and applications.

Air Slide Fabric is a specialized pneumatic conveying system designed for the efficient and dust-free handling of fine, dry materials like cement. It relies on low-pressure airflows to transport materials, using a porous fabric to achieve the conveying process.

Key Components

  1. Air Permeable Fabric: At the core of the Air Slide system is the air-permeable fabric, which allows air to pass through while holding the solid material. This fabric is typically made from high-quality synthetic fibers.
  2. Air Supply System: An essential component, the air supply system includes a blower or compressor responsible for generating low-pressure airflows to move the conveyed material.
  3. Trough or Channel: The fabric is enclosed within a trough or channel that guides and directs the material’s path.

Understanding Dense Phase Conveying

Dense Phase Conveying, in contrast, is a method that relies on the use of higher air pressure to transport materials through a pipeline. This method is suitable for various materials, including both fine powders and granules.

Key Components

  1. Pressure Source: Dense Phase Conveying requires a higher-pressure source, typically provided by a compressed air system, to propel materials through the pipeline.
  2. Pipeline System: The materials are transported in a closed pipeline system, which can be customized to suit the specific material being conveyed.
  3. Air Solids Separation: Dense Phase systems usually incorporate an air-solid separation device to ensure only the material is discharged at the destination point.

Six Comparison of Air Slide Fabric and Dense Phase Conveying

Dust Emissions

Air Slide Fabric is well-known for its ability to convey materials, especially fine powders, with minimal to no dust emissions. This is essential in industries where dust control is a priority, such as cement manufacturing.

Dense Phase Conveying also results in minimal dust emissions, making it suitable for various materials, including granules and powders.

Material Compatibility

Air Slide Fabric is ideally suited for dry, fine materials like cement and fly ash. It may not be as versatile when handling materials with different characteristics.

Dense Phase Conveying can handle a wide range of materials, making it suitable for industries where material diversity is common.

Material Integrity

Air Slide Fabric excels in maintaining the integrity of conveyed materials, ensuring minimal degradation during the conveying process.

Dense Phase Conveying also offers good material integrity, but it may be less gentle on materials compared to Air Slide Fabric.

Airslide fabric

Energy Efficiency

Air Slide Fabric is highly energy-efficient, requiring low-pressure airflows for conveying.

Dense Phase Conveying is moderately energy-efficient, as it relies on higher air pressure for material transport.

Maintenance Needs

Air Slide Fabric systems are known for their low maintenance requirements, contributing to reduced operational downtime and costs.

Dense Phase Conveying systems have moderate maintenance needs, depending on the specific system design and the materials being conveyed.

AspectAir Slide FabricDense Phase Conveying
Conveying PrincipleLow-pressure airflowHigh-pressure airflow
Material CompatibilityDry, fine materialsVarious materials
Dust EmissionsMinimal to NoneMinimal
Material IntegrityExcellentGood
Energy EfficiencyHigh EfficiencyModerate
Maintenance NeedsLow MaintenanceModerate


In the world of material handling, choosing the right conveying method is crucial. Air Slide Fabric excels in dust control and material integrity for dry, fine materials, while Dense Phase Conveying offers versatility for a wide range of materials. Each method has its advantages, and the choice depends on the specific requirements of the industry and the materials being handled.