How Vacuum Conveying Works

With vacuum conveying, materials are drawn to the delivery point through a totally enclosed pipeline, in a clean, contained stream of air generated by a vacuum blower package.

In vacuum conveying, no moving parts contact the materials, no dust escapes into the atmosphere and no contamination can enter the system.

The Advantages Of Vacuum Conveying

  • Efficiency
  • Safety
  • Hygiene
  • Cost effectiveness
  • Flexibility
  • Automation
  • Dust free operation
  • No contamination

Elements of a Vacuum Conveying System

From pick-up probe to piping to receivers and vacuum blowers, Coperion K-Tron offers a wide range of equipment for pneumatic conveying needs, whether for automated refill of feeding systems or as stand alone conveying applications. The following list describes the varied elements available from Coperion K-Tron for building a complete conveying system for loss-in-weight feeder refill (pictured in the diagram below).

Elements of a conveying system

Material Pick-up
From simple suction wands for free flowing materials to fully fluidized feed bins (1), silo pick-up pots (2) or bag dump stations (3) with prefeeders for powders, Coperion K-Tron offers a wide variety of equipment to ensure reliable material pick-up into the conveying air.

Conveying Line
Connecting one or multiple material pick up stations to a vacuum receiver. To ensure blockage-free conveying, diverter valves (4) and line clearance valves (5) are available in addition to the piping (6).

Vacuum Receivers
Various models of central (7) and self-contained receivers are available to separate the material from the conveying air stream, alternating between suction and discharge modes of operation.

Sequence & Vent Valves
Sequence & vent valves (8) allow the air stream to bypass and vent the vacuum receiver during the discharge cycle.

Blower Packages
Vacuum blower packages include the pump -- PD blower (9), sliding vane or rotary lobe blower(10) -- to produce the air stream as well a bypass valve (11) to allow the blower to run while no receiver is conveying and a secondary filter (12) to protect the vacuum pump from entrance of foreign bodies.

LSR controller is available to control a single central or self-contained unit. To control the sequence of a multi-component system microprocessor (MPC) or programmable logic (PLC) controls (13) are available which are programmed to suit the client’s process. Siemens, Mitsubishi and Allen Bradley PLC controls are available.

Special Pneumatic Conveying Projects

Unique problems are a welcome challenge to Coperion K-Tron; they often introduce us to a whole new area of business.

Whether replacing outdated technology or mechanizing manual operations, our resourceful designers will engineer a custom vacuum conveying solution.

Examples of Challenging Vacuum Conveying Projects

Fragile foodstuffs such as nuts and spaghetti shapes were being handled using cumbersome, difficult to clean bucket elevators... until we designed a gentle pneumatic conveying system that caused no product damage.

Hot melt adhesive pellets were always manually handled, exposing operators to fumes and splashes of hot molten glue... until we developed vacuum conveying equipment which ensures continuous direct transfer of the pellets to the point of use.

Safety and hygiene

Wherever hygiene, product integrity, dust control and operator safety are paramount, Coperion K-Tron can provide clean controlled vacuum conveying.

Batch and Continuous

Our vacuum conveying equipment delivers bulk materials in batches or as a continuous flow, lending itself to a wide range of applications:

  • transfer from bulk storage to process
  • check screening of raw materials
  • mixer loading and unloading

Products Coperion K-Tron Has Conveyed with its Vacuum Conveying Systems

From our test data on more than 5000 products, here are just a few of the many products Coperion K-Tron can convey:

Vacuum Conveying of Plastic Products

  • flake
  • regrind
  • pellets
  • pellet-powder blend
  • PP (polypropylene)
  • PS (polystyrene)
  • PE (polyethylene)
  • PET (polyethylene terephthalate)
  • EVA (ethylene vinyl acetate)
  • glass filled PP pellets and regrind 
  • nylon pellets
  • wood flour
  • PCV compound
  • TIO2
  • soft pellets
  • CaCo3 (calcium carbonate
  • acrylic pellets 

Vacuum Conveying of Food Products

  • icing sugar
  • flour
  • granulated sugar
  • dextrose
  • bread crumbs
  • coffee granules
  • tea
  • coconut
  • grated cheese
  • full cream milk
  • peanuts
  • salt
  • frozen vegetables
  • chocolate coated sweets
  • puffed rice
  • batter mixes
  • (and thousands more)

Vacuum Conveying of Chemical Products

  • stannous chloride
  • china clay
  • talcum
  • aerosil (fumed silica)
  • fullers earth
  • sodium sulfate
  • metal powders
  • gypsum
  • hydrated lime
  • gelatin
  • detergents
  • salt

Vacuum Conveying of Pharmaceutical Products

  • filled capsules
  • laxatives
  • aspirin tablets
  • cold and flu remedy
  • citric acid
  • bicarbonate of soda
  • milled sugar
  • tablet granulate
  • magnesium
  • enzymes
  • sodium sulfate
  • contraceptive pills
  • paracetamol
  • effervescent powder

Vacuum Conveying of Speciality Products

  • Component conveying
  • Hot melt glue systems

Typical Vacuum Conveying Applications

Single Pick-Up Single Destination
Single Pick-Up Single Destination

Multi Pick-Up Single Destination
Multi Pick-Up Single Destination

Single Pick-Up Multi Destination
Single Pick-Up Multi Destination

Multi Pick-Up Multi Destination Single Line
Multi Pick-Up Multi Destination Single Line

Multi Pick-Up Hopper Selection
Multi Pick-Up Hopper Selection

Individual Pick-Up Single Vacuum Source
Individual Pick-Up Single Vacuum Source

Blender Loading System (Direct Vacuum)
Blender Loading System (Direct Vacuum)

Dense Phase Vacuum System
Dense Phase Vacuum System

Inline Mill or Screen System
Inline Mill or Screen System

Protected System (Explosive Material)
Protected System (Explosive Material)

Positive Pressure System
Positive Pressure System

Positive/Negative Pressure System
Positive/Negative Pressure System

Single Material Weighing System
Single Material Weighing System

Multi Material Weighing System
Multi Material Weighing System

Through Put Totalizing System
Through Put Totalizing System

Loss-in-Weight Feeder Refill
Loss-in-Weight Feeder Refill