Vacuum Conveyors

VOLKMANN’s Vacuum Conveyors can transport numerous granulated bulk materials, small parts, powders and pigments under vacuum in lean and dense phase through hoses and pipes.

They are easy to install and quite simple to operate. By using vacuum these systems are able to keep the production environment clean.

Due to constant development and improvement in technology, removal of explosion risks and with a focus on good hygienic solutions, Vacuum Conveyors today are a preferred choice in many industries. They are capable of transfering nano-sized material and fine dust with particles size from 0,1 µm up to bigger sized tablets, sweets or bottle caps for example. They are good for highly abrasive powders, mixtures, light filling materials (such as fumed silica with abulk density of only  0,05 kg/l ), but also work well with metal powders which can have bulk densities of up to 10 kg/l.


They can make all powder handling in production processes safe and reliable, makeing the work of operators easier and improving the conditions in the workplace: choose Vacuum Conveying systems from VOLKMANN.

Aufgabe und Abgabesysteme beim Vakuumförderer

  • user friendly systems with safe material transfer
  • easy material pickup and dust-free loading of machines
  • gentle dense phase conveying, no segregation of material mixtures
  • optimum hygienic conditions
  • reliable filter systems in GMP quality
  • simple to install and to operate
  • low energy consumption
  • favorable investment- and operating costs
  • product contact parts are 316L Stainless Steel or FDA approved soft parts

Suitable for the Chemical, Pharma and Food industries (amongst others), our modular designed Vacuum Conveyors offer an easily customisable solution to match each individual application. Even critical materials can be conveyed safely and modified conveyors can be used for hazardous applications, such as inside explosion risk areas or with highly toxic materials.

Our modular design allows for quick dispatch times for complete standard conveyors (approximately 1-2 weeks for Food-/Chemical-Conveyors, 3-4 weeks for Pharma Conveyors, 4-8 weeks for highly customized systems).

Conveying capacities: 100 kg/h up to 3.5 t/h (with a possible maximum of about 12 t/h)

Conveying distance will affect the achievable transfer rate and have been seen to vary from as little as a few meters up to 100m (with total lift of 40m).

We offer conveying trials and demonstrations on-site or in our test facility. With any query we analyze your material handling task, along with any special requirements, to convey your products. We want you to be sure, that the required capacity is reached, that your product is not affected in an unacceptable way by the transportation, and convince you of the stability of the vacuum conveying process provided by Volkmann Conveyors.

How Vacuum Conveyors Work

Vacuum conveyors transport powder, dust, pigments, granulated material, tablets, capsules, small parts etc. in a suction air stream under vacuum through hoses or pipes. They are easy to install and to operate. Even if leakages occur, no product can escape into the environment because of the vacuum.

So funktioniert der Vakuumförderer

  1. The vacuum pump (1) generates a vacuum in the Vacuum Conveyor’s separator body. Air rushes in, from the feeding point (A) through the hose/pipe and into the suction inlet (2). The bulk material is areated and then carried in this air stream.
  2. Due to the special designed separator body, the velocity is reduced and the material is collected gently above the vacuum conveyor’s discharge valve. Inside the separator body a filter module (3) separates airborne dust and product from the conveying air. With fine dust, a cyclone element can be inserted into the separator to help provides higher transportation capacities due to the lower loads across the filter elements.
  3. When the separator is filled with product, the vacuum pump switches off. Inside of the vacuum conveyor the pressure is equalises with the surrounding area within tenths of a second. The separated material is discharged from the vacuum conveyor through the discharge valve and falls directly into the receiving location (B).
  4. When the conveyor discharges, the filter elements are cleaned automatically by an air shock system. The occasional filter cake is released from the filters. Volkmann offers piston vibrators and fluidizing units to improve the discharge of sticky or bridging bulk materials.
  5. After unloading the product the discharge element closes and the whole conveying cycle starts again.

A) Material loading (pick-up) location– All materials can be picked up directly out of/from production- and process machines, bins, bags, containers etc.
B) Vacuum Conveyor
C) Material discharging (receiving) location – The transported material is loaded in cycles from the top into a bin or process machine, for example into blenders, presses, bins, filling- and packaging machines etc.

VS Vacuum Conveyors

VS-VakuumfördererThe VS Series Vacuum Conveyors are designed to be a versatile solution for safe and hygienic powder handling. The VS Series is used in various industries for the transfer of powder, dust, granulated material and small pieces.

Vacuum Conveyors of the VS Series are

  • compact
  • lightweight
  • easy to install and operate
  • quick and simple assembly/disassembly by hand without tools
  • safe and reliable
  • hygienic and easy to clean

VS Vacuum Conveyors are able to provide conveying rates from approximately 100 up to 10.000 kg/h.

Advantages of Volkmann VS Vacuum Conveyors

  • hygienic design of all components
  • state of the art filter technology
  • no compacting of the powder within the conveyor
  • easy product discharging, full bore opening
  • purely pneumatic powered systems with failsafe controls
  • electrical Vacuum Pumps upon request
  • valves, fittings, instruments, controls according to customer specifications

Their unique modular design allows perfect configuration according to the specific demands of the conveying application and to give the highest benefit for the production process. To help with finding the best suitable solution for the application we use our knowledge from previous projects, our product database and custom tests with the particular material. The design of the VS Conveyors is completely electrically conductive.

All new VS Conveyors are ATEX certified in accordance with directive 94/9/EG for the installation inside Zones 1, 2, 21, and 22. EC-type examination certificate No. TÜV 02 ATEX 7005 X. For safe operation special terms/conditions apply. [Ex] II 1 D c 80°C / II 2 GD 100°C (T4)

PPC Pharma Vacuum Conveyors

PPC Pharma-VakuumfördererThe PPC Series Pharmaceutical Vacuum Conveyors are designed specifically for all applications requiring the highest quality of materials, surfaces and characteristics for all parts in contact with the conveyed materials. These conveyors are mainly used in the Pharmaceutical and Colour/Lacquer industries where their one-piece body design, and electro-polished finish, allow for more accessible internal surfaces with fewer joins, cracks, or crevices for an easier, and more reliably, cleaned conveyor, helping to prevent cross-contamination between products and batches.

The superior manufacturing quality of the PPC conveyorswith the gap-free design removing inaccessible spaces where product might collect, fulfils the highest quality demands. But, units are still easily dismantled without tools, can be cleaned quickly and can be sterilized.

The design of the PPC Conveyors is completely electrically conductive, free of gaps, without any inaccessible spaces where the product might remain. PPC Conveyors are fitted with a large butterfly valve for discharging, which can also be easily dismantled without tools.

PPC Vacuum Conveyors are offered as pre-configured units regarding for the individual application. Customers choose from a variety of Pharma or electrically conductive filter systems (for example for use with hazardous inflammable materials). Special coatings, clamp modules, valve assemblies, WIP/CIP systems are available upon your request.

INEX Vacuum Conveyors

Vacuum Conveyors with Inerting function: Volkmann INEX.

INEX VakuumfördererVolkmann INEX Vacuum Conveyors provide safe loading of bulk materials into hazardous areas, particular in the Chemical and Pharma Industries, where the loading of powders into reactors and stirring vessels is requiered. INEX systems can be used inside all gas and dust explosion zones.

Initially material is sucked into the separator of the INEX system. Before the material is discharged, the transportation line is closed and the INEX system is set under vacuum. Then, the material inside the INEX system is areated with inert gas (for example Nitrogene) from the bottom and then released through the systems discharge valve. The concentration of Oxigen during discharge typically is below 7% or limited to such a value to not compromise the inert feed of the system.

For the conveying of hybride mixtures, where the transfer of powders containing solvents, the entire vacuum transportation process with an INEX Vacuum Conveying system takes place under inert atmosphere.

Volkmann INEX Vacuum Conveyors for hazardous applications and Explosion Zones

  • free of ignition sources
  • operate completely pneumatic without electricity
  •  completely electrical conductive design
  •  small interior filling volumes
  • low transportation speeds
  • no heat produced
  • no hot surfaces
  • no rotary parts
  • easy to control and to operate.

Volkmann provides profound expertise and support for all hazardous applications relying on our experience and knowledge. All systems have been designed for the specific demands of hazardous applications.

All new VOLKMANN Vacuum Conveyors INEX-VS, INEX-PPC and INEX-“pressure rated” Series are ATEX certified in accordance with directive 94/9/EG for the installation inside Zones 0, 1, 2, 21, and 22. EC-type examination certificate No. TÜV 03 ATEX 7017 X. For safe operation special terms/conditions apply. [Ex] II (1) G D (discharging)/ II (1) D (2) G (inlet) II 2 G D c TX

Vacuum Conveyors for Tablets

TablettenfördererThe transfer of tablets is more than just providing a certain throughput, quality of the products are of high importance. Mechanical damage, chipping, scratches, wear, colouring etc. must be avoided.

Tablet Conveyors from Volkmann are designed to provide a gentler transfer process to help minimise damages to sensitive and delicate products. Tablets can be picked up from a variety of locations, including containers, tablet presses and can load containers without generating dust. They are easy and flexible to install and offering a reliable and safe automatic product transfer, even with applications where there is limited headroom.

In Volkmann Tablet Conveyors all product contact sufaces are designed to be wear-free and are either made from glass or coated with FDA approved shock absorbing materials.  Additionally, some smart ideas realized inside the conveyors, allow the reliable and mostly gentle transport of highly sensible materials.

We supply individually customised Vacuum Conveying systems and complete Vacuum Transfer solutions, that can be used for the conveying and dosing of Pharmaceutical raw materials and APIs. Talk to us and use our experience of bulk material handling in the chemical and pharmaceutical industries.

Continuous Vacuum Conveyors CC

CC Vacuum Conveyors provide continuous aspiration and material flow, both at the material pickup and the dischage locations.

Inside the Vacuum Conveyor a Volkmann vacuum pump/filter combination is operating continuously for constant aspiration and vacuum transport. The individual pump/filter combinations are switched off, in sequence, to allow for reverse jet filter cleaning, this is while the others are still operating making sure that the constant transfer of material is possible.

The CC separator is equiped with a Volkmann designed and produced rotary valve (ATEX approved). The transported material can be conveyed, then separated and discharged from the separator/conveyor with almost no delay due to the ingenious design of the CC Vacuum Conveyor and its airflow. The amount of remaining material is limited, with adhesive material a pneumatic piston vibrator is used for further reduction of material which might accumulate on surfaces inside the separator.

The CC Conveyor and all its parts including the rotary valve can be dismantled easily by hand. All product contact parts are of a hygienic design and easy to clean (all stainless steel 316L or FDA-approved materials).

Separator diameters of CC Vacuum Conveyors available from 200 up to 350 mm, with rotary valves diam. 100 or 150 mm. Conveying rate 1 – 500 kg/h.

Pressure Resistant and Shock-Proof Vacuum Conveyors

Druckfester Förderer-beWith these Vacuum Conveyors, materials can be transferred directly into areas with positive pressure above atmosphereic (for example directly into chemical reactors). These systems are available to operate within the pressure ranges of -1 to +6 bar or -1 to +10 bar). These conveyors are designed in accordance to the pressure-equipment-directive 97/23/EG with standard flanges diameter 150, 200, 250 and 300 mm.

Besides the material transfer application and the resulting demands, the explosion prevention concept chosen by the customer and individual customer safety guidelines and requirements can make such pressure resistant and/or pressure-shock proof Vacuum Conveyor designs necessary.

Pressure resistant Vacuum Conveyors from Volkmann can be operated like “standard” Vacuum Conveyors and run with compressed air, aerating with filtered air from the material pickup point to convey the material. Optionally, the pressure resistant conveyors are available in Volkmann’s INEX design which purges the separator and material with inert gas (Nitrogen), to lower the Oxygen content inside the conveyor before discharging the transported material into the process.

Pressure resitant Vacuum Conveyors from Volkmann meet your safety requirements in every respect and offer you safe bulk material handling.

Vacuum Conveyors For Liquids

Volkmann Vacuum Conveyors of the VS and PPC series can be used to transfer liquids with very few modifications.  A float valve is used to protect the Vacuum Conveyor and its pump from overfilling.


  • Conveying of fruit and vegetables under water to prevent oxydation (change of color etc.)
  • Unloading filter media, granulated material, charcoal etc. from filter tanks
  • Pickup and transport of wet filtration cake
  • Remove sediment from lubricant pump pits

Powder locks, double flap locks, pressure resistant and shock resistant vacuum conveyors

Double flap locks

Powder locks and/or double flap locks ensure that when filling containers, there is no direct contact between the container interiors of the unit to be charged and the surrounding environment. They also prevent hazardous substances from escaping.


VOLKMANN powder locks can be easily purged with an inert gas (for example Nitrogen) so that no unwanted atmosphere (Oxygen) passes from the lock into the receiving vessel. With the powder lock, it is also possible to avoid carrying unwanted receiving vessel gases passing back through to the conveying process.

Pumps For Oil And Grease

Small size standardized models help to keep your production areas dry and clean. Use our Liquid-Conveyors for the easy and reliable suction and disposal of various liquids like oil or emulsion and even greasy substances. Our units can filter the liquids directly into collector tanks, bags, barrels and production machines.

Even metal chips from milling can be conveyed and won’t cause wear to our units.

Standard applications:


    • Suction of cutting/machining liquids (such as oil and emulsion) directly from bottom-collector plates below production machines, with integrated filter for 100% liquid re-cycling.
    • Conveying and recycling of test fuels on egine test stands.
    • Conveying of Oil, Gas and Kerosine from floors inside production and maintenance areas. Suction of these substances is also possible from water-surfaces in case of accidents.
    • Cleaning, suction and collection of greases during the maintenance of bearing elements.

Liquid Suction hights up to 9 m (depending on density and viscosity) Capacity 0,1 – 200 m3/h

CallCenter Volkmann
Please use our callback service.