Vacuum Conveyors offer an effective method of moving fine powders, granulated material, capsules, and other small particles in an enclosed, and hygienic manner.

Vacuum Conveyor Model 20 with Orange Blower and  Rotary Valve

Vacuum Conveyor

Our complete line of vacuum conveyors range from small portable units for minor ingredient unload or material transfer, to large units capable of moving up to 18,000 lb/hr of material and suitable for transport in bulk bag unloading, dosing, and batch feeding of process tanks, mixers, and other process equipment.

Vacuum Conveying Principle

The basic principle of vacuum conveying is to move the suspended material in a relatively uniform stream from a feed or supply source to a delivery point. The application of air, supplied via a vacuum pump or blower, creates a high enough air velocity and low enough solids to air ratio to effectively move the materials.

What Makes Our Vacuum Conveyor Different?

Side Access Panel

Side access panel to filter for Vacuum Conveyor.Our vacuum conveyors are engineered with unique features designed to make them easy to use, install, and maintain. Our side hinged side door access panel not only provides a tool-less entry and filter change, but also allows for installation in tight spaces, even near the ceiling.

Tooless Filter Changeout

Using the exclusive side panel door you can easily access the filter(s) for inspection or changeover. Threaded T-handle allows the filter(s) to be removed without the use of the tools, decreasing the time required to change out filters for general maintenance.

Less Energy Consumption – No Plant Air Required

The single switch operation starts the low-energy consumption regenerative blower or PD pump for larger units. Our vacuum systems use air flow only as a means of creating the vacuum, this means no plant air is needed for conveying; making our vacuum conveyors more energy efficient.

  • Lower Cost of Operation without the need for expensive plant air
  • Low energy consumption with our regenerative blower

Engineered Regenerative Blower

Illustration of regenerative blower on Vacuum Conveyor.What makes our vacuum systems different is our engineered design. Our design offers greater operational efficiency and energy savings while also providing increase capacity and less volatility of flow. Our regenerative blower works off a vortex air flow principle. This means that air is effectively moved between vanes as a single-stage impeller rotates. The spinning impeller and air flow create the vortex flow pattern, the single-stage impeller design creates the velocity energy to be regenerated many times as the air flows through the casing from inlet to discharge. This pattern of air flow offers significant advantages over traditional impeller designs;

  • High Efficiency/Lower Noise Levels – The traditional double-sided impellers create an air flow patter with twin vortices, as the two vortices intersect at the blower discharge the volatility creates significant noise. Our lower DBA unit means less added noise in your facility
  • Lower Ambient Operating Temperatures - The single-stage impeller design generates less heat during normal operation than a traditional double-sided impeller. This means longer life for the motor and less heat dissipating into your facility.

Continuous Flow – Greater Capacity

Our Vacuum Conveyors come with various value options. We will select the best discharge valve for your application. What makes our units unique is our rotary valve design. Many vacuum conveyors operate using an intermittent design, where the chamber is filled with material and then a trip point is reached to activate the discharge valve. Once the material is discharged, the valve closes again. This causes some carry over material to stay in the line until the next cycle when there is air pressure to move product to the final destination. For most applications, we don’t see this type of operation as effective. Our Vacuum Conveyors with the rotary valve option, provide for an even, continuous flow providing you greater capacities in smaller sized units; this means lower initial equipment cost and lower operating costs when compared to intermittent systems.


next: Vacuum Conveyor Operation

All NEW Vacuum Conveyor for Explosive Applications

The risk of explosion continues to be an operational for just about every processing company. To address this Hapman introduces its NEW E-Line of Vacuum Conveyors design to be fitted with either explosion venting or an explosion suppression system. In order for an explosion diffusing system to function properly in a vacuum system the conveyor canister must be able to contain a certain level of pressure before the system activates. This new line of Hapman conveyors provides this level of protection while still offering the features which have made this Vacuum Conveyor the standard bearer in the industry. Side access door for filter removal and reverse pulse filter cleaning come as standards with this new line of Hapman Vacuum Conveyors – all while containing the required pressure.

  • Designed to maintain up to 14.5 psi of pressure.

  • Available in Model sizes 30, 36, and 42.


  • Maintain filter efficiency with reverse-pulse filter cleaning system.
  • Change filters quickly with easy-to-access side door. No tools needed. See our video below.
  • The integral regenerative blower conveys material without using plant air or a separate compressor.
  • Handle up to 18,000 lbs/hr (8,186 kg/hr).

No Tools Needed - Filter Removal

next:Vacuum Conveyor Options


  • Aluminum, carbon steel, 304 stainless steel or 316 stainless steel construction.
  • Slide gate, dump gate, rotary valve, or butterfly valve to discharge your material. See the images below for more detail.
  • Increase installation flexibility with portable base.
  • Standard, Food grade or sanitary finishes available
  • Teflon coating, air pads, or electro polish for difficult flowing materials
  • VFD can be used on blower to help decrease degradation
Vacuum Conveyor with Portable Base

Vacuum Conveyor with Portable Base

Detailed Features

next: Vacuum Conveyor Specifications


Model 16 20 24 30 36 42
Capacity 21 ft3/hr
(0.6 M3/hr)
45 ft3/hr
(1.3 M3/hr)
96 ft3/hr
(2.7 M3/hr)
135 ft3/hr
(3.8 M3/hr)
225 ft3/hr
(6.4 M3/hr)
360 ft3/hr
(10.2 M3/hr)
Blower Size** 1.5 HP 2.5 HP 5 HP 10 HP 15 HP 20 HP

Note: Specifications subject to change without notice. Contact a factory sales engineer for specifications and options.

*Nominal capacity based upon 50 ft. (15,24 m) equivalent length piping.

**Larger blower sizes and configurations available.

Models & Detailed Features

Click the images below to enlarge

next: Vacuum Conveyor Applications

Vacuum Conveyor Application Examples

Our unique side-panel access Vacuum Conveyors offer virtually unlimited installation possibilities. The side access door allows for easy access to the filter and no interference with the side mounted blower or pump.


Batch Process Powder Line

In this installation two Model 20 Vacuum Conveyors sit side-by-side for handling load surges during high volume conveying when material is delivered from a semi-trailer. The powder material is conveyed from the off-load point into the storage silos where material is kept until needed for process.

Major/Minor Dry Material Vacuum Batching System

Illustration of complete system layout in a major/minor dry material Vacuum Bathcing System.

This system is engineered for the batch processing of major and minor ingredients to create a blended mixture for further processing downstream. The engineered bulk material handling system uses vacuum conveyors to effectively pull materials from each unload point and deliver a mixed materials batch into one of two storage silos. A complete controls package continually monitors the delivery of each material to produce the required feed rate. The batch controls allow operators to adjust the mixture and ratios on demand, giving processors the ability to create thousands of recipe variations within the framework of a single system.

The components of the system work together to form the batching system, these components include;

Major Ingredient Handling:

Bulk Bag Unloaders - Each is equipped with a 2 ton electric hoist and pneumatic bag agitation for efficient material flow. The unloaders have load cells for the accurate, real-time measurement of material flowing out of the FIBC’s (loss-in-weight). Each bulk bag unloader also contains a bag tie box for full-flow shut-off prior to full bag emptying.

Gravimetric Screw Feeders – located at the discharge of each bulk bag unloader, the feeders meter the flow of material to an accuracy of +/- 1%. Actuated diverting valves open to the percent required to meet the formula call for material.

Minor Ingredient Handling:

Bag Dump Stations – Each of the minor ingredient stations have manual bag dump with integral dust control to 1 micron. The discharge has an actuated diverting valve that is opened and closed automatically at the required ratio to meet the recipe material call.

Vacuum Conveying System:

The vacuum system is sized to handle the maximum required flow rate of the blended product. An actuated diverting valve allows for controlled filling of the holding tanks. The integral regenerative blower on each conveyor generates the vacuum that effectively pulls material through the piping and into the tanks. No expensive plant air is required to operate the conveyors. The self-pulsing system keeps the filters clean. When maintenance is required, the tool-less access side door provides for quick and easy change of the filters. The storage tanks have level controls that open or close the discharge valves on the conveyors. The controls allow for minimum and maximum levels to continually and automatically be maintained inside the tank.