Vacuum Conveyors

Front view of a vacuum conveyor from Hapman

Hapman vacuum conveyors offer an effective method of moving fine powders, granulated material, capsules and other small particles in an enclosed, hygienic manner

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

Vacuum Conveyor Models


The LP Series vacuum conveyor is designed to fit in spaces where other vertical vacuum conveyors will not. Utilizing the high efficiency regenerative blower, the LP Series provides you with a lot of conveying in a small package. Ease of service is provided with the tool-less filter access. And, the reverse pulse filter cleaning system keeps the LP operating at the most efficient level.

  • Designed to maintain up to 14.5 psi of pressure
  • Available in Model sizes 24, 30, 36, and 42
  • Low profile design allows unit to fit in to tight spaces where other filter/receivers cannot
  • Filter access door on side of unit so no overhead access is required
  • Tool-less filter removal
  • Convey rates up to 1.25 CFM


All NEW Vacuum Conveyors for Explosive Applications

The risk of explosion continues to be an operational concern for just about every processing company. To address this issue, Hapman has introduced our NEW E-Line of vacuum conveyors designed 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. Our new E-line of conveyors provides this level of protection while still offering the features which have made this vacuum conveyor the standard bearer in the industry. A side-access door for filter removal and reverse pulse filter cleaning come as standard features – all while containing the required pressure.

LP Series Vacuum Conveyor |
LP Series Vacuum Conveyor Tooless Filter Removal |


Vacuum conveyor with slide gate valve option. |

Vacuum Conveyor with Slide Gate Valve Option

Vacuum conveyor with dump gate valve option. |

Vacuum Conveyor with Dump Gate Valve Option

Rotary valve design for continuous material flow |

Rotary Valve Design for Continuous Material Flow


The Conveying Principle

The basic principle of conveying is to move suspended bulk 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 Hapman Vacuum Conveyors Different?


Our vacuum conveyors are engineered with unique features designed to make them easy to use, install, and maintain. Using the exclusive side-panel door you can easily access the filter(s) for inspection or changeout. The threaded T-handle allows the filter(s) to be removed without the use of the tools, decreasing the time required to perform routine maintenance. The side access door also allows for installation and conveying in tight spaces, even near the ceiling.


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

The engineered design of our vacuum conveyors offers greater operational efficiency and energy savings while also providing increased 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, while 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. Higher Efficiency/Lower Noise Levels – The traditional double-sided impellers create an air flow pattern 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 conveying operation than a traditional double-sided impeller. This means longer life for the motor and less heat dissipating into your facility.


Our conveyors come with various valve options. We will select the best discharge valve for your application. What makes our conveyor 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 carryover material to stay in the line until the next cycle when air pressure moves 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 an even, continuous flow for greater capacities in smaller-sized units. This means lower initial equipment cost and lower operating costs when compared to intermittent conveying systems.

Conveyor Features

  • Reverse-pulse filter cleaning system maintains filter efficiency
  • Easy-to-access side door allows quick filter changes with no tools needed
  • Integral regenerative blower conveys material without using plant air or a separate compressor
  • Handles up to 18,000 lbs/hr (8,186 kg/hr)


Vacuum Conveyor Options

  • 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)
  • Portable base increases installation flexibility
  • 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


Conveyor Specifications

Pneumatic Conveyor Specifications

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 16 & 20 Vacuum Conveyors |

Models 16 & 20

Model 36R Vacuum Conveyor |

Model 36R

Model 42 Vacuum Conveyor |

Model 42


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

Major/Minor Dry Material Vacuum Batching System

This conveying 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:


Bulk Bag Unloaders – Each is equipped with a 2-ton electric hoist and bag agitation for efficient material flow. The unloaders have load cells for the accurate, real-time measurement of material flowing out of the FIBCs (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.


Bag Dump Stations – Each of the minor ingredient stations have a 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.


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 side access door allows 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.

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.


Product Brochures
Product Brochure: Vacuum Conveyors
Corporate Brochure



  • FDA Compliant
  • Cleanability
  • Low Maintenance
  • Explosion Guard


See what our customers frequently buy with the Vacuum Conveyor

Bulk Bag Unloaders
Bulk Bag Fillers
Bag Dump Stations


Headshot of Hapman's Steve Grant

Contact: Steve Grant

Product Specialist
(269) 382-8223
Email Me


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