LMC Cleaners are designed to handle a high production rate with great efficiency and effectiveness. We offer two types of seed and grain cleaners to maximize performance and flexibility to suit your needs. Both of our cleaners are precision cleaners with decks that are counterbalanced for minimal vibration.

Hi-Capacity Air Gap Cleaner

LMC’s revolutionary Air Gap Cleaner provides a new approach to the concept of upstream foreign material removal. Performing foreign material separation early in the cleaning process allows for increased efficiency by downstream processing equipment.

When receiving product, unload time is of the utmost importance. The high capacity LMC Air Gap Cleaner can receive large volumes of product, while simultaneously performing accurate and precise cleaning.

Detwiggers and sandscreens have been used for decades in precleaning applications. The LMC Air Gap Cleaner includes the use of these proven concepts in addition to the namesake “Air Gap” for stone removal and additional screening for loose shelled kernel, field meat, and/or additional sand removal. The inclusion of the “Air Gap” destoner allows for a significant reduction in stone and heavy foreign material volume therefore allowing downstream precision density destoners to perform more accurate separations.

With food safety concerns always increasing, removing the loose shelled kernels created in the field allows for a concentrated and independent processing line for at-risk product.

Options are available to customize each cleaner for maximum foreign material removal.

Variable Speed Roll Feeder

Product is fed utilizing a variable speed roll feeder to control flow to the cleaner. The roll feeder enables the operator to easily and accurately adjust product flow to fit any situation.

Stick Belt

The stick belt ensures that extruded foreign material maintains a parallel orientation with the four sections of poly screens and avoids reintroduction into the product flow. The quick change poly screens are available in nearly any size enabling optimum separation. Pneumatic lifts are included to provide easy access to the poly screens.


In the aspiration section of the air gap destoner, light foreign material liftings such as leaves, hay, small sticks, and pops are removed as a result of their lower density when compared to that of the acceptable product.

Expansion Chamber

The liftings go to an expansion chamber to allow the reject product to drop out of the air stream. The liftings are conveniently discharged via a screw auger for inspection and can provide insight as to whether or not an air adjustment is necessary.


Screen combinations, along with deck configurations, can be arranged to perform sifting and scalping operations on the same machine. LMC’s quick change screens are manufactured in 2-foot sections for easy changing.


Each machine is custom-designed to include a spouting configuration that matches each customer’s specific situation. Size, location, and orientation of spouts are some of the many modifications that LMC can incorporate into the machine’s design in order to accommodate unique separations or space constraints.


The Air Gap Destoner is designed to lift the acceptable product across the air gap. The heavier foreign material, such as stones, heavy dirt balls, and metal will fall through the air gap and out of the product flow.

Ball Tray

LMC’s unique ball tray design gives the 2-inch ball used for cleaning screens unprecedented random action, and has proven to be far superior to the woven wire systems found in other machines. All ball trays are manufactured in 2-foot long removable sections for easy clean out when sanitation is a high priority.


It is essential for product to be properly distributed to the screens in order for optimum separation to occur. If the product is too deep, it cannot be adequately presented to the screens for separation. In most cases, the siftings are generally lighter than desirable product. A deep product flow compounds the sifting process, thus causing the lighter siftings to migrate to the top of the flow as it travels down the vibrating deck. Increased screening area ensures adequate product contact allowing for greater screening efficiency. With this knowledge in mind, LMC manufactures the Air Gap Cleaner in four different widths to ensure that each customer’s capacity requirement is met.


ADVENT Cleaner

The ADVENT utilizes the aspirator before the screening process to attain unmatched screening accuracy. This aspirator has proven to be the most efficient aspirator available and is used in many different processing industries. It is designed to create a streamlined flow vacuum that is drawn through the product. As the air flow is evenly distributed, the separation is more easily controlled and more accurate. An absence of a controlled flow will result in leaving light material in the good product or, if operated aggressively, heavy, good product in the liftings. As the clean product is discharged from the aspirator, it is gently lowered to the top deck of the ADVENT to begin the sizing process. The liftings are conveniently discharged for inspection and, if needed, adjustment to the air stream can be made.


To keep the screening section from becoming an expensive conveyor, the product must be properly distributed to the screens. If the product depth is deep, the product cannot find the screen to separate. In most cases, the siftings are generally lighter than the good product. A deep product flow compounds the sifting process, as the lighter siftings will migrate to the top of the flow as it travels down the vibrating deck. To gain capacity and to overcome this piggy-back ride of the siftings, the LMC ADVENT is much wider than the conventional cleaner. ADVENTS are manufactured in widths of 4, 5, 6 and 7 feet to provide this required spread for the desired capacity. Sizing technology dictates width for capacity and length for precision. That is why each machine is designed with decks up to 7 feet wide and 16 feet long. if extra precision is required for a difficult separation, the decks can be designed with more length to attain the proper separation.

ADVENT Variable Speed Roll Feeder

The product is fed using a variable speed roll feeder controlling the flow to the intake aspirator. The roll feeder enables the operator to easily and accurately adjust the flow to fit each individual situation.

ADVENT Ball Tray

Screen blockage is prevented by using 2” rubber balls. Over 40 years ago, LMC tried the woven type ball racks like those used by others. LMC found the relatively flat surface of woven ball racks did not give the proper aggressive, random action to the cleaning balls, so LMC developed a special system using round rods to impart the required action to the cleaning balls.

ADVENT Screening

While the screen configuration can be designed to any particular need, the first screening is normally a sifting process to remove the smallest reject particles. After the initial sifting the product rides to the scalping area of the top deck. A draper curtain is used over the scalping screens to prevent the sticks, pods, or any oversized particles from standing on end and passing through with the good product. After leaving the scalping screens, the product is gently discharged to the lower deck. This deck will precisely grade the product to any particular count and can be equipped with multiple discharges to satisfy production specifications. All screens are mounted on tubular steel frames 24″ wide and are easily handled.

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