Heavy Duty Rotary Airlock Feeders for the Biomass Power Generation & Wood Processing Industries

Precision Machine & Manufacturing manufactures heavy duty rotary airlock feeders and screw conveyors engineered specifically for the extreme operating conditions found in biomass power generation. In biomass boiler feed, fuel metering, and ash handling systems, abrasive wood ash, fibrous and inconsistent fuels, elevated temperatures, and continuous duty cycles quickly expose the limits of standard equipment.

PMM components are built to withstand these conditions while maintaining reliable material flow and system integrity.

Precisely feed Biomass fuels into boilers or gasifiers.

Rotary Airlock Feeder w/ Shear Knife

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A heavy-duty metering airlock engineered for biomass power generation, featuring a hardened tool-steel knife to shear oversized fuel and prevent downstream jamming. Built to withstand extreme abrasion, high temperatures, and continuous operation, this rotary airlock provides unmatched durability and service life in biomass power plant operations.
Deliver large volumes of fly & bottom ash, carbon, lime

High-Capacity Rotary Airlock Feeder

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An extremely heavy-duty, high-capacity rotary airlock engineered for biomass power generation, built to move large volumes of abrasive, low-moisture fly and bottom ash under continuous, high-wear conditions.
Prevents material buildup and flow restriction

Self-Cleaning Rotary Airlock

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Engineered for sticky, cohesion-prone biomass and alternative fuels such as lignite coal, this self-cleaning rotary airlock prevents material buildup that leads to rotor fouling, flow restriction, and unplanned fuel-handling shutdowns in biomass and alternative fuel systems.
Engineered for abrasive ash, lime & carbon handling

Extremely Robust, Heavy-Duty Rotary Airlock

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In a category of its own, this heavy-duty rotary airlock features abrasion-resistant materials and industry-leading rotor-tohousing clearances to minimize air leakage and blow-by, delivering reliable performance with abrasive materials at extreme temperatures.
Engineered to minimize biomass fuel degradation

Side-Entry Rotary Airlock

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The offset inlet design allows this heavy-duty rotary airlock to gently handle biomass pellets of uniform size, minimizing pellet degradation, fines generation, and material loss during transfer.
Engineered for biomass fuel & ash handling

Extreme-Duty Screw Conveyors

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Engineered specifically for biomass power plant applications, PMM’s heavy-duty screw conveyors are built to match demanding operating conditions and outperform off-the-shelf augers under abrasive, high-load, and continuous-duty service.
Biomass Power Plant Material Handling & Replacement Components

Rotary Airlock & Screw Conveyor Solutions for
Biomass Power Plant Service

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  • Oversize Fuel Control at the Infeed PMM rotary airlock feeders are equipped with hardened tool-steel shear knives designed to control oversize and irregular biomass fuel before it enters boiler feed or pneumatic conveying systems. By shearing inconsistent material at the inlet, PMM airlocks prevent downstream jamming, rotor fouling, and feed interruptions common in biomass fuel handling systems.
  • High-Temperature Rotary Airlocks Built for Biomass Plants Biomass power plants operate across a wide range of elevated temperatures, from hot fuel streams to extreme ash discharge conditions. Every PMM rotary airlock is engineered for its specific operating environment, with thermal expansion precisely accounted for to maintain proper rotor clearances and reliable operation. Unlike off-the-shelf cast designs, PMM airlocks are built to operate under heat without binding, leakage, or premature failure.
  • Built for Diverse Biomass & Alternative Fuels Modern biomass power generation introduces highly variable fuel streams, including wood waste, agricultural residues, rubber, carpet fibers, and other alternative fuels. PMM rotary airlock feeders are engineered to handle this material diversity using abrasion-resistant materials and hardened wear components—delivering consistent metering to boilers, incinerators, and pneumatic systems with minimal maintenance.
  • Heavy-Duty Screw Conveyors for Biomass Fuel & Ash Handling Biomass power plants subject screw conveyors to extreme abrasion, high torque, and continuous-duty operation that quickly destroy standard augers. PMM manufactures heavy-duty screw conveyors engineered specifically for biomass fuel feed, reclaim, and ash handling applications. PMM screw conveyors are built with application-specific flighting, abrasion-resistant materials, and robust shafting to deliver reliable performance where off-the-shelf equipment fails.
  • Designed for Replacement, Retrofit & Long-Term Service! PMM material handling components are designed as drop-in replacements for existing biomass power plant equipment, minimizing outage time during retrofits or emergency replacements. All PMM rotary airlocks and heavy-duty screw conveyors are designed to be fully rebuildable, extending service life, improving lifecycle ROI, and reducing long-term capital costs for maintenance teams.
  • Ash Handling Under Extreme Wear Conditions PMM rotary valve airlocks and screw conveyors are purpose-built for biomass ash handling, including fly ash, bottom ash, and mixed ash streams. Manufactured from abrasion-resistant materials and surface-treated to achieve hardness levels approaching 60 Rockwell, PMM equipment delivers long service life in high-wear ash discharge systems where standard components fail.
  • Manufactured in the USA All PMM rotary airlocks, rotary valve airlocks, and heavy-duty screw conveyors are manufactured in the United States, providing consistent quality, shorter lead times, and direct engineering support for biomass power plant operators.