Heavy-Duty Rotary Valve Airlock Built for the Hard Stuff

NFPA-Upgradeable | Abrasion-Resistant | Engineered to be Rebuilt

PMM Rotary Valve Airlocks are engineered for demanding bulk material handling applications where abrasion, continuous operation, temperature, pressure differential, and difficult materials can cause conventional rotary valves to wear prematurely and lose performance.

Unlike conventional cast-iron rotary valves, PMM Rotary Valve Airlocks are manufactured using abrasion-resistant steel in the primary wear areas and incorporate a proprietary modular design that allows critical wear components to be repositioned, serviced, or replaced without replacing the entire valve.

Every PMM Rotary Valve Airlock is engineered for the specific material and application. Material characteristics, required throughput, temperature, pressure conditions, equipment above and below the valve, installation requirements, and operating environment are evaluated before the valve is sized and configured.

Abrasion-resistant by design. Engineered for long service life. Built to be rebuilt.

Engineered to Move the Most Abrasive Materials:

  • Cement, fly ash, lime, and mineral powders.

  • Plastic pellets, resins, pigments, and dry chemicals.

  • Grain, DDGs, and feed mill byproducts.

  • Outlasts Cast Iron Airlocks 3–5x: 100% Rebuildable! Proven track record of outperforming cast-iron.

  • Proven track record in high temperature applications up to 800 degrees.

  • Modular construction enables minimal downtime.

Contact PMM now to upgrade your material handling system with the industry’s toughest rotary valve airlock!

Key Features:

  • NFPA-Upgradeable: Configurable to meet NFPA 69 & 85 compliance if/when needed.

  • Abrasion-Resistant Steel Alloys: Surface hardness up to 60 Rockwell.

  • Precision Rotor-to-Housing Fit: Tight tolerances reduces air leakage and increase efficiency.

  • Unique Proprietary Modular Design: Minimizes downtime and enables quick onsite maintenance.

  • Outlasts Cast Iron Airlocks 3–5x: Proven durability in abrasive application.

  • Rebuild vs. Replace! Significantly lowers cost of ownership over the product’s lifecycle.

Industry Applications:

  • Cement & Aggregates: Clinker, limestone, kiln dust.

  • Power Generation: Fly ash, bottom ash, pulverized fuels.

  • Bulk Powder Processing: Soda ash, lime, calcium carbonate, pigments.

  • Grain & Feed Mills: Corn, soy, DDGs, pelleted material.

  • Plastics & Resins: Pellets, powder resins, and compounds.