Rotary Airlocks (Rotary Valves)

rotary airlocks, rotary valve, rotary feederPrater’s Rotary Airlocks, sometimes referred to as Rotary Valves or Star Valves, are a type of rotary feeder. They provide both material handling functionality and an optimal “air lock” preventing air pressure loss at gravity feed to pneumatic feed transition points. Our Rotary Airlocks are used worldwide throughout a large variety of industrial and agricultural bulk and specialty material handling systems. We specialize in the design and manufacture of custom built rotary airlock valve products that can immediately improve the safety, reliability and efficiency of your feeding and metering operations compared to other rotary feeder brands.

Why choose a Prater Rotary Airlock Valve?

After years of engineering and manufacturing rotary airlocks, we consider ourselves proven experts on the various rotary airlock designs available to our customers. Prater understands that temperature, pressure, size and construction plays a very significant role in processing various materials, which is why all of our rotary valves are carefully machined for those unique specifications. Each of our rotary airlocks can be individually customized to your exact processing specifications to ensure an optimal a reliable, worry-free operation that meets your precise needs.

Our Rotary Airlocks have an innovative larger pocket design allows up to 50% more volume and enables the rotor to run at lower speeds than other manufacturers’ rotary feeder valves. Pair this with our exclusive self-adjusting packing glands and you have a rotary airlock valve feeder that provides minimum air leakage, a longer life, less maintenance and a higher return on your investment.

Other standard features such as our precision casting, CNC machining, compact design and universal mounting flanges allow for a versatile material handling air lock product that can fit virtually every existing bolt hole pattern and replace any existing rotary valve.

If you have a need for a metered rotary feeder, please consider the added “air lock” benefit of a Prater Rotary Airlock. We are confident that we can help improve your bulk material handling and conveying efficiency.

Contact Prater today and discuss your rotary airlock valve application with one of our airlock account managers. They can quickly help you select the best rotary airlock for your operation and customize with specific options to meet your processing requirement.

Keep up the pressure on your processing systems and competition with the help of a Rotary Airlock valve from Prater. We are dedicated to offering the highest-quality rotary airlock options to ensure the appropriate feeding, metering and control of materials.

Rotary Airlock Case Studies

Prater Rotary Airlock Products

Ceramic Series Airlock:

Our Ceramic Series Rotary Airlock is considered our most durable rotary valve as it is most frequently chosen to handle highly abrasive products.

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Dust Collector Series Airlock:

Our Dust Collector Series Rotary Airlock is a budget-friendly, economical rotary airlock feeder; choice for general use under dust collectors, cyclones and hoppers.

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Heavy Duty PAV Series Airlock:

Our Heavy-Duty (PAV) Series Rotary Airlock is an ideal rotary valve choice for handling many dry, free-flowing powders where a pressure differential exists.

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Quick Take Apart Series Airlock:


Our Quick-Take-Apart (QTA) Series Rotary Airlock was designed specifically for applications where frequent removal of the rotary valve internals is necessary such as “Clean in Place” systems.

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Quick Take Apart Series Airlock on Rails:

Our Quick-Take-Apart Rail Series Rotary Airlock has a unique design with three times more load capacity than most other manufacturers’ rotary feeder valves. The rail design protects the rotor from dropping in awkward locations and allows for quick reassembly to maximize up-time.

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