Rotary Airlock Valves

Rotary Airlock Valves minimize air pressure loss and increase efficiency.
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Rotary Airlocks

Prater 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 valves that can immediately improve the safety, reliability, and efficiency of your feeding and metering operations while minimizing pressure loss compared to other rotary valve brands.

Our standard features include:

  • Precision machined, heavy-duty castings that offer long life and minimal air loss
  • Oversized Universal Flanges allow our airlocks to match up to existing square or round bolt hole patterns
  • Compact design for an easy fit in new or existing installations
  • True size opening for maximum pocket filling efficiency
  • Standard 8 vane rotor that feeds smoother and maximizes the air seal design that is machined to your specified operating temperature
  • Outboard mounted bearings to reduce deflection and improve access to the shaft seals
  • Self-adjusting packing glands compensate for break-in and normal wear to packing seals
  • Sealed-for-life and permanently lubricated bearings which eliminate the need for bearing maintenance
  • Can comply with NFPA-69, MSHA, and CSA standards if specified

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


Dust Collector Rotary Airlock

Dust Collector Series Rotary Airlock Valve

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

Heavy Duty PAV Rotary Airlock

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.

Quick Take Apart Airlock

Rotary Airlock Valve

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.

Quick Take Apart Series on Rails

rotary airlock valve 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.

Abrasion Resistant Rotary Airlock Valves

Our abrasion resistant rotary airlock is considered our most durable rotary valve and is your solution to rotary airlock valves that constantly wear out in high abrasive applications.

Blow-Thru Rotary Airlock Valve

Blow Thru Airlock

The Prater Blow-Thru Rotary Airlock Valves are designed and manufactured specifically for applications that require discharging into a pneumatic conveying line. These Airlocks are ideal for free-flowing materials that require some assistance in clearing the rotor vane pockets.

Why choose a Prater Rotary Airlock?

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

Our airlocks have an innovative larger vane pocket design that allows up to 50% more volume which enables the rotor to run at lower speeds than other manufacturers’ rotary airlock and valve feeders. Pair this with our exclusive self-adjusting packing glands and you have a rotary airlock valve 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 rotary airlock valve product that can fit virtually every existing bolt hole pattern and replace any existing rotary valve.

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

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

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