Rotary Airlock Valves

In many material handling systems, rotary airlock valves are essential for regulating the flow of a product while minimizing the loss of air or other fine materials. And while no valve is capable of creating a 100% seal, the rate of leakage is greatly reduced with the right design in place such as the valves manufactured by Carolina Conveying.

Carolina Conveying offers many different types of rotary airlock valves useful for a variety of applications, all offered at the highest quality standards.

To help you navigate the world of rotary airlock valves, we’ve put together a guide on the products we offer and how they can meet your demands.

Drop Thru Rotary Airlock Valves

If you need a rotor that will ensure tight tolerances and minimal leakage for the majority of applications, look no further than to the Drop Thru Rotary Airlock Valve. This is by far our most popular unit and is utilized anywhere from pneumatic conveying to dust collection systems. The Drop Thru Rotary Airlock Valve features heavy duty design castings for the body and end covers, while its robust construction uses thick vanes and large shaft rotors that are guaranteed to hold tight tolerances. Plus, the body, end covers, and rotor are precisely machined in a CNC
center for minimal clearances between the rotor and housing, adding even more durability and optimization. A wide range of sizes are available for the Drop Thru Rotary Airlock Valve — more so than any of our other products. There are also a number of rotor options to choose from, including open-end and closed-end, fixed and adjustable blades, scalloped pockets, quick release, along with many others.

Side Entry Rotary Airlock Valves

When product shearing is a concern for your application, trust the Side Entry Rotary Airlock Valve to eliminate the likelihood of shearing or jamming. Shearing occurs when the rotor vane meets the throat of a rotary airlock, pinching the area and causing the product to jam the valve. The Side Entry Rotary Airlock Valve’s v-shaped throat feature is designed to instead push products out of the way and prevent that from happening. Application usage varies from metering products out of silos and hoppers to feeding product into pneumatic conveying lines. This makes the Side Entry Rotary Airlock Valve great for plastics, pellets, regrind, and larger particles, and it’s offered in a wide range of sizes available for quick shipment.


Blow Thru Airlock Valves

Whether you’re dealing with positive pressure or vacuum systems, the Blow Thru Rotary Airlock Valve is uniquely designed for pneumatic conveying applications. The Blow Thru Airlock Valve has ports on the sides of the end covers which directly connect to the convey line pipe via compression couplings. This allows convey line air to blow through the rotor pockets, requiring less power consumption and providing more energy savings. It also
cleans the pockets. So say goodbye to outlet convey line adapters — this valve is both efficient and compact, and requires minimal installation space.


Easy Clean Rotary Airlock

Some applications require the implementation of a valve that can be disassembled quickly and
with ease. The Easy Clean Rotary Airlock features a quick-release rotor that can be removed without disconnecting the drive package, making it ideal for sanitary or food applications where the valve internals must be cleaned regularly. But it’s also useful for non-sanitary applications, like paint pigments, which require product change over. Round or square flanges ranging from sizes 6 through 12 are standard for the Easy Clean Rotary Airlock, but others may be accommodated as well. Additionally, once the valve has been pulled apart, optional side rails can support the rotor and end cover.

Standard Duty Rotary Airlock Valves

If you want the precision of a Heavy Duty Airlock but don’t want to pay the price, Standard Duty Rotary Airlock Valves are a less expensive alternative and are perfect for applications where a more robust valve isn’t required. The Standard Duty Airlock is cast iron with a mild steel closed end rotor, and has two main functions: for feeder applications with no pressure, or for filter applications where fine dust must be collected while maintaining an air seal. Some common uses include on the bottom of a dust collector, surge hopper or silo, and for handling dry, free flowing, non-abrasive materials.


Special Size Rotary Airlock Valves

We realize that everyone’s airlock needs are unique and that our standard sizes might not be what you’re looking for. That’s why we offer Special Size Rotary Airlock Valves ranging from rectangular units to larger bore bodies for increased capacity. Or, alternatively, you can check with us for customizable sizing options.

NFPA Design Rotary Airlock

A valve that meets or exceeds the NFPA 68 & 69 requirements is what you need for
deflagration isolation systems. And the NFPA Design Rotary Airlock is our most heavy duty valve yet. The NFPA Design Rotary Airlocks are available in sizes 6 to 24 inches and come with cast iron and stainless steel production. They also exceed the 6 vanes standard with 8, four of which are in contact with the housing at all times.