In industry, you can only work when your equipment does.
Why spend money on equipment that will let you down?
Discover why many consider us the most reliable airlock in the industry.

Quality. Precision. Dependability.
That's Progressive Valves.

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Progressive Rotary Airlock Valves
We offer heavy-duty, high quality, cast iron construction valves for use in pneumatic conveying and bulk material handling applications. The inner surfaces are precision-machined with tight tolerances to prevent tapering in the bore for a tight, effective air seal (for up to at least 15 PSI). Our factory set compression-type u-cup seal design requires no in field adjustments and are maintenance free, unlike standard packing-gland seal designs. All of our airlocks come factory equipped with relieved-tip rotors, metal drive guard construction, and tapped endplates - so a seal purge can be installed at any time.

We believe in providing the absolute best value for your investment, and most of our valves have a drop-in capability with competing airlocks.

We have our current selection of valves listed, but not all accessories.

We are always adding new products.
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