Rotary Shaft Seals for Rotary Air Valves

We offer a wide assortment of seals such as the OFCT Seal which is used for slurries, mixes, semi-solids, and dry powders in food applications. The 7500 Series is a must for bucket elevators, screw conveyors, and other bulk solid applications. If you’re looking for unmatched sanitary seals, the 7800 & 9700 seals are made from 304 Stainless Steel.

When it comes to regulating airflow from one chamber to another and maintaining great airlock condition, it’s the rotary airlock that gets the job done. Being in granular or powdered form, a great airlock system is necessary for bag and cyclone filter applications so dust can be maintained and collected. Rotary airlock systems go beyond household vacuum systems, as they’re also integral to the pneumatic conveying industry where such products are placed in a vacuum or pressure conveying line to minimize air leaks.

Rotary Air Lock Seals

Designed to replace rope packing on rotary air locks and is maintenance free due to its self-adjusting design. Custom seal housings are available in aluminum and stainless steel. The seals can be rebuilt with inexpensive repair kits.

How They Operate

With drop-through valves, the outlets and inlets are inline vertically and tend to be the same size. The metal blades (also known as vanes) of the rotary airlock valve will rotate as it is in operation. As this is happening, pockets begin to develop between them. The material that is being handled will then enter the pockets in the inlet port prior to rotating, within the valve, and exiting via the outlet port.

With airlock valves, the air will be sealed between the outlet and inlet ports. The materials inside will travel in the downward direction (via the valve) from inlet to outlet port as the airflow is restricted. This way the material can move continuously in the air between both ports. The vacuum or pressure difference is maintained in the valve to function properly.

The Rotary Airlock Valve Design

The pneumatic conveying system happens to be a more economical and practical method used when transporting a material from A to B (in comparison to other systems). Whether it be drag conveyors, vibrating conveyors, screw conveyors, belt conveyors or other methods of material movement,  pneumatic conveying systems edge out the competition.

Rotary airlock valves are economical to operate and install. They’re enclosed and have the ability to operate without the possibility of moving parts having contact with the product it’s handling. To top it all off, they’re flexible when it comes to expansion and rerouting. Essentially, any place a pipeline can operate, the pneumatic system is capable of conveying product.

Shaft Seal Types & CinchSeal Solutions

Old rotary shaft seals would consist of a food grade white packing or graphite rope inside of the compression housing, but the CinchSeal seal plate fits inside and offers more durability (with easy repair) in comparison to the competitors.

CinchSeal Benefits

The benefits that come with CinchSeal products are:

– They last five to six times longer when compared to conventional rope packing seals.

– They prevent damage to shafts, a common issue with other rotary airlock seals.

– They make accidents less frequent by eliminating leakage that leads to slips.

– They’re easy to repair and replace.

Contact us today so we can set you up with the CinchSeal you deserve!

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Rotary Shaft Seals