Shaft Seals for Rotary Airlock Valves

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Rotary airlock valves play a crucial role in many industrial processes, ensuring smooth airflow and metering of bulk materials from one tank or chamber to another. To minimize air leaks, a high quality sealing solution is needed. CinchSeal rotary shaft seals are designed to meet these demands, providing superior performance, reducing maintenance costs, and extending equipment lifespan.

Rotary Airlock Valve Seals

Rotary shaft seals by CinchSeal are designed to replace rope packing on rotary airlocks, and are maintenance-free thanks to their self-adjusting design. Custom seal housings are available in aluminum and stainless steel, and 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.