The Wrights Dowson Group is a leading provider of bulk handling equipment in the UK. Aside from screw conveyors and bin activators, we also manufacture rotary shaft seals to aid industries with high sensitivity to contamination.

Rotary Shaft Seals are installed to prevent liquids, fumes, or even air from intruding or escaping a contained conveyor with a rotating shaft. Due to the motion of the shaft, air-tight seals can be challenging to achieve. The seal aims to bridge the gap between the shaft and the remainder of the machinery.

Rotary Shaft seals can be essential in chemical, food, pharmaceutical and waste industries. In some cases, they are vital for keeping your staff safe from contaminants in the air. In other cases, they product material is damaged by moisture or bacteria.

How Rotary Shaft Seals Work

In the past, mechanical packing and lip seals were less effective solutions for sealing the product into bulk handling equipment. The design of these seals is over 100 years old. The problem with mechanical packing is that it frequently needs to be tightened to prevent any product from leaking out, which means they require more maintenance and attention.

Lip seals, on the other hand, often wore out and had to frequently be replaced. Whilst these designs prevented product leakage, they were also not entirely leak-free and often didn’t fully close the equipment against contamination.

Both designs had one major problem. They didn’t follow the rotation of the shaft when in motion. Cinchseal’s new rotary shaft seals work differently to solve this problem.

The seal turns with the shaft to prevent it from damaging the seal. Next, you install the new seal by pushing its inner flange to the surface of the equipment, where it will steady it and keep it in place. Then, a silicone elastomer and two rotor cups are placed around the shaft. Housing is then slid over the seal and shaft to keep everything in place and contained. Finally, this is tightened with screws.

The seal is then purged with air using a pressure regulator. Once in operation, the seal floats with the shaft and accepts the misalignment common to bulk-handling equipment.

Benefits of Using a Rotating Shaft Seal

The benefits of such a rotating seal are simple:

  • Leak and contamination-free
  • Easy to maintain and hard to wear
  • Better and faster ROI
  • Prevent downtime and equipment failure

The Wrights Dowson Group Chooses the Best Rotary Shaft Seals

As a trusted manufacturer of bulk handling equipment, we source our rotary shaft seals from Cinchseal to benefit from their patented technology. In addition, we work closely with customers to design conveyor systems that suit their exact requirements and applications.

Get in touch today for a quote, advice or support.