ROTARY SEALS

What are Rotary Seals?

Rotary seals are seals that are used in rotary or oscillating applications. Their main purpose it to protect the bearing or an electrical motor that is used to support the shaft in rotating applications.  The seal prevents the lubrication media from escaping for bearings and protect an electrical motor from liquid intrusion. The seal increases the overall service life of the equipment.  The rotary seals are machined from proven profile designs to any metric or imperial diameter.   

How do Rotary Seals Work?

Rotary seals are used to close the gap between stationary and rotating system components. They work by sealing the system lubricant in—typically either oil or grease—between the lip and shaft. Simultaneously, rotary seals prevent leaks and contamination by excluding dust and liquid contaminates that will damage the lubricant or the equipment. The seal’s ability to protect the lubricant while excluding contaminates increases the service life of the equipment. Our PTFE rotary seals can be used in dry environments where no lubrication is available.  We suggest that you contact us to discuss the effect of surface speed and pressure on seal jacket material and design.  

Common Rotary Seal Types

Benefits of Rotary Seals

Some key benefits of rotary seals include:

Rotary Seal Materials

Rotary seals are available in a variety of materials that offer enhanced benefits to meet your particular needs and application. Some common materials for rotary seals include: 

PTFE

UHMWPE

PEEK

Rotary Seal Selection Considerations

When selecting and designing a rotary seal for its intended application, consider the following:

• Surface Speed (define RPM multiplied by circumference)

• Pressure

• Hardness of Dynamic Material Interface

• Surface Finish of Dynamic Material Interface

• Shaft Dynamic Runout

• Temperature (operating, minimum and maximum)

• Coefficient of Thermal Expansion (CTE)

• Media

• Lubrication (hydrodynamic boundary layer)

• Duty Cycle

Rotary Seal Applications

Rotary seals are an ideal choice for sealing applications across a variety of industries, including: