Circumferential Seals
Circumferential seals are designed to minimize the leakage of fluid or gases by either sealing directly against the shaft or by using a closely controlled clearance with the rotating shaft or other moving parts which creates an energy efficient seal.
Circumferential seals also have a longer lifespan and require less maintenance compared to traditional mechanical seals.
Seal Types
Windback
When working with “oil-free” rotary screw compressors or any other oil-free rotary machines, our windback seals are ideal.
FEATURES
- Zero power dissipation
- Windback seal utilizes shaft boundary layer to seal process oil or gas.
- Gas purge option.
- Typical uses include vacuum pumps, blowers, compressors, and other rotating equipment
Carbon Solid
Carbon solid seals are an ideal long-term solution for a variety of applications and industries.
FEATURES
- Retainer utilized for axial sealing inside the groove.
- Non-contacting, segmented,self-aligning carbon rings for controlled leakage.
- Face load 50-75% less than spring seal
- Short axial length
- Reduced friction on seal face lowers heat and wear resulting in longer seal lifespan
PARAMETERS
- Pressure: Vacuum to +290 psi abs
- Temperature: -184 ̊F to +400 ̊F
Carbon Split
The carbon split seal, which splits into two halves for easier replacement, is an easy-to-install, long-term solution for a number of industries.
FEATURES
- Retainer utilized for axial sealing inside the groove.
- Split housing for easy installation
- Non-contacting, segmented, self-aligning carbon rings for controlled leakage.
Parameters
- Pressure: Vacuum to +290 psi abs
- Temperature: -184˚ F to +400˚ F
- Speed
Carbon Floating
Our carbon floating seals are a dependable option in instances when mechanical seals reach their limits.
FEATURES
- Retainer utilized for axial sealing inside the groove.
- Non-contacting, segmented, self-aligning carbon rings for controlled leakage.
Parameters
- Pressure: Vacuum to +290 psi abs
-
Temperature: -184 ̊F to +400 ̊F
-
Speed
Custom solutions
While OEM seals suffice for some applications, many use cases require custom sealing solutions.
Whether you need a seal that meets specific performance requirements or can withstand extreme operating conditions, Ergoseal offers the in-house design and rigorous testing expertise to ensure your custom seal meets your precise specifications and performs in even the most demanding environments.
Frequently Asked Questions
How do circumferential seals compare to traditional mechanical seals?
Circumferential seals typically have a longer lifespan and require less maintenance than
traditional mechanical seals. The non-contacting design reduces friction and wear, resulting in greater reliability and extended service life.
What types of circumferential seals does Ergoseal offer?
Ergoseal provides multiple circumferential seal types, including windback, carbon solid, carbon split, and carbon floating seals. Each design serves specific performance needs and application requirements.
What are the main features of carbon solid circumferential seals?
Carbon solid seals use non-contacting, self-aligning carbon rings for controlled leakage and reduced friction. This design lowers heat and wear, extends seal life, and maintains performance across a wide pressure and temperature range—from vacuum to +290 psi and -184°F to +400°F.
Does Ergoseal provide custom circumferential sealing solutions?
Yes. Ergoseal designs custom circumferential seals for applications with unique performance requirements or extreme operating conditions. Every custom seal is engineered and tested in-house to meet precise specifications and ensure dependable performance.

