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During long-term high-speed operation, the chamber sealing ring of a centrifuge not only ensures effective sealing protection, but also directly impacts equipment safety and service life. However, traditional welded sealing structures have gradually revealed several limitations in real-world applications.

Root Causes of Failure in Traditional Welded Sealing Rings

Fatigue Fracture Caused by Stress Concentration
Welded structures inherently contain joint seams. Under continuous vibration and centrifugal force during high-speed rotation, these areas become stress concentration points. Repeated cyclic loading leads to material fatigue, eventually resulting in cracks or breakage.

Structural Failure Due to Thermal Expansion and Contraction
In refrigerated centrifuges, chambers undergo repeated temperature cycling between low and ambient temperatures. Due to structural discontinuity at the weld seams, uneven thermal stress can generate microcracks, accelerating aging and embrittlement of the sealing ring.

Uneven Sealing Surface Leading to Local Overload
Weld seams affect the fit between the sealing ring and chamber, resulting in uneven stress distribution. During operation, certain areas endure higher pressure or friction, leading to premature wear and eventual failure.

Accelerated Degradation from Chemical Corrosion
Welded joints are more susceptible to penetration by corrosive media. Exposure to organic solvents or acidic/alkaline environments can degrade rubber structure, reduce elasticity, and significantly increase the risk of failure.

Installation Instability Causing Hidden Damage
Irregular interfaces in welded structures may lead to twisting or uneven stress during installation. These minor initial defects can progressively worsen during operation, ultimately causing sealing failure.

Welso Upgrade Strategy: Solving Failures at the Source

To address common industry issues such as “frequent breakage, unstable sealing, and short service life” of welded sealing rings, Welso has implemented a comprehensive upgrade to the centrifuge sealing system:

Eliminated welded structure design to remove stress concentration and structural weak points at the source

Introduced high-temperature and high-pressure molding technology for fully integrated one-piece manufacturing

Optimized material selection with high-performance rubber resistant to extreme temperatures and corrosion

Improved dimensional precision and compatibility to ensure uniform stress distribution and tight chamber fitting

Through both structural and material innovation, these upgrades effectively resolve issues of aging, cracking, and sealing failure associated with traditional designs.

Key Advantages of One-Piece Molded Sealing Rings

Seamless Structure for Enhanced Durability
Fully molded without joints or seams, eliminating stress concentration and significantly improving fatigue resistance and lifespan.

More Stable and Reliable Sealing Performance
A continuous sealing surface ensures tight contact with the chamber, effectively preventing liquid leakage and aerosol escape while minimizing cooling loss.

Superior Chemical Resistance and Anti-Aging Performance
Made from high-performance elastomers (such as FKM and EPDM), maintaining stability under harsh chemical conditions and temperature cycling.

Easy Installation and Lower Maintenance Costs
Uniform structure reduces deformation and misalignment, simplifying installation while decreasing replacement frequency and equipment downtime.

Enhanced Safety Protection
Prevents risks such as sample leakage, equipment corrosion, and contamination caused by sealing ring failure, ensuring safer operation for both users and laboratory environments.

Welso Upgrade Commitment

Welso has progressively completed the upgrade of its centrifuge sealing systems.
Moving forward, all product lines will fully adopt high-temperature, high-pressure molded one-piece sealing rings, continuously delivering safer, more reliable, and more durable solutions to users.