FKM X-Ring -75 Shore A

This is an X-Ring Seal engineered for medical centrifuges. It is fabricated from FKM material. It presents as a pure black annular rubber component. It has a symmetric X-shaped cross-section (dual-sealing lip structure). The lip contours are smooth and regular. An arc-shaped positioning groove is reserved on the outer ring for installation compatibility. The inner ring forms a smooth, flat circular surface. It tightly fits the surface of the centrifuge rotating shaft. Its hardness is 75±5°. It has high dimensional precision. It meets the assembly requirements of rotating shafts, chambers, and rotor central shafts in medical centrifuges.As a critical sealing component for clinical laboratory equipment, it complies with the stringent criteria of Medical Device Seals and Medical Grade Silicone Seals. It is fully compatible with the application specifications of Sterile Medical Seals and medical silicone seal.

Product Features

1. Functions

1)Dynamic Sealing Protection for Medical CentrifugesIt is precisely nested in the mating gaps between the centrifuge rotating shaft and chamber. It is also nested in gaps between the rotor central shaft and related components. It achieves dual sealing via the X-shaped double-lip structure. This blocks leakage of sample liquids and buffer solutions. It prevents external contaminants from entering the centrifuge interior. It protects precision components. It maintains sample purity. This sealing performance meets the rigorous demands of Medical Seals and Silicone Medical Components for medical laboratory equipment.

2)Adaptation to High-Speed Rotation ConditionsThe combination of the X-shaped structure and 75±5° hardness ensures stable sealing morphology. It maintains stability even under high-speed rotation ranging from 5,000 to 30,000 rpm. It transmits centrifugal force. It avoids sealing failure caused by high-speed friction or centrifugal stress.

3)Auxiliary Positioning and AssemblyThe arc-shaped positioning groove on the outer ring can be precisely embedded into the centrifuge mounting slot. It prevents the seal from shifting during high-speed rotation. It ensures continuous and reliable sealing.

 

2. Performance Characteristics

1)FKM Material + 75±5° Hardness for High-Demand Medical ScenariosFKM boasts exceptional temperature resistance. It withstands the thermal cycles of centrifuges from -20℃ to 200℃. It has excellent chemical resistance. It is compatible with common medical media such as sample liquids and buffer solutions. Combined with 75±5° hardness, it retains sufficient elasticity. It fits sealing surfaces tightly. It offers deformation resistance at the same time. It maintains stable sealing morphology under high-speed rotation and intense centrifugal force.

2)X-Shaped Double-Lip Structure for Enhanced Sealing ReliabilityThe symmetric X-shaped cross-section with dual sealing lips increases the sealing contact area compared to conventional O-rings. It delivers dual-layer sealing protection. This significantly improves the anti-leakage reliability for sample liquids. It meets the high-purity requirements of medical sample processing. This structural advantage aligns with the standards of General Medical Sealing and Basic Components and high-reliability medical equipment accessories.

3)High-Dimensional Precision + Positioning Groove for High-Speed Assembly CompatibilityIts dimensional precision matches the assembly tolerances of centrifuge rotating shafts and chambers. The arc-shaped positioning groove on the outer ring enhances the fit tightness with the mounting slot. It eliminates the risk of displacement during high-speed rotation. It improves assembly compatibility and stability.

4)Medical-Grade Safety for Sample-Contact ScenariosThe FKM material is non-toxic. It is free of extractables. It complies with material standards for medical device contact. It can be safely used in scenarios involving biological samples and reagents. It poses no risk of sample contamination. It satisfies the safety requirements of Medical Vial Cap Seals and sample-handling medical devices.

 

3. Application Scenarios

1)High-Speed Medical CentrifugesIt is suitable for dynamic sealing of rotating shafts, chambers, and rotor central shafts in laboratory high-speed centrifuges and ultracentrifuges. It is applied in sample processing scenarios such as cell separation and protein purification.

Medical Sample Processing EquipmentIt is used as a sealing component in blood centrifuges and nucleic acid extraction centrifuges. It ensures leakage prevention and sample purity.

2)Research-Grade Centrifugal EquipmentIt is employed for dynamic sealing in analytical and preparative centrifuges in scientific research laboratories. It meets the experimental requirements of high rotation speed and high sample purity.

 

4. Pain Point Solutions

1)Solving Sealing Failure Under High-Speed RotationConventional O-rings are prone to deformation and leakage due to centrifugal force and friction at high speeds. The structural design and FKM material of this X-ring seal enable stable sealing even at 30,000 rpm. It prevents sample leakage.

2)Eliminating Sample Contamination and Leakage RisksOrdinary seals may leach impurities to contaminate samples. They may fail to seal reliably, leading to sample leakage. The medical-grade safety of FKM and the X-shaped double-lip structure ensure sample purity. They ensure leakage prevention at the same time.

3)Resolving Displacement Issues During High-Speed OperationStandard seals lack positioning structures. They tend to shift and fail under high-speed rotation. The outer arc-shaped positioning groove of this seal enables precise embedding into the mounting slot. It eliminates displacement risks.