News
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Differential-Pressure Cycling in Liquid-Cooling CDU Filter-Housing Seals
Executive Summary A CDU filter-housing seal is not exposed to one static pressure value. It works at an interface where filter resistance, flow demand, pump transients, temperature and maintenance repeatedly change the local load. Filter loading can increase differential pressure, but high differ...Read more -
Immersion-Cooling Tank-Lid Seals: Liquid Immersion Resistance and Gas-Tightness Retention
Executive Summary Immersion-cooling tank-lid sealing must keep dielectric liquid inside the tank while also controlling the vapor space and long-term gas-tightness boundary. Prolonged fluid exposure can cause absorption, extraction, swelling, shrinkage, softening, hardening, tackiness and compres...Read more -
Seal Surface Transfer and Adhesive Wear: Mechanisms, Morphology and Reliability Control
Executive Summary Surface transfer and adhesive wear in rubber seals are interface-evolution problems, not simple material defects. They develop when seal compound, counterface material, contact pressure, speed, lubrication, temperature and contamination combine to create local adhesion and shear...Read more -
Thermal Runaway Pressure Relief in Battery Pack Sealing: Vent Paths, Seal Failure and Controlled Gas Management
Executive Summary Thermal-runaway pressure relief in battery-pack sealing is a boundary-management problem. Cell venting, module gas transport and pack-level discharge happen in different spaces, with different restrictions and time scales. A cell may vent successfully while the module or pack st...Read more -
Rubber Seal Failure Morphology Database: From Cracks and Extrusion to Media Swelling
Executive Summary Rubber seal failure morphology is evidence, not a conclusion. A crack, extruded edge, worn contact band, flattened cross-section or swollen surface describes the condition of the failed part, but it does not automatically identify the root cause. The same surface pattern may com...Read more -
Rubber Seal Trimming Quality and Cleanliness Control: Flash, Particles and Precision-Sealing Reliability
Executive Summary Rubber seal cleanliness is not produced by washing alone. It is established earlier, at the mold parting line, then preserved or damaged through trimming, cleaning, drying, packaging and assembly. Flash, trim chips, torn-edge fragments and residue are not cosmetic details when t...Read more -
Rotary Oil-Seal Eccentricity: Lip Contact Imbalance, Shaft Runout and Leakage Risk
Executive Summary Rotary oil-seal leakage under eccentric shaft motion is a dynamic contact problem, not a simple material-quality judgment. The sealing boundary is created by the rotary shaft, housing bore, seal case, primary lip, garter spring, oil side, air side and lubrication film. Static fi...Read more -
Entrapped Air and Bubble Retention in Sealing Grooves
Executive Summary Entrapped air in a sealing groove is not a simple filling nuisance. It is a boundary-condition error created when groove geometry, seal compression, filling path, vent access and surface wetting do not allow gas to leave before the interface becomes closed. The retained gas may ...Read more -
Dynamic O-Ring Sealing: Frictional Heat, Wear Particles and Service-Life Control
Executive Summary Dynamic O-ring sealing is a tribological problem, not a static compression problem with motion added afterward. The seal must maintain contact pressure while sliding against a shaft, rod, piston or sleeve. Frictional work is produced at the dynamic contact band, converted into l...Read more -
Low-Temperature Rubber Sealing: Glass Transition, Recovery Loss and Cold-Start Leakage
Executive Summary Low-temperature rubber sealing fails through coupled changes rather than one temperature threshold. Cooling reduces segmental molecular mobility, raises modulus and slows compression recovery before a visible leak. Near a glass-transition region, the response can depend strongly...Read more -
EPDM Volume Change in Ethylene-Glycol Coolants: Swelling, Additive Compatibility and Seal Stability
Executive Summary: Volume Change Is a System Response An EPDM seal in ethylene-glycol coolant is exposed to a multicomponent fluid, not glycol alone. Water, glycol, inhibitors, buffers, anti-foam agents, stabilizers, contaminants and oxidation products affect uptake, extraction, lubrication and s...Read more -
Hydrolysis Risk of PU Seals in Water-Based Media: Swelling, Hardness Drift and Long-Term Leakage
Executive Summary: The Failure Chain Is Longer Than Water Exposure A PU seal in a water-based medium does not fail through one isolated event. Water absorption begins at the exposed surface, water diffusion develops a concentration gradient through the section, and the medium chemistry determines...Read more