Sealing rings are precision-engineered components that prevent fluid leakage and maintain pressure integrity in piston and diaphragm assemblies.
Sealing rings are annular components designed to create a hermetic seal between moving or static parts in hydraulic and pneumatic systems. In piston/diaphragm assemblies, they prevent fluid or gas leakage across pressure differentials while accommodating relative motion, thermal expansion, and wear. These rings function by elastic deformation against mating surfaces, maintaining contact through spring force or system pressure.
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Static seals are used between non-moving surfaces and rely primarily on compression. Dynamic seals accommodate relative motion (reciprocating, rotating, or oscillating) and require special design considerations for friction, wear, and lubrication.
Material selection depends on fluid compatibility, temperature range, pressure, motion type, and environmental conditions. NBR is standard for petroleum-based fluids, FKM for high temperatures and chemicals, and PTFE for extreme chemical resistance.
Common causes include improper installation (twisting or cutting), excessive clearance gaps, incompatible fluids, temperature extremes beyond material limits, surface imperfections on mating components, and inadequate lubrication in dynamic applications.
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