Gaskets & seals.
Fluid containment.
Leak-tight.
Gaskets and seals reference. O-rings, flat gaskets, lip seals, mechanical seals. Material selection, surface finish, design considerations.
Key principles.
AS568 standard
Standard sizes per AS568. Wide application range.
Compressed
Gasket between flanges. Compressed for sealing.
Rotating shafts
Spring-loaded lip seal. For rotating shaft seals.
Pumps
Rotating mechanical seals. Pump shaft sealing.
Oil-resistant
Standard oil-resistant. Fuel hoses, hydraulic.
Premium
Chemical + heat resistant. Premium applications.
FAQ
Material selection?
NBR oil. EPDM water/weather. Viton chemical/heat. Silicone temperature range.
O-ring vs flat gasket?
O-ring: round cross-section in groove. Flat: between mating flanges. Different applications.
Surface finish for sealing?
Ra 0.8-1.6 µm typical. Smoother seals better but wears faster (dynamic).
Static vs dynamic?
Static: stationary mating. Dynamic: rotating/sliding. Different design rules.
Compression range?
15-30% O-ring compression. Higher = better seal but accelerated wear.
Compression set?
Material recovery. Lower = better seal life. Silicone, Viton best.
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