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Bonded Seals

Bonded seals, a reliable solution to fix problems with static sealing

The bonded seal is a combination made up of a metal washer and an elastomer lip stuck to the metal element by means of vulcanisation.

The metal washer (made of galvanised steel or stainless steel) makes sure that the connecting components stay safely fastened together. The thickness of the washer limits the compression of the elastomer lip (NBR or FKM/Viton®) and thus avoids excessive tightening being exerted on the seal. This is how it ensures a tight seal. The internal pressure increases the plugging force when the sealing lip is activated. The bonded seal is available in various formats, normal and self-centring.

Bonded seals, metal washer

Bonded SealsProfileMetal supportMinimum explosion pressure Application Check stock
NormalMetal-Buna NormalAISI1008-10101 Galvanised Steel540 MN/m2General
Self-centringMetal-Buna AutocentranteAISI1008-10101 Galvanised Steel540 MN/m2General
NormalMetal-Buna NormalSS316L/SS304L Stainless Steel540 MN/m2Corrosion protection in extreme conditions
Self-centring Metal-Buna AutocentranteSS316L/SS304L Stainless Steel540 MN/m2Corrosion protection in extreme conditions

Bonded seals, elastomer lip

PartElastomer materialClass of polymerResistant toAggressive to
Bonded sealNBRAcrylonitrile Butadiene, Buna-NOils, greases, hydraulic fluids, chemical products, large variety of hydrocarbonsOzone, ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.
Bonded sealFKM/VITON®Fluorocarbon rubberIncreased resistance to fluids compared to other elastomers. As well as all aliphatic, aromatic, and halogenated hydrocarbons, acids, animal and vegetable oils.Ketones, alcohols, and esters with low molecular weight and components with nitrogen.