FEP · encapsulated · NH O-RING
FEP-encapsulated
O-rings
An FEP jacket around an elastic FKM or silicone core: near-universal chemical resistance with the restoring force of an elastomer.
FEP-encapsulated O-rings combine the resistance of a thermoplastic with the sealing force of an elastomer. Ideal where FKM or silicone alone reach their limits.
Key properties at a glance
The most important technical data at a glance. Exact values per compound in the data sheet.
Temperature
−60/+205 °C
depending on core
Hardness
90
Shore A
Density
2.15
g/cm³
Shelf life
15 years
as stated
Types and compounds
The available compounds of this material with their key data.
Product range flyer 2026
PDF download (German)
The entire product range at a glance
All 16 compounds in FFKM, FKM, FEP and PTFE with temperature, hardness and approvals, plus certificates and service on six pages. Click a compound to open its data sheet.
Strengths
Near-universal resistance
The FEP jacket withstands practically all media, similar to PTFE.
With restoring force
An elastic FKM or silicone core provides lasting sealing force.
FDA-compliant
For applications with food and media contact.
−60 to +205 °C
Usable down to −60 °C with a silicone core.
Standards and conformity
REACH-compliant
Complies with the EU chemicals regulation REACH.
RoHS-compliant
Free from substances restricted under RoHS.
Individual dimensions
FEP-encapsulated O-rings are not toleranced to ISO 3601 but designed per application.
Data sheets and technical tools
All technical documents for design and reference, free and without registration.
O-ring data sheets
Temperature, hardness, density and approvals by material.
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O-ring size tables
Look up standard sizes and dimensions.
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O-ring resistance
Check media resistance by material.
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O-ring tolerances
Read off dimensional tolerances per ISO 3601-1.
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O-ring groove calculator
Design the housing and groove reliably.
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O-ring glossary
Terms and fundamentals explained clearly.
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Looking for FEP O-rings?
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Over 200,000 O-ring sizes available
30,000 sizes from stock, 5,000 of them in FFKM
No minimum order quantities and no tooling costs
Expert advice and service within 30 minutes
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