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
The entire product range at a glance
FFKM, FKM, FEP and PTFE with temperature ranges, hardnesses and approvals, compact in one PDF. Over 200,000 sizes available, 30,000 of them from stock.
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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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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