Encapsulated O-rings

FEP, PFA or PTFE Encapsulated O-rings consist of a Viton® (FKM) or Silicone (VMQ) rubber core with an fluoroplastic-encapsulation. The elastomeric core offers great resilience while the fluoroplastic encapsulation protects the core from chemical and thermal attack. Encapsulated rings are a great cost effective alternative to FFKM O-rings.

Suitable for

  • Static and light dynamic applications.
  • Applications that require a high level of chemical resistance.

Not suitable for

  • Small cross sections >1.5mm.
  • Applications where a low closing force is available.

Advantages

  1. High chemical resistance
  2. High temperature range
  3. Low friction
  4. No stick slip effect in dynamic applications
  5. Can be used as retrofit in standard O-ring grooves

How do Encapsulated O-Rings work?

Encapsulated O-rings work the same as regular O-rings. An O-ring is an elastic part placed between two parts and then squeezed to fill up the gap between the two parts. When placed under pressure, the ring is forced to “flow” within the groove toward the clearance gap. As the ring flows against the gap, it produces zero clearance and prevents the sealed substance from escaping. The difference between a regular O-ring and a Encapsulated ring is the fact that the encapsulation brings improved chemical resistance, but the ‘compression set’ or memory of the seal is lower.

Technical Specifications

Movement type

Static, Light dynamic

Available sizes

Any size available upon request.

Temperature range

Silicone + FEP:    -60° to +200° C

Silicone + PFA:    -60° to +260° C

FKM + PTFE:        -60° to +200° C

Pressure range

≤ 100 bar

Available materials

NBR, EPDM, FKM, CR, FVMQ, HNBR, FFKM, PU, VMQ

Available compliances

KTW, USP, NSF 51 61, WRC, WRAS, FDA, R67 01

Available standards

AS 568A, DIN 3701, BS 1806/ BS 4518, JIS B2401, JIS NFT47-501, SMS 1568 en ISO 3601.

Encapsulated O-ring types

FEP ENCAPSULATED SILICONE (VMQ)

The most commonly used encapsulated seal type. The silicone core provides resiliency, while the FEP encapsulation offers chemical protection and great thermal resistance.

Advantages

  • High chemical resistance
  • Broad temperature range
  • No stick slip effect

 

 

PFA ENCAPSULATED SILICONE (VMQ)

The silicone core provides resiliency, while the PFA encapsulation offers chemical protection and great thermal resistance.

Advantages

  • High chemical resistance
  • Broad temperature range
  • Improved heat resistance
  • Low gas permeation

 

FEP ENCAPSULATED SILICONE (VMQ) HOLLOW CORE

The hollow core of this encapsulated seal type allows successful sealing with less compression force. Excellent for use in low pressure applications and applications where low sealing force is available. 

Advantages

  • High chemical resistance
  • Broad temperature range
  • No stick slip effect
  • Low closing force

 

PTFE ENCAPSULATED FKM

The PTFE encapsulated FKM O-ring has superior chemical properties, very low permeability and low friction coefficient. The PTFE encapsulations offers longer lifetime in comparison to FEP/PFA

Advantages

  • High chemical resistance
  • Broad temperature range
  • No stick slip effect
  • Improved friction coefficient

 

Contact Us

We believe in the quality of our products and service. Fill out the form and one of our skilled engineers will contact you within the next business day.

Contact details

  •  +31 (0) 226 362 233
  •  info@newdealseals.com
  •  Energiestraat 2-5, 1749DN Warmenhuizen, Nederland

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