O Rings PTFE Encapsulated O-Ring

O Rings PTFE Encapsulated O-Ring

The o-rings that we offer are flexible in terms of their use, being completely interchangeable with the standard offering of elastomeric o-rings. Due to the FEP sheath they are less flexible than you would find with the normal o-rings and the elastic nature of those, they have a limited level of stretch and a higher permanent deformation. All of this means is that when you are fitting an FEP o-ring you may need auxiliary tools in order to maximise the efficiency of the fitting process

Telfon, Silicone and FKM Encapsulated O-Rings with FEP or PFA are designed to address the growing problem of sealing in the most hostile chemical and temperature environments. TFE-O-SIL combines the best qualities of two materials, FEP or PFA on the outside with its chemical inertness and an elastomer on the inside for resilience. This unique combination forms a highly effective, long lasting seal for the most demanding applications.

O Rings PTFE Encapsulated O-Ring

Silicone FEP O Rings

FKM EncapsulatedPTFE o-ring

Description

FEP is a thermoplastic material with properties similar to PTFE. O-rings which are seamlessly coated with FEP have an elastic core made from FPM or VMQ and are used if very high thermal or chemical loads are present. The high chemical resistance of the coating protects the core against damage by the potentially aggressive medium.

FEP coated O-rings are used – similar to PTFE-rings – where the chemical resistance of the normal elastomer O-ring is no longer sufficient, but where a certain elasticity is needed. The elasticity is ensured by the inner ring and the chemical resistance is achieved by the seamless FEP coating.

Applications

FEP coated O-rings are perfectly suited for the chemical and petrochemical sector, medical technology, food sector, water and waste water technology and similar industrial applications. A typical application for FEP coated O-rings is the sealing of valve stems and as a secondary sealing element for slow switching and rotary movements.

Properties

·Very good chemical resistance against most liquids and chemicals

·Temperature range from approx. –60 °C to 200 °C [depending on inner ring material]

·No contamination of food, pharmaceutical or medical products

·Physiologically harmless, can be sterilised

·Sufficient elastic behaviour

·FEP O-rings can be replaced with standard O-ring seals without limitation

·No changes to the groove dimensions are necessary

·The O-rings are less flexible than elastomer O-rings due to the FEP coating. They can only be stretched minimally and have a lower elasticity or a higher permanent deformation