What is PFA seal?

The seamless casing is composed of FEP (fluorinated ethylene propylene) or PFA (perfluoroalkoxy-copolymer). It ensures reliable sealing and high resistance to aggressive media. This produces performance similar to that of a PTFE ma- terial.

What is Viton seal?

A Viton™ seal is simply a seal manufactured from Viton™. These seals or gaskets are commonly used to seal leaks, valves, pumps and similar. Viton™ o rings are the most common type of seal, which we provide here at NES in a variety of sizes and profiles.

Is Viton and PTFE the same?

Viton vs Teflon (PTFE) – Viton offers a greater temperature resistance but falls short of Teflons(PTFE) chemical resistance. Also, Teflon is slightly less thermally resistant but offers much more in the way of non-adhesive properties.

What is an encapsulated seal?

Encapsulated O-rings are specially developed seals which solve a common problem in many industries. The outer jacket is made from Teflon, giving the seal high thermal stability and resistance to corrosion, while the rubber inner ore provides compressional and elasticity.

What is the difference between PTFE and PFA?

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. The most widely known PTFE formulation is sold under the brand name of Teflon®. PFA has very similar properties to PTFE, though the biggest difference between PTFE and PFA is that PFA is melt-processed.

What is PFA material?

PFA (perfluoroalkoxy) is a tough, flexible fluoropolymer that is used for flexible tubing and fluid processing equipment when chemical resistance, high purity, and low stiffness are required.

Is Viton fuel proof?

With exceptional chemical resistance, Viton® offers swell resistance in high octane and oxygenated fuel blends. This gives Viton® superior performance abilities in Ethanol/Methanol blended gasoline applications.

Are Viton O-rings fuel resistant?

Viton® O-rings from Parker offer excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics and many organic solvents and chemicals—making it excellent for O-ring, gasket and seal materials.

What is the difference between Viton and Buna O-rings?

Viton is the choice over Buna for high-temperature applications. Viton seals hold indefinitely at temperatures up to 400°F and can last up to 48 hours at temperatures up to 600°F. Buna is effective to 250°F. Viton offers universal chemical resistance for sealing applications for oils, fuels, and mineral acids.

Is Viton plastic or rubber?

What is Viton®? Viton® is a brand name of DuPont for its synthetic rubber and fluoropolymer elastomer, commonly used in O-rings and other moulded or extruded products.

What is FEP O ring material?

FEP encapsulated O-rings comprise of an elastomer core which has been seamlessly encapsulated in a jacket of Teflon® fluoropolymer. The core is either Viton ®, Silicone or EPDM. The jacket is FEP or PFA.

What is FEP material?

FEP (fluorinated ethylene propylene) is a tough, flexible copolymer of tetrafluoroethylene and hexafluoropropylene. It is often used for flexible tubing and fluid processing equipment when chemical resistance, high purity, and low stiffness are required. FEP has outstanding electrical properties and UV resistance.

How are FEP / PFA encapsulated silicone and Viton rings?

Carefully monitored in-house production and multiple levels of electronic inspection ensure high product quality and reliability. An Encapsulated ‘O’-Ring is an ‘O’-Ring bound by a seamless and uniform FEP/PFA encapsulation, which encloses an elastomeric core, completely protecting it from the media.

What kind of shell is used for Viton Teflon?

(PFA Hollow Silicone CPD# T1022) (FEP Hollow FKM T1023) (PFA Hollow FKM T1029) O-Ring with a FEP PTFE outer layer encapsulating a Solid FKM (Viton®) core. The PTFE shell offers excellent chemical and temperature resistance while the FKM core provides the resiliency needed to provide effective sealing.

Who are the leading manufacturers of FEP / PFA seals?

Vulcan Seals is a leading manufacturer of FEP/PFA Encapsulated ‘O’-Rings and Seals globally. We have the capacity to produce virtually any cross-section and diameter size or shape of seals, backed by a Stock Guarantee on the most common items and a short lead time on the rest.

How big is FEP encapsulated silicone Viton Teflon?

Readily available is common USA and metric cross-sections and nearly unlimited diameters. CPD# T1002 is FEP encapsulated Solid Silicone up to +500o F depending on application. PFA type PTFE CPD# T1027 up to +575o F depending on application. O-Ring with a FEP PTFE outer layer encapsulating a Hollow Silicone core.