SWKS Seal, with over 10 years experience, is one of the leading fep/pfa encapsulated o-rings seals manufacturers and suppliers in China. And we also offer the customized service catering to your special requirement. Please be free to buy the rubber products with competitive price from us.

Any further information pls contact Suzy.

Welcome your inquiry !

Suzy  Wei,

Sales  Manager-Trade Dept.

E. suzy@tjswks.com   | M.+86 13662169442(whatsapp,skype,wechat)

FEP/PFA Encapsulated O-Rings Seals

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. They combine the energising properties of an elastomeric 'O'-Ring with the resilience to extreme temperatures and hostile chemicals of FEP/PFA.

Encapsulation Options

FEP Encapsulation

Standard material for all applications up to 205°C, resistant to virtually all chemicals and joined by an advanced heat moulding process to give a seamless encapsulation.

PFA Encapsulation

Same properties as FEP encapsulation but with greater heat resistance for applications above 205°C. Also resistant to virtually all chemicals and joined seamlessly via advanced heat moulding process.

Inner Core Options for FEP/PFA Encapsulated O-Rings Seals

Silicone Inner Core

Commercially best material option combined with lower Shore Hardness and greater elasticity than Viton™ rubber, providing an excellent material choice for the majority of applications.

Viton™  Inner Core

Greater chemical resistance than Silicone. If encapsulation is damaged, Viton™ rubber provides greater resilience to chemical attack.

Encapsulated O-Ring Installation Guidelines

The FEP/PFA encapsulation is a hard material with limited flexibility compared to the fully elastomeric o-ring inside. The encapsulation outer layer can be damaged during installation with excessive stretch or sharp edges on the part.

Heating the o-rings prior to installation and ensuring installation surfaces are free from sharp edges are two key factors in a successful installation.

Encapsulated O-Ring Heating Methods

Hot Water (Recommended)

Heat water to 100°C / 212°F.

Place o-rings in water for a minimum of 3 minutes.

Remove o-rings just prior to installing them.

If the o-rings become cool, reheat to installation is done while still warm.

Oven Heating

Set oven to 100°C / 212°F (ensure no excessive temperature fluctuation).

Place o-rings evenly on backing sheet.

Heat o-rings for a minimum of 15 minutes (no maximum time limit).

Install o-ring immediately after removing from the oven.

If the o-rings become cool, reheat to installation is done while still warm.

We passed ISO9001 and RoHS certificate, trust you will like our quality and price.

SWKS FEP/PFA Encapsulated Seals are manufactured in our high specification, ISO9001 certified factories to stringent quality requirements and standards. Only the highest possible grades of materials with the tightest tolerances are specified.

Utilising Eason® computer-controlled shadow graphs, Mitutoyo® CMM and Micro-Vu® digital imaging machines ensures the high quality and reliability of these seals.

Contact Suzy to get more information and GOOD price.