Features of FEP Encapsulated O-RINGS
|1.super chemical-resistance,can resistant nearly all the chemical
|2.good corrosiveness resistance|
|3.wide temperature range.|
|6.good sealing effect,long service time|
What is FEP Encapsulated O-RINGS?
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
FEP encapsulated O-rings are recommended when a standard O-ring has
inadequate chemical resistance for an application. They are also
recommended when a solid PTFE O-ring does not have the elasticity
for reliable, long term fluid sealing. They are often used where
chemical resistance and or hygiene is required.
Typical industries include:
We can provide practically any size of encapsulated rings. We hold
many sizes in stock. We offer solid and hollow core styles as well
as cam and groove gaskets.
Encapsulated O-rings are available in cross sections from 1.78mm to
25.4mm. The only size limits are with the smaller ID’s. Please
check our size limitation chart as the diameter of the cord
dictates the smallest possible ID.
FEP encapsulated O-rings offer excellent resistance to a wide range
of chemicals. They offer typical temperature ranges of:
• -60°C to +200°C with Silicone core.
• -20°C to +200°C with Viton ® core.
They offer low friction and a low ‘stick-slip’ effect.
PFA encapsulated O-rings offer extra abrasion resistance. When
combined with a Silicone core, they offer a temperature range of
-60°C to +260°C.
We also supply PFA encapsulated O-rings with a Viton ® core. These
seals offer a temperature range of -20°C to +200°C. Viton ® core
PFA encapsulated O-rings also provide extra abrasion resistance.
REGULATORY COMPLIANCE – SILICONE / VITON CORE & FEP / PFA
FDA & NSF 61
The clear Teflon FEP / PFA encapsulation complies with Part 177 of
Title 21 of the Food and Drug Administration regulations for safe
use as articles or components of articles for producing,
manufacturing, processing, preparing, treating, packing,
transporting or holding food in accordance with FDA regulation
The clear Teflon FEP / PFA encapsulation of our encapsulated
O-rings is compliant to NSF 61 requirements.
USP CLASS VI
Teflon ® FEP / PFA fluoropolymers have been tested in accordance
with USP Protocol. They meet the requirements of a USP Class VI
plastic. Only the FEP / PFA encapsulation comes into contact with
the product. Our FEP / PFA encapsulated O-rings are considered to
be USP Class VI compliant. For information on our core materials,
please read our material data sheets.
EU VO 1935/2004 AND 10/2011
Eastern Seals has researched and evaluated BFR documentation. We
have paid particular attention to “Recommendations of the Federal
Institute for Risk Assessment on Plastics intended to come in to
contact with Food”. Any material or article intended to come into
contact, directly or indirectly with food, must be sufficiently
inert to prevent substances from being transferred to food in
quantities large enough to endanger human health, or to bring about
an unacceptable change in the composition of the food or a
deterioration in its organoleptic properties.
The outer encapsulate is an FEP or PFA melt process-able polymer of
PTFE. PTFE is also known as the brand Teflon ®. PTFE polymers are
highly inert. They are often used in industrial food processing,
and domestic food cooking equipment.
Our FEP / PFA encapsulated O-rings manufacture is compliant with all relevant sections (1 to 21) of the E.C
Regulation Number 1935/2004 and the subsequent Articles.
We are pleased to advise that our FEP / PFA encapsulated O-rings
are compliant to EU VO 1935/2004 and 10/2011 certification.
To find out more information on our FEP encapsulated O-rings,
please visit our Downloads section.
Encapsulated seals were primarily designed to solve the growing
problems of sealing corrosive fluids in industry. This development
provided designers and engineers with a seal that combined the
chemical resistance of Teflon® with the resilience of rubber.
A seamless Teflon® jacket surrounds the elastomer core providing
the chemical inertness, whilst the memory in the elastomer core
energises the seal.
Encapsulated seals are available with two types of Teflon® jacket –
FEP which is standard, and PFA for more demanding applications.
The energising core is available in Viton®, Silicone or EPDM.
Viton® is offered as the standard because of its superior
compression set. For low-temperature applications, or where lower
closure forces are required a Silicone core is specified.
The design variations available, together with combined performance
characteristics of both the jacket material and elastomer core ,
ensures that encapsulated seals will be an effective solution for
many troublesome applications.
Encapsulated seals are used mainly in MACHINERY,Electronic field, Industrial machine
& equipment, cylindrical surface static sealing,flat face
static sealing, vacuum flange sealing, triangle groove application,
pneumatic dynamic sealing ,Medical equipment industry, heavy
machinery, excavators, etc.
1. Convenient: 24th Hours sales/After-sales Service online or on
2. Quality Assurance: We will discuss with you and supply you the
best quality comfortable to your market
3. Quick delivery: Time is money, we promise we always will deliver
the goods quicker than others
4. According to customers' drawing,customized specifications are
5. Low MOQ,small orders can be accepted.