PFA - FEP TEFLON® ENCAPSULATED O-RINGS and SPRING ENERGIZED SEALS

FEP and PFA Teflon® type Fluoropolymers (plastics) offer excellent chemical and temperature resistance, but lack the resiliency of elastomers (rubber) required to maintain a quality seal. Encapsulated and spring energized seals combine the best features of plastics, elastomers and steel springs to increase chemical and temperature performance compared to most solid elastomers. The main offsetting limitation is Teflon's® stiffness can require custom gland design to maximize sealing.

Seal
Type

(CPD#)

Seal
Cross-Section

Relative Price

Highlight Features

Temperature
Range

Pressure
Range

Dynamic
Application

Slow Dynamic
Application

Excellent Chemical
Compatibility

Static
Application

FEP Encapsulated
Silicone Core

(T1002)

Teflon PTFE Silicone Cross Section

$

Lowest Cost

Most Readily Available

-80 o F

To

+400 o F PFA +500 o F

Up to
1500 psi

No

Yes

Yes

Yes

FEP
Encapsulated
Hollow Silicone Core (T1003)

Hollow Teflon PTFE Silicone Cross Section

$$

Less Force Required to Compress

-80 o F

To

+400 o F PFA +500 o F

Up to
500 psi

No

Yes

Yes

Yes

FEP
Encapsulated
FKM (Viton®) Core (T1001)

Hollow Teflon PTFE FKM Cross Section

$$

Greater Chemical Resistance and Compression Set Resistance

-15 o F

To

+400 o F

Up to
1500 psi

No

Yes

Yes

Yes

FEP
Encapsulated
Steel Spring Core (T1021)

Hollow Teflon PTFE cross Section

$$$

Cryogenic Sealing Applications

-420 o F

To

+400 o F

PFA +500 o F

Up to 3000 psi Vents

No

Yes

Yes

Yes

Steel Spring Energized PTFE (Teflon ® ) Seal

Spring Energized Seal Cross Section

$$$

Extreme Temp Pressure Chemical Dynamic App Performance

-420 o F

To

+600 o F

Up to
60,000psi
Design

Yes

Yes

Yes

Yes

SOLID FFKM MARKEZ ® KALREZ ®

O-ring Cross Section

$$$

Improved Sealing Performance Longer Seal Life

-50 o F

To

+620 o F

Up to
25000 psi

With back-up ring

Yes

Yes

Yes

Yes


FEP Encapsulated Silicone O-Rings Teflon PTFE Enccapsulated Seal

O-Ring with a FEP or PFA (Teflon®) outer layer encapsulating a Silicone core. The Teflon® shell offers excellent chemical and temperature resistance while the Silicone core provides the resiliency needed to provide effective sealing. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1002 is FEP encapsulated Solid Silicone with improved chemical resistance up to +400 o F. CPD# T1022 is PFA encapsulated Solid Silicone up to +500 o F.

FEP Encapsulated Silicone Hollow Core

Hollow Teflon PTFE Enccapsulated Seal

O-Ring with a FEP (Teflon®) outer layer encapsulating a Hollow Silicone core. The Teflon® shell offers excellent chemical and temperature resistance while the Hollow Silicone core provides the resiliency needed to provide effective sealing. The hollow core requires less force to compress the seal resulting in easier installation and improved sealing performance in some applications. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1003 is FEP encapsulated Hollow Silicone with up to +400 o F.

FEP Encapsulated FKM (Viton ® ) Core Hollow Teflon PTFE Enccapsulated O-ring

O-Ring with a FEP (Teflon®) outer layer encapsulating a Solid FKM (Viton®) core. The Teflon® shell offers excellent chemical and temperature resistance while the FKM core provides the resiliency needed to provide effective sealing. The FKM core provides increased chemicals and compression set resistance resulting in longer lasting sealing in some applications. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1001 is FEP encapsulated Solid FKM with improved chemical resistance up to +400 o F

FEP Encapsulated Steel Spring Core Spring Energized Bal Seal

O-Ring with a FEP (Teflon®) outer layer encapsulating Stainless Steel Spring. The Teflon® shell offers excellent chemical and temperature resistance while the Steel Spring core provides the resiliency needed to provide effective Cryogenic Seal performance down -420 o F. Readily available in USA and metric cross-sections and nearly unlimited diameters. CPD# T1021 is FEP encapsulated Steel Spring with Cryogenic Sealing down to -420 o F and up to +400 o F. PFA encapsulated steel spring up to +500 o F.

Steel Spring Energized PTFE (Teflon ® ) Seals Spring Enegized Seal Cross Section

PTFE (Teflon®) U-Cup style Lip Seal energized by a stainless steel spring. Spring Energized Teflon Seals provide the best chemical resistance, widest temperature and pressure performance ranges of any plastic or elastomeric seal. Spring Energized Teflon Seals can perform in Cryogenic Sealing temperatures of nearly absolute zero -420 o F to 600 o F. Pressures up to 3,000 psi and custom designs allow up to 60,000 psi. A wide range of high performance plastics are available for specific application performance. Designed for radial, face or custom seal configurations, as well as rotary, reciprocating and oscillatory motions depending on design. Low friction and long service life in demanding application. Wide range of spring energizing configurations based on applications. Seals are available in Rod and Piston Inside and Outside Pressure and unidirectional sealing configurations. Great performance in compressed gas waterless fracking seals, LPG and Liquid Nitrogen seals. Alternative to MSE® Seals, Bal Seals, Variseal®, OmniSeal®, FlexiSeal®.

SOLID FFKM MARKEZ ® KALREZ ®

O-ring Profile Graphic

O-Rings and Custom Molded FFKM MARKEZ® KALREZ® Seals provide the ultimate chemical, temperature and sealing performance in demanding applications that are worth investing in high performance high cost seals. Dozens of specialized compounds are available to maximize specific application performance temperatures to -50 o F and +620 o F


COMMON APPLICATION

  • Valve Stems
  • Flanges
  • Pumps
  • Swivels
  • Turbo Pumps
  • Joints
  • Turbo Expanders
  • Cryogenic seals
  • Waterless fracking

ENCAPSULATED O-RING COMMON CROSS-SECTIONS AND DIAMETERS

O-Ring
Cross-Section
(inches)

O-Ring
Cross-Section
(mm)

Recommended
Compression
(inches)

Minimum
ID

Maximum
ID

0.070 +/- .005

1.78

0.017

0.500

10.000

0.075 +/- .005

1.91

0.018

0.500

10.000

0.094 +/- .005

2.40

0.022

0.600

15.000

0.103 +/- .005

2.62

0.024

0.600

Unlimited

0.110 +/- .005

2.79

0.025

0.600

Unlimited

0.118 +/- .005

3.00

0.025

0.750

Unlimited

0.125 +/- .006

3.18

0.025

0.750

Unlimited

0.139 +/- .006

3.53

0.025

0.750

Unlimited

0.148 +/- .006

3.76

0.027

0.950

Unlimited

0.157 +/- .007

3.99

0.027

1.150

Unlimited

0.177 +/- .007

4.50

0.031

1.500

Unlimited

0.197 +/- .008

5.00

0.035

1.500

Unlimited

0.210 +/- .008

5.33

0.038

1.500

Unlimited

0.225 +/- .008

5.72

0.040

1.500

Unlimited

0.250 +/- .010

6.35

0.043

2.500

Unlimited

0.275 +/- .010

6.99

0.043

2.500

Unlimited

0.295 +/- .010

7.49

0.047

2.750

Unlimited

0.315 +/- .012

8.00

0.050

3.000

Unlimited

0.331 +/- .012

8.40

0.057

4.000

Unlimited



Contact us for Pricing

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New Customer Hotline: 800-775-6525

Existing Customer Specialist: 800-775-6525 or repeat customers

Marco Rubber & Plastics
PO Box 1150
Seabrook, NH 03874

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