Internal Face Spring Seals Cantilever

Face Seals are typically used in static sealing applications. Internal Face Seals contain pressure inside a vessel and are often used as lid seals or in pipe flange fittings. A PTFE Face Seal offers advantages over traditional O-Rings in terms of pressure handling, chemical compatibility, and operating temperature range. Use in cyrogenic applications is common.

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Typical Range of Application

Pressure

Vacuum to 3,000 psi

[0 to 200 bar]

Temperature*

-320°F to 450°F

[-195°C to 230°C]

Ratings will vary based on materials and operating conditions

Values and ratings in this catalog are based on industry standard applications operating under ideal conditions. The customer should assume responsiblity for validation testing of performance and suitabilty of Eclipse Engineering products. Eclipse Engineering accepts no liabilty for the accuracy and applicabilty of provided information.

STANDARD ORDERING EXAMPLE:

EVF-I-234-ET006-M-S

EVF = Seal Series
I = Internal
234 = Dash Number
ET006 = Seal Material Code
M = Spring Load L – Light M – Medium H – Heavy
S = Spring Material S – Stainless Steel E – Elgiloy® H – Hastelloy®

NON-STANDARD ORDERING EXAMPLE:

EVF-I-C-02953-ET006-M-S

C

= Nominal Cross-Section



A = 1/16 in. (000 Series)

B = 3/32 in. (100 Series)

C = 1/8 in. (200 Series)

D = 3/16 in. (300 Series)

E = 1/4 in. (400 Series)

02953

= Seal ID in 1000ths



Example: 02953 = Ø2.953

[75MM] Seal Inside Diameter

EVF STANDARD SEAL MATERIALS

ECLIPSE MATERIAL CODE DESCRIPTION COLOR APPLICATIONS
ET000 Virgin PTFE White Light Duty / Static / Cryogenics
ET006 Carbon filled PTFE Black General Purpose
EU000 Virgin UHMWPE Translucent White Viscous Media / Water
ET014 Polyimide filled PTFE Orange/Brown High Sealabilty / Soft Hardware

EVF STANDARD SPRING MATERIALS

ECLIPSE MATERIAL CODE SPRING MATERIAL APPLICATIONS
S 300 Series Stainless Steel General purpose, standard spring material
E Elgiloy® Improved performance and corrosion resistance; NACE approved
H Hastelloy® C276 Maximum chemical/corrosion resistance

See Eclipse Material Guide for complete list of available materials.

000 SERIES STANDARD DASH NUMBERS

Gland Tolerances
ØB Tolerance
0.500 to 2.999 +0.002
-0.000
3.000 to 7.999 +0.003
-0.000
8.000 and up +0.004
-0.000
000 Series Maximum Extrusion Gap (E), at 70° F
300 psi 1500 psi 3000 psi 6000 psi
0.008 0.004 0.003 0.002

Consult Eclipse Engineering for all custom or unlisted sizes.

"We started Eclipse with the premise that if we could solve enough of our customers problems they would continue to come back to us for solutions regardless of the type of products we offered."

Engineers

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