Extended Heel Helical Spring Energized Piston Seal

Helical seals are a common choice for high pressure static joint seals. As such, a simple performance upgrade to an extended heel seal can make a very big difference. By specifying and extended heel version, pressure ratings can be doubled over non-extended designs. This becomes a very useful feature in cases where pressures are so high, that gaps are created between hardware interfaces, such as in pressure vessels. These gaps can be detrimental to a standard seal. Specifying and extended heel will add additional safety factor to any design.

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Typical Range of Application

Pressure

Vacuum to 10,000 psi

[0 to 680 bar]

Temperature*

-320°F to 450°F

[-195°C to 230°C]

Ratings will vary based on materials and operating conditions

*Limited by O-Ring compound

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:

EHSE-P-234-LW-ET000-H-P

EHSE = Seal Series
P = Piston
234 = Dash Number
LW = Lip Style
ET000 = Seal Material Code
H = Spring Load L – Light M – Medium H – Heavy
P = Spring Material S – Stainless Steel E – Elgiloy® H – Hastelloy®

NON-STANDARD ORDERING EXAMPLE:

EHSE-P-C-02953-LW-ET000-H-P

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

= Bore Diameter in 1000ths

Example: 02953 = Ø2.953 [75MM] Bore Diameter

EHSE 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

See Eclipse Material Guide for complete list of available materials.

EHSE STANDARD SPRING MATERIALS

ECLIPSE MATERIAL CODE SPRING MATERIAL APPLICATION
P 17-7 PH Stainless Steel General purpose, standard spring material
E Elgiloy® Improved performance and corrosion resistance; NACE approved
H Hastelloy® C276 Maximum chemical/corrosion resistance

"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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