Helical Spring Energized Piston Seal

Eclipse Helical Spring Seals are comprised of a wound ribbon metal spring installed in a polymer jacket. This helical shape spring affords a relatively high load versus deflection range resulting in a seal product that can provide very tight sealing. As a highly loaded product, Helical Spring Seals should be considered when dynamics are very slow or static. Examples are in stems seals and in cryogenic valves where additional force is required to overcome thermal effects.

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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

*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:

EHS-P-234-LW-ET000-H-P

EHS = Seal Series
P = Piston
234 = Dash Number
LW = Lip Style
ET000 = Seal Material Code
H = Spring Load H – Heavy
P = Spring Material P – 17-7 PH Stainless Steel E – Elgiloy® H – Hastelloy®

NON-STANDARD ORDERING EXAMPLE:

EHS-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

EHS 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.

EHS 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

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Engineers

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