Cantilever - Eclipse Engineering, Inc.

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Eclipse EVSC – Cased Cantilever Spring Energized Seal

Cased Spring Seals are the best option for extreme rotary service. In these designs, a metal case is constructed around the outside of a spring seal, which in turn gets press-fit into the hardware bore. A metal-to-metal press-fit ensures a tight seal as well as a highly effective anti-rotation mechanism. Because these seals are installed into open bores, they lend themselves to rotary applications such as gearboxes and power transmission systems. They can also be utilized as rod end scrapers, where exclusion of aggressive media is desired.

Typical Range of Application
Pressure	Temperature	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.
Vacuum to 3,000 psi [0 to 200 bar]	-320°F to 450°F [-195°C to 230°C]

Ratings will vary based on materials and operating conditions

Standard Ordering example:
	EVSC-R-548-LW-ET006-M-S-S

M		= Spring Load
		L – Light M – Medium H – Heavy

S		= Spring Material
		S – Stainless Steel E – Elgiloy® H – Hastelloy®

S		= Case Material
		S – Stainless Steel A – Aluminum

Non-Standard Ordering example:
	EVSC-R-C-02953-LW-ET006-M-S-S

= Nominal Cross-Section

A = 1/4 in. (400 Series)

B = 5/16 in. (500 Series)

C = 3/8 in. (600 Series)

D = 7/16 in. (700 Series)

E = 1/2 in. (800 Series)

02953		= Rod Diameter in 1000ths
		Example: 02953 = Ø2.953 [75MM] Rod Diameter

EVSC 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.

EVSC Standard Spring Materials

Eclipse Material Code	Spring Material	Application
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

400 Series Standard Dash Numbers

400 Series Maximum Extrusion Gap (E), at 70° F
300 psi	1500 psi	3000 psi
0.010	0.006	0.004