Cantilever - Eclipse Engineering, Inc.

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Eclipse EVSR – O-Ring OD Cantilever Spring Energized Seal

When considering a rotary service seal and additional gland diameter is available, an O-Ring OD Seal provides a level of anti-rotation and redundant sealing. The addition of an O-Ring on the OD of a radial seal creates a high friction interface at the bore to counteract rotary forces. Because the O-Ring is a lower durometer than the jacket material, it is more compliant and offers tight sealing on the bore. This feature is utilized in equipment such as vapor recovery and vacuum pumps where running friction needs to be low and sealing efficiency high.

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:
	EVSR-R-548-LW-ET006-M-S-N

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

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

N		= O-Ring Material
		N – Nitrile (NBR) F – Fluorocarbon (FKM) E – Ethylene Propylene (EPDM)

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

= 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

EVSR 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.

EVSR 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