Buffer Ring Rod

EBR Rod Buffer Rings are linear, uni-directional, elastomer energized seals typically used in reciprocating hydraulic cylinder assemblies but available for a wide variety of industries and applications. Advantages include long wear life, low friction, and simple groove design. The geometry will provide controlled sealability during stroke extension while preventing pressure trapping and allowing fluid return during stroke retraction. The EBR profile will retrofit non-Eclipse seals designed for similar hardware.

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Typical Range of Application

Pressure

1,500 – 5,000 psi

[100 – 350 bar]

Temperature*

-30°F to 250°F

[-34°C to 121°C]

Velocity

13 fps [4 m/s]

Media

Hydraulic/Mineral Oil or similar

*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.

ORDERING EXAMPLE:

EBR2-R-03000-ET010-N

EBR2 = Seal Ring Series
R = Rod
03000 = Rod Diameter X 1000 (inches)
ET010 = Material Code
N = O-Ring Material Code
CROSS
SECTION
SERIES
ØA
ROD
h9
ØB
GROOVE
H9
GROOVE WIDTH
+0.008/
-0.000
E CLEARANCE (MAX)
1500 PSI 3000 PSI 5000 PSI
EBR0 0.125 – 0.313 ØA + 0.193 0.087 0.012 0.009 0.007
EBR1 0.313 – 0.750 ØA + 0.287 0.126 0.016 0.012 0.008
EBR2 0.750 – 1.500 ØA + 0.421 0.165 0.016 0.012 0.009
EBR3 1.500 – 8.000 ØA + 0.594 0.248 0.020 0.014 0.010
EBR4 8.000 – 10.000 ØA + 0.807 0.319 0.024 0.017 0.012
EBR5 10.000 – 25.000 ØA + 0.945 0.319 0.024 0.017 0.012

EBR STANDARD SEAL MATERIALS

ECLIPSE MATERIAL CODE DESCRIPTION COLOR APPLICATIONS
ET010 Bronze filled PTFE Brown Standard material for hydraulics
ET020 Carbon Fiber filled PTFE Black Abrasive, heavy wear, extended life requirements
ET014 Polyimide filled PTFE Orange/Brown High sealabilty, soft hardware

See Eclipse Material Guide for complete list of available materials.

O-RING MATERIALS

ECLIPSE MATERIAL CODE DESCRIPTION HARDNESS SHORE A TEMPERATURE RANGE
0 or blank Seal provided without O-Ring
N Nitrile (NBR) 70 -30°F to 250°F [-34°C to 121°C]
F Fluorocarbon (FKM) 75 -15°F to 400°F [-26°C to 205°C]
E Ethylene Propylene (EPDM) 70 -70°F to 250°F [-57°C to 121°C]

Full range of elastomer compounds available for specialty applications.

HARDWARE DETAILS

CROSS SECTION SERIES MIN ROD Ø FOR SOLID GLAND INSTALLATION R RADIUS (MAX) C LEAD-IN CHAMFER (MIN)
EBR0 0.125 0.020 0.080
EBR1 0.313 0.020 0.125
EBR2 0.750 0.025 0.160
EBR3 1.500 0.030 0.250
EBR4 8.000 0.035 0.300
EBR5 10.000 0.035 0.300

Consult Eclipse Engineering for application/material specific hardware design requirements.

"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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