Buffer Ring Piston | Eclipse Engineering

EBR Piston 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 EBR profile will retrofit non-Eclipse seals designed for similar hardware.

Interested in this product?

DOWNLOAD PDF

PROJECT REQUEST FORM

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-P-03000-ET010-N


EBR2	= Seal Ring Series
P	= Piston
03000	= Bore Diameter X 1000 (inches)
ET010	= Material Code
N	= O-Ring Material Code

CROSS SECTION SERIES	ØA BORE H9	ØB GROOVE h9	GROOVE WIDTH +0.008/ -0.000	E CLEARANCE (MAX)
CROSS SECTION SERIES	ØA BORE H9	ØB GROOVE h9	GROOVE WIDTH +0.008/ -0.000	1500 PSI	3000 PSI	5000 PSI
EBR0	0.313 – 0.750	ØA – 0.193	0.087	0.012	0.009	0.007
EBR1	0.750 – 1.500	ØA – 0.287	0.126	0.016	0.012	0.008
EBR2	1.500 – 2.500	ØA – 0.421	0.165	0.016	0.012	0.009
EBR3	2.500 – 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 – 26.000	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.

STANDARD PART NUMBERS

000 SERIES:

PART NUMBER	BORE Ø +0.002/-0.000	GROOVE Ø +0.000/-0.002	GROOVE WIDTH	O-RING DASH SIZE
EBR0-P-00313	0.313	0.120	0.087/0.095	2-006
EBR0-P-00354	0.354 (9MM)	0.161		2-007
EBR0-P-00375	0.375	0.182		2-008
EBR0-P-00394	0.394 (10MM)	0.201		2-008
EBR0-P-00433	0.433 (11MM)	0.240		2-009
EBR0-P-00438	0.438	0.245		2-010
EBR0-P-00472	0.472 (12MM)	0.279		2-010
EBR0-P-00500	0.500	0.307		2-011
EBR0-P-00512	0.512 (13MM)	0.319		2-011
EBR0-P-00551	0.551 (14MM)	0.358		2-012
EBR0-P-00563	0.563	0.370		2-012
EBR0-P-00591	0.591 (15MM)	0.398		2-012

PART NUMBER	BORE Ø +0.002/-0.000	GROOVE Ø +0.000/-0.002	GROOVE WIDTH	O-RING DASH SIZE
EBR0-P-00625	0.625	0.432	0.087/0.095	2-013
EBR0-P-00630	0.630 (16MM)	0.437		2-013
EBR0-P-00669	0.669 (17MM)	0.476		2-013
EBR0-P-00688	0.688	0.495		2-014
EBR0-P-00709	0.709 (18MM)	0.516		2-014
EBR0-P-00748	0.748 (19MM)	0.555		2-015
EBR0-P-00750	0.750	0.557		2-015

Consult Eclipse Engineering for all custom or unlisted sizes.

100 SERIES:

PART NUMBER	BORE Ø +0.002/-0.000	GROOVE Ø +0.000/-0.002	GROOVE WIDTH	O-RING DASH SIZE
EBR1-P-00750	0.750	0.463	0.126/0.134	2-111
EBR1-P-00787	0.787 (20MM)	0.500		2-112
EBR1-P-00813	0.813	0.526		2-112
EBR1-P-00866	0.866 (22MM)	0.579		2-113
EBR1-P-00875	0.875	0.588		2-113
EBR1-P-00938	0.938	0.651		2-114
EBR1-P-00945	0.945 (24MM)	0.658		2-114
EBR1-P-01000	1.000	0.713		2-115
EBR1-P-01024	1.024 (26MM)	0.737		2-116
EBR1-P-01063	1.063	0.776		2-116
EBR1-P-01102	1.102 (28MM)	0.815		2-117
EBR1-P-01125	1.125	0.838		2-117

PART NUMBER	BORE Ø +0.002/-0.000	GROOVE Ø +0.000/-0.002	GROOVE WIDTH	O-RING DASH SIZE
EBR1-P-01181	1.181 (30MM)	0.894	0.126/0.134	2-118
EBR1-P-01188	1.188	0.901		2-118
EBR1-P-01250	1.250	0.963		2-119
EBR1-P-01260	1.260 (32MM)	0.973		2-119
EBR1-P-01313	1.313	1.026		2-120
EBR1-P-01339	1.339 (34MM)	1.052		2-121
EBR1-P-01375	1.375	1.088		2-121

Consult Eclipse Engineering for all custom or unlisted sizes.

200 SERIES:

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR2-P-01500	1.500	1.079	0.165/0.173	2-215
EBR2-P-01563	1.563	1.142		2-216
EBR2-P-01575	1.575 (40MM)	1.154		2-216
EBR2-P-01625	1.625	1.204		2-217
EBR2-P-01654	1.654 (42MM)	1.233		2-218
EBR2-P-01688	1.688	1.267		2-218
EBR2-P-01732	1.732 (44MM)	1.311		2-219
EBR2-P-01750	1.750	1.329		2-219
EBR2-P-01811	1.811 (46MM)	1.390		2-220
EBR2-P-01813	1.813	1.392		2-220
EBR2-P-01875	1.875	1.454		2-221
EBR2-P-01890	1.890 (48MM)	1.469		2-221
EBR2-P-01938	1.938	1.517		2-222
EBR2-P-01969	1.969 (50MM)	1.548		2-222
EBR2-P-02000	2.000	1.579		2-223

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR2-P-02125	2.125	1.704	0.165/0.173	2-223
EBR2-P-02165	2.165 (55MM)	1.744		2-224
EBR2-P-02250	2.250	1.829		2-224
EBR2-P-02362	2.362 (60MM)	1.941		2-225
EBR2-P-02375	2.375	1.954		2-225
EBR2-P-02500	2.500	2.079		2-226

Consult Eclipse Engineering for all custom or unlisted sizes.

300 SERIES:

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR3-P-02500	2.500	1.906	0.248/0.256	2-328
EBR3-P-02625	2.625	2.031		2-329
EBR3-P-02750	2.750	2.156		2-330
EBR3-P-02756	2.756 (70MM)	2.162		2-330
EBR3-P-02875	2.875	2.281		2-331
EBR3-P-03000	3.000	2.406		2-332
EBR3-P-03125	3.125	2.531		2-333
EBR3-P-03150	3.150 (80MM)	2.556		2-333
EBR3-P-03250	3.250	2.656		2-334
EBR3-P-03375	3.375	2.781		2-335
EBR3-P-03500	3.500	2.906		2-336
EBR3-P-03543	3.543 (90MM)	2.949		2-336
EBR3-P-03625	3.625	3.031		2-337
EBR3-P-03750	3.750	3.156		2-338
EBR3-P-03875	3.875	3.281		2-339

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR3-P-03973	3.973 (100MM)	3.379	0.248/0.256	2-340
EBR3-P-04000	4.000	3.406		2-340
EBR3-P-04125	4.125	3.531		2-341
EBR3-P-04250	4.250	3.656		2-342
EBR3-P-04331	4.331 (110MM)	3.737		2-342
EBR3-P-04375	4.375	3.781		2-343
EBR3-P-04500	4.500	3.906		2-344
EBR3-P-04625	4.625	4.031		2-345
EBR3-P-04724	4.724 (120MM)	4.130		2-346
EBR3-P-04750	4.750	4.156		2-346
EBR3-P-04875	4.875	4.281		2-347
EBR3-P-05000	5.000	4.406		2-348
EBR3-P-05118	5.118 (130MM)	4.524		2-349
EBR3-P-05250	5.250	4.656		2-350
EBR3-P-05375	5.375	4.781		2-351

Consult Eclipse Engineering for all custom or unlisted sizes.

300 SERIES CONTINUED:

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR3-P-05500	5.500	4.906	0.248/0.256	2-352
EBR3-P-05512	5.512 (140MM)	4.918		2-352
EBR3-P-05625	5.625	5.031		2-353
EBR3-P-05750	5.750	5.156		2-354
EBR3-P-05906	5.906 (150MM)	5.312		2-355
EBR3-P-06000	6.000	5.406		2-356
EBR3-P-06250	6.250	5.656		2-358
EBR3-P-06299	6.299 (160MM)	5.705		2-358
EBR3-P-06500	6.500	5.906		2-360
EBR3-P-06693	6.693 (170MM)	6.099		2-361
EBR3-P-06750	6.750	6.156		2-361
EBR3-P-07000	7.000	6.406		2-362
EBR3-P-07087	7.087 (180MM)	6.493		2-363
EBR3-P-07250	7.250	6.656		2-363
EBR3-P-07480	7.480 (190MM)	6.886		2-364

PART NUMBER	BORE Ø +0.003/-0.000	GROOVE Ø +0.000/-0.003	GROOVE WIDTH	O-RING DASH SIZE
EBR3-P-07500	7.500	6.906	0.248/0.256	2-364
EBR3-P-07750	7.750	7.156		2-365
EBR3-P-07874	7.874 (200MM)	7.280		2-366
EBR3-P-08000	8.000	7.406		2-366

Consult Eclipse Engineering for all custom or unlisted sizes.

400 SERIES:

PART NUMBER	BORE Ø +0.005/-0.000	GROOVE Ø +0.000/-0.005	GROOVE WIDTH	O-RING DASH SIZE
EBR4-P-08000	8.000	7.193	0.319/0.327	2-441
EBR4-P-08250	8.250	7.443		2-442
EBR4-P-08268	8.268 (210MM)	7.461		2-442
EBR4-P-08500	8.500	7.693		2-443
EBR4-P-08661	8.661 (220MM)	7.854		2-444
EBR4-P-09000	9.000	8.193		2-445
EBR4-P-09055	9.055 (230MM)	8.248		2-445
EBR4-P-09250	9.250	8.443		2-445
EBR4-P-09449	9.449 (240MM)	8.642		2-445
EBR4-P-09500	9.500	8.693		2-445
EBR4-P-09750	9.750	8.943		2-447
EBR4-P-09843	9.843 (250MM)	9.036		2-447
EBR4-P-10000	10.000	9.193		2-447

Consult Eclipse Engineering for all custom or unlisted sizes.

500 SERIES

PART NUMBER	BORE Ø +0.006/-0.000	GROOVE Ø +0.000/-0.006	GROOVE WIDTH	O-RING DASH SIZE
EBR5-P-10000	10.000	9.055	0.319/0.327	2-447
EBR5-P-10500	10.500	9.555		2-448
EBR5-P-10827	10.827 (275MM)	9.882		2-448
EBR5-P-11000	11.000	10.055		2-449
EBR5-P-11500	11.500	10.555		2-450
EBR5-P-11811	11.811 (300MM)	10.866		2-450
EBR5-P-12000	12.000	11.055		2-451
EBR5-P-12500	12.500	11.555		2-452
EBR5-P-12795	12.795 (325MM)	12.030		2-453
EBR5-P-13000	13.000	12.055		2-453
EBR5-P-13500	13.500	12.555		2-454
EBR5-P-13780	13.780 (350MM)	12.835		2-454
EBR5-P-14000	14.000	13.055		2-455
EBR5-P-14500	14.500	13.555		2-456

PART NUMBER	BORE Ø +0.006/-0.000	GROOVE Ø +0.000/-0.006	GROOVE WIDTH	O-RING DASH SIZE
EBR5-P-15000	15.000	14.055	0.319/0.327	2-457
EBR5-P-15748	15.748 (400MM)	14.803		2-458
EBR5-P-16000	16.000	15.055		2-459
EBR5-P-17000	17.000	16.055		2-460
EBR5-P-17717	17.717 (450MM)	16.772		2-462
EBR5-P-18000	18.000	17.055		2-463
EBR5-P-19000	19.000	18.055		2-465
EBR5-P-19685	19.685 (500MM)	18.740		2-466
EBR5-P-20000	20.000	19.055		2-467

Consult Eclipse Engineering for all custom or unlisted sizes.

HARDWARE DETAILS

CROSS SECTION SERIES	MIN BORE Ø FOR SOLID GLAND INSTALLATION	R RADIUS (MAX)	C LEAD-IN CHAMFER (MIN)
EBR0	0.313	0.020	0.080
EBR1	0.750	0.020	0.125
EBR2	1.500	0.025	0.160
EBR3	2.500	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."

What Can We Help You With?

Start a project request form and give us the specifics of your project. Our team will review and be in touch with you shortly!

CONTACT US

ECLIPSE EBR – PISTON BUFFER RING

Interested in this product?

Typical Range of Application

Pressure

Temperature*

Velocity

Media

ORDERING EXAMPLE:

EBR2-P-03000-ET010-N

EBR STANDARD SEAL MATERIALS

O-RING MATERIALS

STANDARD PART NUMBERS

000 SERIES:

100 SERIES:

200 SERIES:

300 SERIES:

300 SERIES CONTINUED:

4﻿00 SERIES:

500 SERIES

HARDWARE DETAILS

"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."

400 SERIES: