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BECA 008

BECA 008
beca_008_3d_v1
beca_008_3d_v2

Description

The BECA 008 profile is an uncut back-up ring with a concave shape that allows it to fit snugly against the O'Ring. The ring is systematically assembled in tandem with an O'Ring and an X'Ring.

Advantages

Preferable for use in static applications
May be used for alternating movement applications
Large contact surface area, which protects the O'Ring from deformation caused by pulsating pressures
Easy assembly by deformation
Its production method makes it an economic solution

Technical data

Temperature

-30°C/+200°C

Pressure

< 250 MPa in static applications
< 20 MPa in alternating applications

Speed

2 m/s in alternating applications

Medias

The majority of liquids, or gaseous or chemical fluids, depending on the type of material selected. Refer to our fluids-materials compatibility guide.

Applications

Automotive
Hydraulic equipment
Mobile machinery
Machine tools
Injection presses
Valves
Hydraulic cylinders

Materials

NBR 90 Shore A as standard
FKM 90 Shore A
Other materials may be used

Dimensions
Materials
Design guidelines

Dimensions

Installation drawingLogement Gorge Bague anti-extrusion - Housing Groove Back-up ring - BECA 008

Materials

NBR (Nitrile Butadiene Rubber)

Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.

Chemical resistance Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, low-temperature alkaline and saline solutions
Water (up to +100°C max)
Compatibility issue Fuels with high aromatic content
Aromatic hydrocarbons (benzene)
Chlorinated hydrocarbons (trichlorethylene)
Polar solvents (ketone, acetone, acetic acid, ethylene-ester)
Strong acids
Glycol-based brake fluids
Atmospheric and ozone agents
Temperature range -30°C / +100°C (short-term peak at +120°C)
-40°C / +100°C with particular NBRs

FKM (fluorinated rubber)

Depending on their structure and fluorine content, the chemical resistance and resistance to the cold in fluororubbers can vary. This FKM-based rubber is very often used for high-temperature hydraulics and pneumatics, for industrial valves, injection/fuel systems, motor seals and high-vacuum systems.

Chemical resistance Mineral oils and greases, ASTM n°1, IRM 902 and IRM 903 oils.
Fire-resistant liquids (HFD)
Silicone oils and greases
Mineral and vegetable oils and greases
Aliphatic hydrocarbons (propane, butane, petroleum)
Aromatic hydrocarbons (benzene, toluene)
Chlorinated hydrocarbons (trichlorethylene)
Fuel (including high alcohol content)
Atmospheric and ozone agents
Compatibility issue Glycol-based brake fluids
Ammonia gas
Organic acids with a low molecular weight (formic and acetic acids)
Temperature range -20°C / +200°C (short-term peak at +230°C)
-40°C / +200°C with particular FKMs

Design guidelines

Housing Groove Back-up Ring - BECA 008

Installation dimensions for rubber BECA 008 according to standard AS 568A.

Series O'Ring Back-up ring Housing dimensions Radius
R1 ±0.2
Diametral clearance
F
Cross-section
Ød2
Radial height
W0
Thickness
T0
Thickness
A
Cylinder sealing Rod sealing Groove width
Groove diameter
Ød3 0/-0.10
Groove diameter
ØD6 +0.10/0
L2 0/+0.20 L3 0/+0.20
004 - 050 1.78 1.35 1.24 1.14 D4 - 2.90 d5 + 2.90 3.60 5.00 0.25 0.12
102 - 178 2.62 2.18 1.35 1.14 D4 - 4.50 d5 + 4.50 4.50 5.90 0.25 0.12
201 - 284 3.53 3.00 1.27 1.02 D4 - 6.20 d5 + 6.20 5.60 7.00 0.25 0.15
309 - 395 5.33 4.65 1.93 1.52 D4 - 9.40 d5 + 9.40 7.90 9.60 0.25 0.15
425 - 475 6.99 5.99 2.97 2.44 D4 - 12.20 d5 + 12.20 10.70 13.20 0.25 0.20
346 dimensions found
008.1A037
Standard request
8-004 2,00 5,20 3,60 5,00 0,25 2,44 x 5,14 x 1,35 x 1,14 x 2,21 010.1A037 1,78 x 1,78
008.1A038
Standard request
8-005 2,50 6,00 3,60 5,00 0,25 3,23 x 5,93 x 1,35 x 1,14 x 2,21 010.1A038 2,57 x 1,78
008.1A039
Standard request
8-006 3,00 6,50 3,60 5,00 0,25 3,56 x 6,26 x 1,35 x 1,14 x 2,21 010.1A039 2,9 x 1,78
008.1A040
Standard request
8-007 4,00 7,00 3,60 5,00 0,25 4,34 x 7,04 x 1,35 x 1,14 x 2,21 010.1A040 3,68 x 1,78
008.1A041
Standard request
8-008 5,00 8,00 3,60 5,00 0,25 5,13 x 7,83 x 1,35 x 1,14 x 2,21 010.1A041 4,47 x 1,78
008.1A042
Standard request
8-009 5,50 9,00 3,60 5,00 0,25 5,94 x 8,64 x 1,35 x 1,14 x 2,21 010.1A042 5,28 x 1,78
008.1A043
Standard request
8-010 6,50 10,00 3,60 5,00 0,25 6,73 x 9,43 x 1,35 x 1,14 x 2,21 010.1A043 6,07 x 1,78
008.1A046
Standard request
8-011 8,00 11,00 3,60 5,00 0,25 8,31 x 11,01 x 1,35 x 1,14 x 2,21 010.1A046 7,65 x 1,78
008.1A048
Standard request
8-012 9,50 13,00 3,60 5,00 0,25 9,91 x 12,61 x 1,35 x 1,14 x 2,21 010.1A048 9,25 x 1,78
008.1A050
Standard request
8-013 11,00 14,00 3,60 5,00 0,25 11,56 x 14,26 x 1,35 x 1,14 x 2,21 010.1A050 10,82 x 1,78
008.1A052
Standard request
8-014 13,00 16,00 3,60 5,00 0,25 13,16 x 15,86 x 1,35 x 1,14 x 2,21 010.1A052 12,42 x 1,78
008.1A053
Standard request
8-015 14,00 17,00 3,60 5,00 0,25 14,73 x 17,43 x 1,35 x 1,14 x 2,21 010.1A053 14,00 x 1,78
008.1A054
Standard request
8-016 16,00 19,00 3,60 5,00 0,25 16,33 x 19,03 x 1,35 x 1,14 x 2,21 010.1A054 15,60 x 1,78
008.1A055
Standard request
8-017 17,00 21,00 3,60 5,00 0,25 17,91 x 20,61 x 1,35 x 1,14 x 2,21 010.1A055 17,17 x 1,78
008.1A056
Standard request
8-018 19,00 22,00 3,60 5,00 0,25 19,51 x 22,21 x 1,35 x 1,14 x 2,21 010.1A056 18,77 x 1,78
008.1A057
Standard request
8-019 20,00 24,00 3,60 5,00 0,25 21,08 x 23,78 x 1,35 x 1,14 x 2,21 010.1A057 20,35 x 1,78
008.1A058
Standard request
8-020 22,00 25,00 3,60 5,00 0,25 22,68 x 25,38 x 1,35 x 1,14 x 2,21 010.1A058 21,95 x 1,78
008.1A059
Standard request
8-021 24,00 27,00 3,60 5,00 0,25 24,26 x 26,96 x 1,35 x 1,14 x 2,21 010.1A059 23,52 x 1,78
008.1A060
Standard request
8-022 25,00 29,00 3,60 5,00 0,25 25,86 x 28,56 x 1,35 x 1,14 x 2,21 010.1A060 25,12 x 1,78
008.1A061
Standard request
8-023 27,00 30,00 3,60 5,00 0,25 27,43 x 30,13 x 1,35 x 1,14 x 2,21 010.1A061 26,70 x 1,78
008.1A062
Standard request
8-024 29,00 32,00 3,60 5,00 0,25 29,03 x 31,73 x 1,35 x 1,14 x 2,21 010.1A062 28,30 x 1,78
008.1A063
Standard request
8-025 30,00 33,00 3,60 5,00 0,25 30,61 x 33,31 x 1,35 x 1,14 x 2,21 010.1A063 29,87 x 1,78
008.1A064
Standard request
8-026 32,00 35,00 3,60 5,00 0,25 32,21 x 34,91 x 1,35 x 1,14 x 2,21 010.1A064 31,47 x 1,78
008.1A065
Standard request
8-027 33,00 36,50 3,60 5,00 0,25 33,78 x 36,48 x 1,35 x 1,14 x 2,21 010.1A065 33,05 x 1,78
008.1A066
Standard request
8-028 35,00 38,00 3,60 5,00 0,25 35,58 x 38,28 x 1,35 x 1,14 x 2,21 010.1A066 34,65 x 1,78
008.1A067
Standard request
8-029 38,00 41,00 3,60 5,00 0,25 38,56 x 41,26 x 1,35 x 1,14 x 2,21 010.1A067 37,82 x 1,78
008.1A068
Standard request
8-030 41,00 44,50 3,60 5,00 0,25 41,73 x 44,43 x 1,35 x 1,14 x 2,21 010.1A068 41,00 x 1,78
008.1A069
Standard request
8-031 44,50 48,00 3,60 5,00 0,25 44,91 x 47,61 x 1,35 x 1,14 x 2,21 010.1A069 44,17 x 1,78
008.1A070
Standard request
8-032 48,00 51,00 3,60 5,00 0,25 48,08 x 50,78 x 1,35 x 1,14 x 2,21 010.1A070 47,35 x 1,78
008.1A071
Standard request
8-033 51,00 54,00 3,60 5,00 0,25 51,26 x 53,96 x 1,35 x 1,14 x 2,21 010.1A071 50,52 x 1,78
008.1A072
Standard request
8-034 54,00 57,00 3,60 5,00 0,25 54,43 x 57,13 x 1,35 x 1,14 x 2,21 010.1A072 53,70 x 1,78
008.1A073
Standard request
8-035 57,00 60,00 3,60 5,00 0,25 57,61 x 60,31 x 1,35 x 1,14 x 2,21 010.1A073 56,87 x 1,78
008.1A074
Standard request
8-036 60,00 63,50 3,60 5,00 0,25 60,78 x 63,48 x 1,35 x 1,14 x 2,21 010.1A074 60,05 x 1,78
008.1A075
Standard request
8-037 63,00 67,00 3,60 5,00 0,25 63,96 x 66,66 x 1,35 x 1,14 x 2,21 010.1A075 63,22 x 1,78
008.1A076
Standard request
8-038 67,00 70,00 3,60 5,00 0,25 67,13 x 69,83 x 1,35 x 1,14 x 2,21 010.1A076 66,40 x 1,78
008.1A077
Standard request
8-039 70,00 73,00 3,60 5,00 0,25 70,31 x 73,01 x 1,35 x 1,14 x 2,21 010.1A077 69,57 x 1,78
008.1A078
Standard request
8-040 73,00 76,00 3,60 5,00 0,25 73,48 x 76,18 x 1,35 x 1,14 x 2,21 010.1A078 72,75 x 1,78
008.1A079
Standard request
8-041 76,00 80,00 3,60 5,00 0,25 76,66 x 79,36 x 1,35 x 1,14 x 2,21 010.1A079 75,92 x 1,78
008.1A080
Standard request
8-042 83,00 86,00 3,60 5,00 0,25 83,01 x 85,71 x 1,35 x 1,14 x 2,21 010.1A080 82,27 x 1,78
008.1A081
Standard request
8-043 89,00 92,00 3,60 5,00 0,25 89,36 x 92,06 x 1,35 x 1,14 x 2,21 010.1A081 88,62 x 1,78
008.1A082
Standard request
8-044 95,00 99,00 3,60 5,00 0,25 95,71 x 98,10 x 1,35 x 1,14 x 2,21 010.1A082 94,97 x 1,78
008.1A083
Standard request
8-045 102,00 105,00 3,60 5,00 0,25 102,06 x 104,76 x 1,35 x 1,14 x 2,21 010.1A083 101,32 x 1,78
008.1A084
Standard request
8-046 108,00 111,00 3,60 5,00 0,25 108,41 x 111,11 x 1,35 x 1,14 x 2,21 010.1A084 107,67 x 1,78
008.1A085
Standard request
8-047 114,00 118,00 3,60 5,00 0,25 114,76 x 117,46 x 1,35 x 1,14 x 2,21 010.1A085 114,02 x 1,78
008.1A086
Standard request
8-048 121,00 124,00 3,60 5,00 0,25 121,11 x 123,81 x 1,35 x 1,14 x 2,21 010.1A086 120,37 x 1,78
008.1A087
Standard request
8-049 127,00 130,00 3,60 5,00 0,25 127,46 x 130,16 x 1,35 x 1,14 x 2,21 010.1A087 126,72 x 1,78
008.1A088
Standard request
8-050 133,00 137,00 3,60 5,00 0,25 133,81 x 136,51 x 1,35 x 1,14 x 2,21 010.1A088 133,07 x 1,78
008.1A179
Standard request
8-102 1,60 6,30 4,50 5,90 0,25 1,96 x 6,32 x 2,18 x 1,14 x 3,28 010.1A179 1,24 x 2,62
008.1A180
Standard request
8-103 2,50 7,00 4,50 5,90 0,25 2,77 x 7,13 x 2,18 x 1,14 x 3,28 010.1A180 2,06 x 2,62
008.1A181
Standard request
8-104 3,00 8,00 4,50 5,90 0,25 3,56 x 7,92 x 2,18 x 1,14 x 3,28 010.1A181 2,84 x 2,62
008.1A182
Standard request
8-105 4,00 9,00 4,50 5,90 0,25 4,34 x 8,70 x 2,18 x 1,14 x 3,28 010.1A182 3,63 x 2,62
008.1A183
Standard request
8-106 5,00 9,50 4,50 5,90 0,25 5,13 x 9,49 x 2,18 x 1,14 x 3,28 010.1A183 4,42 x 2,62
008.1A184
Standard request
8-107 5,50 10,00 4,50 5,90 0,25 5,94 x 10,3 x 2,18 x 1,14 x 3,28 010.1A184 5,23 x 2,62
008.1A185
Standard request
8-108 6,50 11,00 4,50 5,90 0,25 6,73 x 11,91 x 2,18 x 1,14 x 3,28 010.1A185 6,02 x 2,62
008.1A186
Standard request
8-109 8,00 13,00 4,50 5,90 0,25 8,31 x 12,67 x 2,18 x 1,14 x 3,28 010.1A186 7,59 x 2,62
008.1A266
Standard request
8-110 9,50 14,00 4,50 5,90 0,25 9,91 x 14,27 x 2,18 x 1,14 x 3,28 010.1A266 9,19 x 2,62
008.1A267
Standard request
8-111 11,00 16,00 4,50 5,90 0,25 11,48 x 15,84 x 2,18 x 1,14 x 3,28 010.1A267 10,77 x 2,62
008.1A268
Standard request
8-112 13,00 17,00 4,50 5,90 0,25 13,08 x 17,44 x 2,18 x 1,14 x 3,28 010.1A268 12,37 x 2,62
008.1A269
Standard request
8-113 14,00 19,00 4,50 5,90 0,25 14,66 x 19,02 x 2,18 x 1,14 x 3,28 010.1A269 13,94 x 2,62
008.1A270
Standard request
8-114 16,00 21,00 4,50 5,90 0,25 16,26 x 20,62 x 2,18 x 1,14 x 3,28 010.1A270 15,54 x 2,62
008.1A271
Standard request
8-115 17,00 22,00 4,50 5,90 0,25 17,83 x 22,19 x 2,18 x 1,14 x 3,28 010.1A271 17,12 x 2,62
008.1A272
Standard request
8-116 19,00 24,00 4,50 5,90 0,25 19,43 x 23,79 x 2,18 x 1,14 x 3,28 010.1A272 18,72 x 2,62
008.1A201
Standard request
8-117 20,00 25,00 4,50 5,90 0,25 21,11 x 25,47 x 2,18 x 1,14 x 3,28 010.1A201 20,29 x 2,62
008.1A203
Standard request
8-118 22,00 27,00 4,50 5,90 0,25 22,68 x 27,04 x 2,18 x 1,14 x 3,28 010.1A203. 21,89 x 2,62
008.1A205
Standard request
8-119 24,00 29,00 4,50 5,90 0,25 24,28 x 28,64 x 2,18 x 1,14 x 3,28 010.1A205 23,47 x 2,62
008.1A207
Standard request
8-120 25,00 30,00 4,50 5,90 0,25 25,86 x 30,22 x 2,18 x 1,14 x 3,28 010.1A207 25,07 x 2,62
008.1A208
Standard request
8-121 27,00 32,00 4,50 5,90 0,25 27,64 x 31,82 x 2,18 x 1,14 x 3,28 010.1A208 26,64 x 2,62
008.1A209
Standard request
8-122 29,00 33,00 4,50 5,90 0,25 29,03 x 33,39 x 2,18 x 1,14 x 3,28 010.1A209 28,24 x 2,62
008.1A210
Standard request
8-123 30,00 35,00 4,50 5,90 0,25 30,63 x 34,99 x 2,18 x 1,14 x 3,28 010.1A210 29,82 x 2,62
008.1A211
Standard request
8-124 32,00 36,50 4,50 5,90 0,25 32,21 x 36,57 x 2,18 x 1,14 x 3,28 010.1A211 31,42 x 2,62
008.1A212
Standard request
8-125 33,00 38,00 4,50 5,90 0,25 33,81 x 38,17 x 2,18 x 1,14 x 3,28 010.1A212 32,99 x 2,62
008.1A213
Standard request
8-126 35,00 40,00 4,50 5,90 0,25 35,58 x 39,94 x 2,18 x 1,14 x 3,28 010.1A213 34,59 x 2,62
008.1A214
Standard request
8-127 36,50 41,00 4,50 5,90 0,25 37,08 x 41,36 x 2,18 x 1,14 x 3,28 010.1A214 36,17 x 2,62
008.1A215
Standard request
8-128 38,00 43,00 4,50 5,90 0,25 38,56 x 42,92 x 2,18 x 1,14 x 3,28 010.1A215 37,77 x 2,62
008.1A216
Standard request
8-129 40,00 44,50 4,50 5,90 0,25 40,16 x 44,52 x 2,18 x 1,14 x 3,28 010.1A216 39,34 x 2,62
008.1A217
Standard request
8-130 41,00 46,00 4,50 5,90 0,25 41,70 x 46,09 x 2,18 x 1,14 x 3,28 010.1A217 40,94 x 2,62
008.1A218
Standard request
8-131 43,00 48,00 4,50 5,90 0,25 43,33 x 47,69 x 2,18 x 1,14 x 3,28 010.1A218 42,52 x 2,62
008.1A219
Standard request
8-132 44,50 50,00 4,50 5,90 0,25 44,91 x 49,27 x 2,18 x 1,14 x 3,28 010.1A219 44,12 x 2,62
008.1A220
Standard request
8-133 46,00 51,00 4,50 5,90 0,25 46,51 x 50,87 x 2,18 x 1,14 x 3,28 010.1A220 45,69 x 2,62
008.1A221
Standard request
8-134 48,00 52,00 4,50 5,90 0,25 48,08 x 52,44 x 2,18 x 1,14 x 3,28 010.1A221 47,29 x 2,62
008.1A222
Standard request
8-135 49,00 54,00 4,50 5,90 0,25 49,68 x 54,04 x 2,18 x 1,14 x 3,28 010.1A222 48,90 x 2,62
008.1A223
Standard request
8-136 51,00 55,50 4,50 5,90 0,25 51,26 x 55,62 x 2,18 x 1,14 x 3,28 010.1A223 50,47 x 2,62
008.1A224
Standard request
8-137 52,00 57,00 4,50 5,90 0,25 52,86 x 57,22 x 2,18 x 1,14 x 3,28 010.1A224 52,07 x 2,62
008.1A225
Standard request
8-138 54,00 58,00 4,50 5,90 0,25 54,43 x 58,79 x 2,18 x 1,14 x 3,28 010.1A225 53,64 x 2,62
008.1A226
Standard request
8-139 55,00 60,00 4,50 5,90 0,25 56,03 x 60,39 x 2,18 x 1,14 x 3,28 010.1A226 55,25 x 2,62
008.1A227
Standard request
8-140 57,00 62,00 4,50 5,90 0,25 57,61 x 61,97 x 2,18 x 1,14 x 3,28 010.1A227 56,82 x 2,62
008.1A228
Standard request
8-141 59,00 63,50 4,50 5,90 0,25 59,21 x 63,57 x 2,18 x 1,14 x 3,28 010.1A228 58,42 x 2,62
008.1A229
Standard request
8-142 60,00 65,00 4,50 5,90 0,25 60,78 x 65,14 x 2,18 x 1,14 x 3,28 010.1A229 59,99 x 2,62
008.1A230
Standard request
8-143 62,00 67,00 4,50 5,90 0,25 62,38 x 66,74 x 2,18 x 1,14 x 3,28 010.1A230 61,60 x 2,62
008.1A231
Standard request
8-144 63,00 68,00 4,50 5,90 0,25 63,96 x 68,32 x 2,18 x 1,14 x 3,28 010.1A231 63,17 x 2,62
008.1A232
Standard request
8-145 65,00 70,00 4,50 5,90 0,25 65,56 x 69,92 x 2,18 x 1,14 x 3,28 010.1A232 64,77 x 2,62
008.1A233
Standard request
8-146 67,00 71,00 4,50 5,90 0,25 67,13 x 71,49 x 2,18 x 1,14 x 3,28 010.1A233 66,34 x 2,62
008.1A234
Standard request
8-147 68,00 73,00 4,50 5,90 0,25 68,73 x 73,09 x 2,18 x 1,14 x 3,28 010.1A234 67,95 x 2,62
008.1A235
Standard request
8-148 70,00 75,00 4,50 5,90 0,25 70,31 x 74,67 x 2,18 x 1,14 x 3,28 010.1A235 69,52 x 2,62
008.1A236
Standard request
8-149 71,00 76,00 4,50 5,90 0,25 71,91 x 76,27 x 2,18 x 1,14 x 3,28 010.1A236 71,12 x 2,62
008.1A237
Standard request
8-150 73,00 78,00 4,50 5,90 0,25 73,48 x 77,84 x 2,18 x 1,14 x 3,28 010.1A237 72,69 x 2,62
008.1A238
Standard request
8-151 76,00 81,00 4,50 5,90 0,25 76,66 x 81,02 x 2,18 x 1,14 x 3,28 010.1A238 75,87 x 2,62
008.1A239
Standard request
8-152 83,00 87,00 4,50 5,90 0,25 83,01 x 87,37 x 2,18 x 1,14 x 3,28 010.1A239 82,22 x 2,62
008.1A240
Standard request
8-153 89,00 94,00 4,50 5,90 0,25 89,36 x 93,72 x 2,18 x 1,14 x 3,28 010.1A240 88,57 x 2,62
008.1A241
Standard request
8-154 95,00 100,00 4,50 5,90 0,25 95,71 x 100,7 x 2,18 x 1,14 x 3,28 010.1A241 94,92 x 2,62
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