BECA 022

BECA 022
beca_022_3d_v1
beca_022_3d_v2

Description

The BECA 022 profile is a double acting composite rod seal composed of a profiled rubber seal and a filled PTFE or POM back-up ring. It meets the standards MIL-G-5514F and AS4716.

Advantages

Excellent extrusion resistance
Good sealing effect in static applications
Wide temperature range and excellent chemical resistance, depending on the materials selected
Housing in line with MIL-G-5514F and AS4716

Technical data

Temperature

-40°C/+200°C

Pressure

35 MPa in static applications
21 MPa in dynamic applications

Speed

1 m/s

Medias

Mineral hydraulic oils
Fire-resistant liquids
Biocompatible fluids
Water
Others (contact our experts)

Applications

Actuators
Brakes systems
Flight controls
Engine systems
Landing gear

Materials

Profiled seal

NBR 70 Shore A
FKM 70 Shore A
EPDM 70 Shore A
VMQ 70 Shore A

Back-up ring

Polyoxymethylene - POM
Filled PTFE

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de tige aéronautique - Housing Groove Gland aerospace rod seal BECA 022

Materials

Profiled seal

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
EPDM (Ethylene Propylene Diene Monomer rubber)

As an Ethylene Propylene Diene Monomer copolymer, EPDM is commonly used for hot water taps, cooling systems, brake systems, dishwashers and washing machines.

Chemical resistance Hot water and steam up to +150°C
Glycol-based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5)
Organic and inorganic acids
Cleaning agents, sodium and potassium alkalis
Hydraulic fluids (HFD-R)
Silicone oils and greases
Polar solvents (alcohols, ketones and esters)
Atmospheric and ozone agents
Compatibility issue Mineral oils and greases
Hydrocarbons
Low impermeability to gas
Temperature range -45°C / +150°C (short-term peak at +175°C)
HNBR (Hydrogenated Nitrile Butadiene Rubber)

This HNBR-based rubber is obtained through selective hydrogenation of the NBR's butadiene groups. It is commonly used for power-assisted steering and for air conditioning.

Chemical resistance Aliphatic hydrocarbons
Mineral and vegetable oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, saline solutions and bases for operation at an average temperature
Water and steam up to +150°C
Atmospheric and ozone agents
Compatibility issue Chlorinated hydrocarbons
Polar solvents (ketones, esters and ethers)
Strong acids
Temperature range -30°C / +150°C (short-term peak at +160°C)
-40°C / +150°C with particular HNBRs
VMQ (silicone rubber: methyl vinyl polysiloxane)

This FVMQ-based rubber is very often used in fuel systems.

Chemical resistance Animal and vegetable oils and greases
Water for operation at an average temperature
Diluted saline solutions
Atmospheric and ozone agents
Compatibility issue Superheated steam up to +120°C
Chlorinated hydrocarbons with a low molecular weight (trichlorethylene)
Aromatic hydrocarbons (benzene, toluene)
Temperature range -60°C / +200°C (short-term peak at +230°C)
FVMQ (fluorosilicone rubber)

The FVMQ has mechanical and physical properties that are very similar to those of the VMQ. However, the FVMQ offers better resistance to fuels and mineral oils. However, resistance to hot air is not as good as that of the VMQ.

Chemical resistance Aromatic mineral oils (IRM 903 oil)
Fuels
Aromatic hydrocarbons with low molecular weights
(benzene, toluene)
Temperature range -70°C/+175°C

The table below gives an overview of the physical, chemical and mechanical characteristics for each of the materials.

Characteristics/Materials EPDM FKM FVMQ HNBR NBR VMQ
Abrasion resistant 2 2 4 2 2 4
Resistance to acids 2 1 3 1 3 3
Chemical resistance 1 1 1 2 2 2
Resistance to cold 2 4 2 2 2 2
Dynamic properties 2 2 4 1 2 4
Electrical properties 2 4 1 3 3 1
Flame resistant 4 1 2 4 4 3
Heat resistant 2 1 1 1 2 1
Sealing water 2 2 4 2 2 4
Oil resistant 4 1 2 1 1 2
Ozone resistant 1 1 1 2 4 1
Tearing resistant 1 3 4 2 2 4
Traction resistant 1 1 3 1 2 4
Water/vapour resistant 1 3 3 1 2 3
Resistance to atmospheric agents 1 1 1 2 3 1

1. Excellent properties 2. Good properties 3. Average properties 4. Poor properties

Back-up ring

Polyoxymethylene - POM

Polyoxymethylene (POM or polyacetal) belongs to the thermoplastics, which have a number of advantages - strong mechanical resistance, good creep strength, high resistance to shocks, particularly at low temperatures, good wear resistance, good sliding coefficient, excellent machinability and good dielectric properties. The low water absorption coefficient, unlike polyamide (PA), also gives this material an excellent dimensional stability.

Chemical resistance

Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Water

Compatibility issue Acids
Temperature range -50°C/+115°C
Filled PTFE

PTFE is a thermoplastic polymer made of tetrafluoroethylene with exceptional properties - very low friction coefficient (adhesive friction and sliding friction are almost equal), physiologically safe for temperatures up to +260°C, excellent electrical insulation properties, and excellent chemical compatibility with the majority of fluids. On the other hand, as this material is plastic and not elastic, so it cannot easily replace rubber bases.

Chemical compatibility

A "Chemical compatibility guide" catalogue can be downloaded from the Documentation section. You can also use our online "Chemical compatibility" tool free of charge.

These two tools give you the option of measuring the behaviour of our materials that come into contact with the majority of existing fluids. The data displayed is the result of rigorous testing of the ambient temperature and in consultation with previous publications. Test results are not fully representative due to the specific features of your application. The tests performed actually do not consider additives and impurities that may exist under the actual conditions of use, nor the potential elevation of temperatures. Other parameters can also alter the behaviour of our materials, such as the hardness, persistence, abrasion, etc. We therefore recommend performing your own tests to verify the compatibility of our materials according to your specific application. Our technical team can provide you with any additional information.

Technical data

Housing Groove Aerospace Rod Seal - BECA 022

Groove widths and extrusion gaps

Series Groove width Extrusion gaps
F
L1 min - max L2 min - max L3 min - max
010 - 012 2.39 - 2.52 3.81 - 4.06 5.26 - 5.51 0.10
013 - 028 0.13
110 - 125 3.58 - 3.83 4.65 - 4.90 6.22 - 6.47 0.13
126 - 131 0.15
132 - 149 0.18
210 - 222 4.78 - 5.03 5.97 - 6.22 7.72 - 7.97 0.13
223 - 225 0.15
226 - 245 0.18
246 - 247 0.20
325 - 327 7.14 - 7.39 8.48 - 8.73 10.77 - 11.02 0.15
328 - 349 0.18
425 - 449 9.53 - 9.78 12.07 - 12.32 14.71 - 14.96 0.23
450 - 460 0.25

Tolerances on the rod diameters and groove diameters

Series Tolerance on
rod diameter
Ød1
Tolerance on
groove diameter
ØD1
010 - 012 -0.025/0 0/+0.025
013 - 349 -0.050/0 0/+0.050
425 - 446 -0.076/0 0/+0.076
447 - 460 -0.076/0 0/+0.100

Surface roughness

Roughness Dynamic surface area Static surface area Groove flanks
Ra 0.05 - 0.2 µm ≤ 1.6 µm ≤ 3.2 µm
Rz 0.4 - 1.6 µm ≤ 6.3 µm ≤ 10.0 µm
Rmax 0.63 - 2.5 µm ≤ 10.0 µm ≤ 16.0 µm

Chamfers and radius

Series Radius Chamfer
R1 min - max R2 min - max C
010 - 028 0.13 - 0.26 0.13 - 0.38 2.00
110 - 149 0.13 - 0.26 0.13 - 0.38 2.50
210 - 222 0.13 - 0.26 0.13 - 0.38 3.00
223 - 247 0.13 - 0.26 0.25 - 0.64 3.50
325 - 349 0.13 - 0.26 0.51 - 0.89 4.00
425 - 460 0.13 - 0.26 0.51 - 0.89 4.50
158 dimensions found
022.010
Standard request
010 6,30 9,12 9,14 2,39 3,81 5,26
022.011
Standard request
011 7,87 10,69 10,72 2,39 3,81 5,26
022.012
Standard request
012 9,47 12,29 12,32 2,39 3,81 5,26
022.013
Standard request
013 11,05 13,84 13,89 2,39 3,81 5,26
022.014
Standard request
014 12,65 15,44 15,49 2,39 3,81 5,26
022.015
Standard request
015 14,22 17,02 17,07 2,39 3,81 5,26
022.016
Standard request
016 15,82 18,62 18,67 2,39 3,81 5,26
022.017
Standard request
017 17,40 20,19 20,24 2,39 3,81 5,26
022.018
Standard request
018 19,00 21,79 21,84 2,39 3,81 5,26
022.019
Standard request
019 20,57 23,37 23,42 2,39 3,81 5,26
022.020
Standard request
020 22,17 24,97 25,02 2,39 3,81 5,26
022.021
Standard request
021 23,75 26,54 26,59 2,39 3,81 5,26
022.022
Standard request
022 25,35 28,14 28,19 2,39 3,81 5,26
022.023
Standard request
023 26,92 29,72 29,77 2,39 3,81 5,26
022.024
Standard request
024 28,52 31,32 31,37 2,39 3,81 5,26
022.025
Standard request
025 30,10 32,89 32,94 2,39 3,81 5,26
022.026
Standard request
026 31,70 34,49 34,54 2,39 3,81 5,26
022.027
Standard request
027 33,27 36,07 36,12 2,39 3,81 5,26
022.028
Standard request
028 34,87 37,67 37,72 2,39 3,81 5,26
022.110
Standard request
110 9,47 13,87 14,00 3,58 4,65 6,22
022.111
Standard request
111 11,05 15,47 15,57 3,58 4,65 6,22
022.112
Standard request
112 12,65 17,07 17,17 3,58 4,65 6,22
022.113
Standard request
113 14,22 18,64 18,75 3,58 4,65 6,22
022.114
Standard request
114 15,82 20,24 20,35 3,58 4,65 6,22
022.115
Standard request
115 17,40 21,82 21,92 3,58 4,65 6,22
022.116
Standard request
116 19,00 23,44 23,52 3,58 4,65 6,22
022.117
Standard request
117 20,57 25,02 25,10 3,58 4,65 6,22
022.118
Standard request
118 22,17 26,62 26,70 3,58 4,65 6,22
022.119
Standard request
119 23,75 28,19 28,27 3,58 4,65 6,22
022.120
Standard request
120 25,35 29,79 29,87 3,58 4,65 6,22
022.121
Standard request
121 26,92 31,37 31,45 3,58 4,65 6,22
022.122
Standard request
122 28,52 32,97 33,05 3,58 4,65 6,22
022.123
Standard request
123 30,10 34,54 34,62 3,58 4,65 6,22
022.124
Standard request
124 31,70 36,14 36,22 3,58 4,65 6,22
022.125
Standard request
125 33,27 37,72 37,80 3,58 4,65 6,22
022.126
Standard request
126 34,87 39,32 39,40 3,58 4,65 6,22
022.127
Standard request
127 36,45 40,89 40,97 3,58 4,65 6,22
022.128
Standard request
128 38,05 42,49 42,57 3,58 4,65 6,22
022.129
Standard request
129 39,62 44,07 44,15 3,58 4,65 6,22
022.130
Standard request
130 41,22 45,67 45,75 3,58 4,65 6,22
022.131
Standard request
131 42,80 47,24 47,32 3,58 4,65 6,22
022.132
Standard request
132 44,40 48,84 48,92 3,58 4,65 6,22
022.133
Standard request
133 45,97 50,39 50,50 3,58 4,65 6,22
022.134
Standard request
134 47,57 51,99 52,10 3,58 4,65 6,22
022.135
Standard request
135 49,17 53,59 53,70 3,58 4,65 6,22
022.136
Standard request
136 50,75 55,17 55,27 3,58 4,65 6,22
022.137
Standard request
137 52,35 56,77 56,87 3,58 4,65 6,22
022.138
Standard request
138 53,92 58,34 58,45 3,58 4,65 6,22
022.139
Standard request
139 55,52 59,94 60,05 3,58 4,65 6,22
022.140
Standard request
140 57,10 61,52 61,62 3,58 4,65 6,22
022.141
Standard request
141 58,70 63,12 63,22 3,58 4,65 6,22
022.142
Standard request
142 60,27 64,69 64,80 3,58 4,65 6,22
022.143
Standard request
143 61,87 66,29 66,40 3,58 4,65 6,22
022.144
Standard request
144 63,45 67,87 67,97 3,58 4,65 6,22
022.145
Standard request
145 65,05 69,47 69,57 3,58 4,65 6,22
022.146
Standard request
146 66,62 71,04 71,15 3,58 4,65 6,22
022.147
Standard request
147 68,22 72,64 72,75 3,58 4,65 6,22
022.148
Standard request
148 69,80 74,22 74,32 3,58 4,65 6,22
022.149
Standard request
149 71,40 75,82 75,92 3,58 4,65 6,22
022.210
Standard request
210 19,00 25,12 25,17 4,78 5,97 7,72
022.211
Standard request
211 20,57 26,7 26,75 4,78 5,97 7,72
022.212
Standard request
212 22,17 28,32 28,35 4,78 5,97 7,72
022.213
Standard request
213 23,75 29,9 29,92 4,78 5,97 7,72
022.214
Standard request
214 25,35 31,5 31,52 4,78 5,97 7,72
022.215
Standard request
215 26,92 33,07 33,10 4,78 5,97 7,72
022.216
Standard request
216 28,52 34,67 34,70 4,78 5,97 7,72
022.217
Standard request
217 30,10 36,25 36,27 4,78 5,97 7,72
022.218
Standard request
218 31,70 37,85 37,87 4,78 5,97 7,72
022.219
Standard request
219 33,27 39,42 39,45 4,78 5,97 7,72
022.220
Standard request
220 34,87 41,02 41,05 4,78 5,97 7,72
022.221
Standard request
221 36,45 42,6 42,62 4,78 5,97 7,72
022.222
Standard request
222 38,05 44,2 44,22 4,78 5,97 7,72
022.223
Standard request
223 41,22 47,37 47,40 4,78 5,97 7,72
022.224
Standard request
224 44,40 50,55 50,57 4,78 5,97 7,72
022.225
Standard request
225 47,57 53,72 53,75 4,78 5,97 7,72
022.226
Standard request
226 50,75 56,9 56,92 4,78 5,97 7,72
022.227
Standard request
227 53,92 60,07 60,10 4,78 5,97 7,72
022.228
Standard request
228 57,10 63,25 63,27 4,78 5,97 7,72
022.229
Standard request
229 60,27 66,42 66,45 4,78 5,97 7,72
022.230
Standard request
230 63,45 69,6 69,62 4,78 5,97 7,72
022.231
Standard request
231 66,62 72,77 72,80 4,78 5,97 7,72
022.232
Standard request
232 69,80 75,95 75,97 4,78 5,97 7,72
022.233
Standard request
233 72,97 79,12 79,15 4,78 5,97 7,72
022.234
Standard request
234 76,12 82,27 82,30 4,78 5,97 7,72
022.235
Standard request
235 79,30 85,45 85,47 4,78 5,97 7,72
022.236
Standard request
236 82,47 88,62 88,65 4,78 5,97 7,72
022.237
Standard request
237 85,65 91,8 91,82 4,78 5,97 7,72
022.238
Standard request
238 88,82 94,97 95,00 4,78 5,97 7,72
022.239
Standard request
239 92,00 98,15 98,17 4,78 5,97 7,72
022.240
Standard request
240 95,17 101,32 101,35 4,78 5,97 7,72
022.241
Standard request
241 98,35 104,5 104,52 4,78 5,97 7,72
022.242
Standard request
242 101,52 107,67 107,70 4,78 5,97 7,72
022.243
Standard request
243 104,70 110,85 110,87 4,78 5,97 7,72
022.244
Standard request
244 107,87 114,02 114,05 4,78 5,97 7,72
022.245
Standard request
245 111,05 117,2 117,22 4,78 5,97 7,72
022.246
Standard request
246 114,22 120,37 120,40 4,78 5,97 7,72
022.247
Standard request
247 117,40 123,55 123,57 4,78 5,97 7,72
022.325
Standard request
325 38,05 47,5 47,50 7,14 8,48 10,77
022.326
Standard request
326 41,22 50,67 50,67 7,14 8,48 10,77
022.327
Standard request
327 44,40 53,85 53,85 7,14 8,48 10,77
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