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BECA 550

BECA 550 - 559
beca_550_559_3d_v1
beca_550_559_3d_v2

Description

The BECA 550 profile is a double acting composite piston seal composed of a filled PTFE friction ring and a pre-tightened rubber O'Ring. It meets the standards MIL-G-5514F and AS4716.

Advantages

Suitable for a reduced size
Low friction coefficient; no stick-slip effect
Excellent extrusion and wear resistance
Wide temperature range and excellent chemical resistance, depending on the material selected for the O'Ring

Technical data

Temperature

-40°C/+200°C

Pressure

35 MPa

Speed

5 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

Friction ring

Bronze-filled PTFE
Carbon-filled PTFE
GL Blue PTFE

O'Ring

NBR 70 Shore A
FKM 70 Shore A

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de piston aéronautique - Housing Groove Gland aerospace piston seal BECA 550

Materials

Friction ring O'Ring Contact surface area
Standard code ISO code Material Colour Characteristics Code Type of material Service temperature
DP P Virgin PTFE White Resistance to chemical products
Sealing water
Dielectric
Non-stick
Low friction coefficient
Food & Beverage
K6 NBR 70 Shore A -30°C/+100°C Steel
Stainless steel
Chrome steel
Aluminium
Bronze
Cast iron
Treated surface
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
F6 VMQ 70
Shore A
-60°C/+200°C
DC C PTFE
+25% Carbon
Grey

Improvement

  • Wear properties
  • Compression set

Good resistance to chemical products
Thermal and electrical conductivity
Anti-static

Efficient as part of dynamic
applications with compression

K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
CG C PTFE
+ 23% Carbon
+ 2% Graphite
Black K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
DV V PTFE
+ 25 % Glass
Blue Improvement
  • Wear properties
  • Mechanical strength
Slightly more abrasive but can be
corrected with the addition of MOS2
Chemical and dielectric properties preserved

Well suited to applications with
rotating and simultaneous alternating movements
K6 NBR 70 Shore A -30°C/+100°C Steel
Chrome steel
Cast iron
G6 FKM 70 Shore A -20°C/+200°C
VM M PTFE
+ 15 % Glass
+ 5% MoS2
Grey K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
DX X GL Blue PTFE
+ Glass
+ Metal oxides
Turquoise blue Compression resistant
Wear resistant
Excellent chemical stability
Good thermal conductivity
K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
DG G PTFE
+ 15% Graphite
Black Improvement
  • Wear properties
Reduced wear on metal parts
Self-lubricating
Thermal and electrical conductivity
Low permeability
Good friction coefficient
Anti-static

Efficient as part of dynamic
dynamic applications with self-lubrication
K6 NBR 70 Shore A -30°C/+100°C Steel
Stainless steel
Chrome steel
Aluminium
Bronze
Cast iron
Treated surface
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
K1 K PTFE
+ 10% Ekonol
Light brown Improvement
  • Better abrasion resistance
  • Better dimensional stability at high temperatures
Use up to 300°C
Good friction coefficient and low permeability
K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
K2 K PTFE
20% Ekonol
Light brown K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
C6 EPDM 70 Shore A -40°C/+145°C
DB B PTFE
+ 60% Bronze
Dark brown Improvement
  • Wear properties
  • Deformation and creep resistance
  • Compression resistant
Self-lubricating
Electrical and thermal conductivity
Does not alter metal parts
Reduced resistance to certain chemical products

Used for dynamic seals with a strong compression and low level of wear
K6 NBR 70 Shore A -30°C/+100°C Steel
Chrome steel
Cast iron
G6 FKM 70 Shore A -20°C/+200°C
B4 B PTFE
+ 40% Bronze
Dark brown K6 NBR 70 Shore A -30°C/+100°C
G6 FKM 70 Shore A -20°C/+200°C
HG HG UHMW-PE White or off-white Excellent wear resistance on contact with water and air K6 NBR 70 Shore A -30°C/+80°C Steel
Stainless steel
Chrome steel
Aluminium
Bronze
Cast iron
Treated surface
PU U Polyurethane Blue Large mechanical resistance
Good abrasion and wear resistance
High elastic modulus
Good flexibility
Very good ozone and oxidation resistance
K6 NBR 70 Shore A -30°C/+90°C
PUHT U High-temperature polyurethane White or off-white K6 NBR 70 Shore A -30°C/+110°C

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Gland Aerospace Piston Seal - BECA 550

Groove widths and extrusion gaps

Series Groove width Extrusion gaps
F
O'Ring
Ød2
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 1.78
013 - 028 0.13
110 - 128 3.58 - 3.83 4.65 - 4.90 6.22 - 6.47 0.13 2.62
129 - 140 0.15
141 - 149 0.18
210 - 223 4.78 - 5.03 5.97 - 6.22 7.72 - 7.97 0.13 3.53
224 - 227 0.15
228 - 243 0.18
244 - 247 0.20
325 - 329 7.14 - 7.39 8.48 - 8.73 10.77 - 11.02 0.15 5.33
330 - 345 0.18
346 - 349 0.20
425 - 445 9.53 - 9.78 12.07 - 12.32 14.71 - 14.96 0.23 6.99
446 0.25
447 - 460 0.28

Tolerances on the bore diameters and groove diameters

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

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
550.A010
Standard request
010 9,14 6,35 6,30 2,39 3,78 5,26
550.A011
Standard request
011 10,72 7,92 7,87 2,39 3,78 5,26
550.A012
Standard request
012 12,32 9,53 9,47 2,39 3,78 5,26
550.A013
Standard request
013 13,97 11,20 11,13 2,39 3,78 5,26
550.A014
Standard request
014 15,57 12,80 12,73 2,39 3,78 5,26
550.A015
Standard request
015 17,15 14,38 14,30 2,39 3,78 5,26
550.A016
Standard request
016 18,75 15,98 15,90 2,39 3,78 5,26
550.A017
Standard request
017 20,32 17,55 17,48 2,39 3,78 5,26
550.A018
Standard request
018 21,92 19,13 19,08 2,39 3,78 5,26
550.A019
Standard request
019 23,50 20,70 20,65 2,39 3,78 5,26
550.A020
Standard request
020 25,17 22,38 22,33 2,39 3,78 5,26
550.A021
Standard request
021 26,75 23,95 23,90 2,39 3,78 5,26
550.A022
Standard request
022 28,35 25,55 25,50 2,39 3,78 5,26
550.A023
Standard request
023 29,92 27,13 27,08 2,39 3,78 5,26
550.A024
Standard request
024 31,52 28,73 28,68 2,39 3,78 5,26
550.A025
Standard request
025 33,10 30,30 30,25 2,39 3,78 5,26
550.A026
Standard request
026 34,70 31,90 31,85 2,39 3,78 5,26
550.A027
Standard request
027 36,27 33,48 33,43 2,39 3,78 5,26
550.A028
Standard request
028 37,87 35,08 35,03 2,39 3,78 5,26
550.A110
Standard request
110 13,97 9,63 9,45 3,58 4,65 6,22
550.A111
Standard request
111 15,57 11,20 11,05 3,58 4,65 6,22
550.A112
Standard request
112 17,15 12,75 12,62 3,58 4,65 6,22
550.A113
Standard request
113 18,75 14,35 14,22 3,58 4,65 6,22
550.A114
Standard request
114 20,32 15,93 15,80 3,58 4,65 6,22
550.A115
Standard request
115 21,92 17,50 17,40 3,58 4,65 6,22
550.A116
Standard request
116 23,50 19,06 18,97 3,58 4,65 6,22
550.A117
Standard request
117 25,17 20,75 20,65 3,58 4,65 6,22
550.A118
Standard request
118 26,75 22,33 22,23 3,58 4,65 6,22
550.A119
Standard request
119 28,35 23,93 22,83 3,58 4,65 6,22
550.A120
Standard request
120 29,92 25,48 25,40 3,58 4,65 6,22
550.A121
Standard request
121 31,52 27,08 27,00 3,58 4,65 6,22
550.A122
Standard request
122 33,10 28,65 28,58 3,58 4,65 6,22
550.A123
Standard request
123 34,70 30,25 30,18 3,58 4,65 6,22
550.A124
Standard request
124 36,27 31,83 31,75 3,58 4,65 6,22
550.A125
Standard request
125 37,87 33,43 33,35 3,58 4,65 6,22
550.A126
Standard request
126 39,45 35,00 34,93 3,58 4,65 6,22
550.A127
Standard request
127 41,05 36,60 36,53 3,58 4,65 6,22
550.A128
Standard request
128 42,62 38,18 38,10 3,58 4,65 6,22
550.A129
Standard request
129 44,22 39,78 39,70 3,58 4,65 6,22
550.A130
Standard request
130 45,85 41,43 41,33 3,58 4,65 6,22
550.A131
Standard request
131 47,42 43,00 42,90 3,58 4,65 6,22
550.A132
Standard request
132 49,02 44,60 44,50 3,58 4,65 6,22
550.A133
Standard request
133 50,60 46,18 46,08 3,58 4,65 6,22
550.A134
Standard request
134 52,20 47,78 47,68 3,58 4,65 6,22
550.A135
Standard request
135 53,80 49,38 49,28 3,58 4,65 6,22
550.A136
Standard request
136 55,37 50,95 50,85 3,58 4,65 6,22
550.A137
Standard request
137 56,97 52,55 52,45 3,58 4,65 6,22
550.A138
Standard request
138 58,55 54,13 54,03 3,58 4,65 6,22
550.A139
Standard request
139 60,15 55,73 55,63 3,58 4,65 6,22
550.A140
Standard request
140 61,72 57,30 57,20 3,58 4,65 6,22
550.A141
Standard request
141 63,32 58,90 58,80 3,58 4,65 6,22
550.A142
Standard request
142 64,90 60,48 60,38 3,58 4,65 6,22
550.A143
Standard request
143 66,50 62,08 61,98 3,58 4,65 6,22
550.A144
Standard request
144 68,07 63,65 63,55 3,58 4,65 6,22
550.A145
Standard request
145 69,67 65,25 63,15 3,58 4,65 6,22
550.A146
Standard request
146 71,25 66,83 66,73 3,58 4,65 6,22
550.A147
Standard request
147 72,85 68,43 68,33 3,58 4,65 6,22
550.A148
Standard request
148 74,42 70,00 69,90 3,58 4,65 6,22
550.A149
Standard request
149 76,02 71,60 71,50 3,58 4,65 6,22
550.A210
Standard request
210 25,17 19,05 19,00 4,78 5,97 7,72
550.A211
Standard request
211 26,75 20,62 20,57 4,78 5,97 7,72
550.A212
Standard request
212 28,35 22,20 22,17 4,78 5,97 7,72
550.A213
Standard request
213 29,92 23,77 23,75 4,78 5,97 7,72
550.A214
Standard request
214 31,52 25,37 25,35 4,78 5,97 7,72
550.A215
Standard request
215 33,10 27,03 26,92 4,78 5,97 7,72
550.A216
Standard request
216 34,70 25,55 28,52 4,78 5,97 7,72
550.A217
Standard request
217 36,27 30,12 30,10 4,78 5,97 7,72
550.A218
Standard request
218 37,87 31,72 31,70 4,78 5,97 7,72
550.A219
Standard request
219 39,45 33,30 33,27 4,78 5,97 7,72
550.A220
Standard request
220 41,05 34,90 34,87 4,78 5,97 7,72
550.A221
Standard request
221 42,62 36,47 36,45 4,78 5,97 7,72
550.A222
Standard request
222 44,22 38,07 38,05 4,78 5,97 7,72
550.A223
Standard request
223 47,42 41,28 41,25 4,78 5,97 7,72
550.A224
Standard request
224 50,60 44,45 44,42 4,78 5,97 7,72
550.A225
Standard request
225 53,80 47,65 47,63 4,78 5,97 7,72
550.A226
Standard request
226 56,97 50,83 50,80 4,78 5,97 7,72
550.A227
Standard request
227 60,15 54,00 53,98 4,78 5,97 7,72
550.A228
Standard request
228 63,32 57,18 57,15 4,78 5,97 7,72
550.A229
Standard request
229 66,50 60,35 60,33 4,78 5,97 7,72
550.A230
Standard request
230 69,67 63,53 63,50 4,78 5,97 7,72
550.A231
Standard request
231 72,85 66,70 66,68 4,78 5,97 7,72
550.A232
Standard request
232 76,02 69,88 69,85 4,78 5,97 7,72
550.A233
Standard request
233 79,20 73,05 73,03 4,78 5,97 7,72
550.A234
Standard request
234 82,37 76,23 76,20 4,78 5,97 7,72
550.A235
Standard request
235 85,55 79,40 79,38 4,78 5,97 7,72
550.A236
Standard request
236 88,72 82,58 82,55 4,78 5,97 7,72
550.A237
Standard request
237 91,90 85,75 85,73 4,78 5,97 7,72
550.A238
Standard request
238 95,07 88,93 88,93 4,78 5,97 7,72
550.A239
Standard request
239 98,25 92,10 92,10 4,78 5,97 7,72
550.A240
Standard request
240 101,42 95,28 95,28 4,78 5,97 7,72
550.A241
Standard request
241 104,60 98,45 98,45 4,78 5,97 7,72
550.A242
Standard request
242 107,77 101,63 101,63 4,78 5,97 7,72
550.A243
Standard request
243 110,95 104,80 104,80 4,78 5,97 7,72
550.A244
Standard request
244 114,12 107,98 107,98 4,78 5,97 7,72
550.A245
Standard request
245 117,30 111,15 111,15 4,78 5,97 7,72
550.A246
Standard request
246 120,47 114,33 114,33 4,78 5,97 7,72
550.A247
Standard request
247 123,65 117,50 117,50 4,78 5,97 7,72
550.A325
Standard request
325 47,42 37,97 37,97 7,14 8,48 10,77
550.A326
Standard request
326 50,60 41,15 41,15 7,14 8,48 10,77
550.A327
Standard request
327 53,80 44,35 44,35 7,14 8,48 10,77
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