BECA 550 - 559

BECA 550 - 559
BECA 550 - 559
beca_550_559_3d_v1
beca_550_559_3d_v2

Description

The BECA 550-559 profiles are double acting composite piston seals composed of a filled PTFE friction ring and pre-tightened rubber O'Ring. They can be mounted in the grooves of the O'Rings. Option of connecting the seal to 1 or 2 back-up rings.

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

-30°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

Machine tools
Lifting systems
Valves

Materials

Friction ring

Bronze-filled PTFE
Carbon-filled PTFE
GL Blue PTFE

O'Ring

NBR 70 Shore A
FKM 70 Shore A

Dimensions
Installation dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de piston - Housing Groove Gland Piston seal BECA 550 - 559

Installation dimensions

Housing Groove Gland piston seal - BECA 550 - 559

Installation dimensions

Bore diameter
ØD1 H9
Groove diameter Groove width Radial section O'Ring
cross-section
BECA 550
Standard series
BECA 559
Extended series
Ød1 h9 L1 0/+0.20 S Ød2
5.0 - 13.9 5.0 - 139.9 D1 - 2.90 2.40 1.45 1.78
14.0 - 24.9 8.0 - 259.9 D1 - 4.50 3.60 2.25 2.62
25.0 - 45.9 12.0 - 469.9 D1 - 6.20 4.80 3.10 3.53
46.0 - 124.9 20.0 - 669.9 D1 - 9.40 7.10 4.70 5.33
125.0 - 669.9 80.0 - 999.9 D1 - 12.20 9.50 6.10 6.99
670.0 - 999.9 125.0 - 999.9 D1 - 15.00 10.00 7.50 8.40

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 -45°C/+150°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 -45°C/+150°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 -45°C/+150°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 -45°C/+150°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 -45°C/+150°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 -45°C/+150°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 PE-UHMW 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

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Gland piston seal - BECA 550 - 559

Extrusion gaps

Radial section
S
Radial extrusion gap
F/2
2 MPa 10 MPa 20 MPa 35 MPa
1.45 0.10 0.10 0.08 0.05
2.25 0.15 0.15 0.10 0.07
3.10 0.25 0.20 0.15 0.08
4.70 0.35 0.25 0.20 0.10
6.10 0.50 0.30 0.25 0.15
7.50 0.60 0.40 0.30 0.20

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

Radial section
S
Radius
R1
Radius
R2
Chamfer
C
1.45 0.30 0.40 2.00
2.25 0.30 0.40 2.00
3.10 0.30 0.60 3.00
4.70 0.30 0.80 3.00
6.10 0.30 0.80 5.00
7.50 0.30 1.00 6.00
95 dimensions found
550.008
Standard request
8,00 5,10 2,40
550.009
Standard request
9,00 6,10 2,40
550.010
Standard request
10,00 7,10 2,40
550.012
Standard request
12,00 9,10 2,40
550.014
Standard request
14,00 9,50 3,60
550.015
Standard request
15,00 10,50 3,60
550.016
Standard request
16,00 11,50 3,60
550.018
Standard request
18,00 13,50 3,60
550.020
Standard request
20,00 15,50 3,60
550.022
Standard request
22,00 17,50 3,60
550.025
Standard request
25,00 18,80 4,80
550.028
Standard request
28,00 21,80 4,80
550.030
Standard request
30,00 23,80 4,80
550.032
Standard request
32,00 25,80 4,80
550.035
Standard request
35,00 28,80 4,80
550.038
Standard request
38,00 28,60 7,10
550.040
Standard request
40,00 33,80 4,80
550.042
Standard request
42,00 35,80 4,80
550.045
Standard request
45,00 38,80 4,80
550.048
Standard request
48,00 38,60 7,10
550.050
Standard request
50,00 40,60 7,10
550.052
Standard request
52,00 42,60 7,10
550.055
Standard request
55,00 45,60 7,10
550.058
Standard request
58,00 48,60 7,10
550.060
Standard request
60,00 50,60 7,10
550.062
Standard request
62,00 52,60 7,10
550.063
Standard request
63,00 53,60 7,10
550.065
Standard request
65,00 55,60 7,10
550.070
Standard request
70,00 60,60 7,10
550.072
Standard request
72,00 62,60 7,10
550.075
Standard request
75,00 65,60 7,10
550.078
Standard request
78,00 68,60 7,10
550.080
Standard request
80,00 70,60 7,10
550.082
Standard request
82,00 72,60 7,10
550.085
Standard request
85,00 75,60 7,10
550.090
Standard request
90,00 80,60 7,10
550.095
Standard request
95,00 85,60 7,10
550.100
Standard request
100,00 90,60 7,10
550.105
Standard request
105,00 95,60 7,10
550.110
Standard request
110,00 100,60 7,10
550.115
Standard request
115,00 105,60 7,10
550.120
Standard request
120,00 110,60 7,10
550.125
Standard request
125,00 112,80 9,50
550.130
Standard request
130,00 117,80 9,50
550.135
Standard request
135,00 122,80 9,50
550.140
Standard request
140,00 127,80 9,50
550.145
Standard request
145,00 132,80 9,50
550.150
Standard request
150,00 137,80 9,50
550.155
Standard request
155,00 142,80 9,50
550.160
Standard request
160,00 147,80 9,50
550.165
Standard request
165,00 152,80 9,50
550.170
Standard request
170,00 157,80 9,50
550.175
Standard request
175,00 162,80 9,50
550.180
Standard request
180,00 167,80 9,50
550.190
Standard request
190,00 177,80 9,50
550.200
Standard request
200,00 187,80 9,50
550.210
Standard request
210,00 197,80 9,50
550.220
Standard request
220,00 207,80 9,50
550.230
Standard request
230,00 217,80 9,50
550.240
Standard request
240,00 227,80 9,50
550.250
Standard request
250,00 237,80 9,50
550.260
Standard request
260,00 247,80 9,50
550.270
Standard request
270,00 257,80 9,50
550.280
Standard request
280,00 267,80 9,50
550.290
Standard request
290,00 277,80 9,50
550.300
Standard request
300,00 287,80 9,50
550.310
Standard request
310,00 297,80 9,50
550.320
Standard request
320,00 307,80 9,50
550.330
Standard request
330,00 317,80 9,50
550.340
Standard request
340,00 327,80 9,50
550.350
Standard request
350,00 337,80 9,50
550.360
Standard request
360,00 347,80 9,50
550.370
Standard request
370,00 357,80 9,50
550.380
Standard request
380,00 367,80 9,50
550.390
Standard request
390,00 377,80 9,50
550.400
Standard request
400,00 387,80 9,50
550.410
Standard request
410,00 397,80 9,50
550.420
Standard request
420,00 407,80 9,50
550.430
Standard request
430,00 417,80 9,50
550.440
Standard request
440,00 427,80 9,50
550.450
Standard request
450,00 437,80 9,50
550.460
Standard request
460,00 447,80 9,50
550.470
Standard request
470,00 457,80 9,50
550.480
Standard request
480,00 467,80 9,50
550.490
Standard request
490,00 477,80 9,50
550.500
Standard request
500,00 487,80 9,50
550.550
Standard request
550,00 537,80 9,50
550.600
Standard request
600,00 587,80 9,50
550.650
Standard request
650,00 637,80 9,50
550.700
Standard request
700,00 685 10
550.750
Standard request
750,00 735 10
550.800
Standard request
800,00 785 10
550.850
Standard request
850,00 835 10
550.900
Standard request
900,00 885 10
550.950
Standard request
950,00 935 10