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BECA 157 - 158

BECA 157 - 158
BECA 157 - 158
beca_157_158_3d_v1
beca_157_158_3d_v2

Description

The BECA 157 - 158 profile is a double acting rod composite seal composed of a filled PTFE friction ring and two pre-tightened rubber O'Rings. It can be assembled in a groove according to standard ISO 7425/2. Option of connecting the seal to 1 or 2 back-up rings.

Advantages

Optimal sealing for separating two fluids
Low friction coefficient; no stick-slip effect
Excellent abrasion 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

50 MPa

Speed

2 m/s

Medias

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

Applications

Mobile machinery
Machine tools
Presses
Hydro-pneumatic suspension systems

Materials

Friction ring

Bronze-filled PTFE

O'Rings

NBR 70 Shore A

Dimensions
Installation dimensions
Materials
Technical data

Dimensions

157.018, 157.020, 157.022, 157.025, 157.028, 157.030, 157.032, 157.035, 157.036, 157.038, 157.040, 157.042, 157.045, 157.048, 157.050, 157.052, 157.055, 157.056, 157.058, 157.060, 157.062, 157.063, 157.065, 157.068, 157.070, 157.075, 157.080, 157.085, 157.090, 157.095, 157.100, 157.105, 157.110, 157.115, 157.120, 157.125, 157.130, 157.135, 157.140, 157.145, 157.150, 157.155, 157.160, 157.165, 157.170, 157.175, 157.180, 157.185, 157.190, 157.195, 157.200, 157.205, 157.210, 157.215, 157.220, 157.230, 157.240, 157.250, 157.260, 157.270, 157.280, 157.290, 157.300, 157.310, 157.320, 157.330, 157.340, 157.350, 157.360, 157.370, 157.380, 157.390, 157.400, 157.450, 157.500, 157.550, 157.600, 157.650, 157.700, 157.750, 157.800, 157.850, 157.900, 157.950
Installation drawingLogement Gorge Joint de tige - Housing Groove Gland Rod seal BECA 157 - 158

Installation dimensions

Housing Groove Gland Rod Seal - BECA 157 - 158

Installation dimensions

Rod diameter
Ød1 f8/h9		 Groove diameter Groove width Radial section O'Ring
cross-section		 O'Ring / X'Ring
cross-section
BECA 157
Standard series		 BECA 158
Extended series		 ØD1 H9 L1 0/+0.20 S Ød2.1 Ød2.2
19.0 - 37.9 18.0 - 450.0 d1 + 11.00 4.20 5.50 3.53 1.78
38.0 - 199.9 30.0 - 650.0 d1 + 15.50 6.30 7.75 5.33 1.78
200.0 - 255.9 105.0 - 999.9 d1 + 21.00 8.10 10.50 6.99 2.62
256.0 - 649.9 120.0 - 999.9 d1 + 24.50 8.10 12.25 6.99 2.62
650.0 - 999.9 285.0 - 999.9 d1 + 28.00 9.50 14.00 8.40 3.53
--- 650.0 - 999.9 d1 + 38.00 13.80 19.00 12.00 3.53

For special applications > 40 MPa, we recommend using an H8/f8 tolerance (groove/rod) or selecting other more suitable materials. Please contact our experts.

Materials

Friction ring O'Rings 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

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Gland Rod Seal - BECA 157 - 158

Extrusion gaps

Radial section
S		 Radial extrusion gap
F/2
10 MPa 20 MPa 40 MPa
5.50 0.25 0.15 0.10
7.75 0.30 0.20 0.15
10.50 0.30 0.20 0.15
12.25 0.30 0.20 0.15
14.00 0.45 0.30 0.25
19.00 0.55 0.40 0.35

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
5.50 0.30 1.00 3.00
7.75 0.30 1.30 3.00
10.50 0.30 1.80 5.00
12.25 0.30 1.80 6.00
14.00 0.30 2.50 8.00
19.00 0.30 3.00 10.00
84 dimensions found
157.018
Standard request
 18,00 29,00 4,20
157.020
Standard request
 20,00 31,00 4,20
157.022
Standard request
 22,00 33,00 4,20
157.025
Standard request
 25,00 36,00 4,20
157.028
Standard request
 28,00 39,00 4,20
157.030
Standard request
 30,00 41,00 4,20
157.032
Standard request
 32,00 43,00 4,20
157.035
Standard request
 35,00 46,00 4,20
157.036
Standard request
 36,00 47,00 4,20
157.038
Standard request
 38,00 53,50 6,30
157.040
Standard request
 40,00 55,50 6,30
157.042
Standard request
 42,00 57,50 6,30
157.045
Standard request
 45,00 60,50 6,30
157.048
Standard request
 48,00 63,50 6,30
157.050
Standard request
 50,00 65,50 6,30
157.052
Standard request
 52,00 67,50 6,30
157.055
Standard request
 55,00 70,50 6,30
157.056
Standard request
 56,00 71,50 6,30
157.058
Standard request
 58,00 73,50 6,30
157.060
Standard request
 60,00 75,50 6,30
157.062
Standard request
 62,00 77,50 6,30
157.063
Standard request
 63,00 78,50 6,30
157.065
Standard request
 65,00 80,50 6,30
157.068
Standard request
 68,00 83,50 6,30
157.070
Standard request
 70,00 85,50 6,30
157.075
Standard request
 75,00 90,50 6,30
157.080
Standard request
 80,00 95,50 6,30
157.085
Standard request
 85,00 100,50 6,30
157.090
Standard request
 90,00 105,50 6,30
157.095
Standard request
 95,00 110,50 6,30
157.100
Standard request
 100,00 115,50 6,30
157.105
Standard request
 105,00 120,50 6,30
157.110
Standard request
 110,00 125,50 6,30
157.115
Standard request
 115,00 130,50 6,30
157.120
Standard request
 120,00 135,50 6,30
157.125
Standard request
 125,00 140,50 6,30
157.130
Standard request
 130,00 145,50 6,30
157.135
Standard request
 135,00 150,50 6,30
157.140
Standard request
 140,00 155,50 6,30
157.145
Standard request
 145,00 160,50 6,30
157.150
Standard request
 150,00 165,50 6,30
157.155
Standard request
 155,00 170,50 6,30
157.160
Standard request
 160,00 175,50 6,30
157.165
Standard request
 165,00 180,50 6,30
157.170
Standard request
 170,00 185,50 6,30
157.175
Standard request
 175,00 190,50 6,30
157.180
Standard request
 180,00 195,50 6,30
157.185
Standard request
 185,00 200,50 6,30
157.190
Standard request
 190,00 205,50 6,30
157.195
Standard request
 195,00 210,50 6,30
157.200
Standard request
 200,00 221,00 8,10
157.205
Standard request
 205,00 226,00 8,10
157.210
Standard request
 210,00 231,00 8,10
157.215
Standard request
 215,00 236,00 8,10
157.220
Standard request
 220,00 241,00 8,10
157.230
Standard request
 230,00 251,00 8,10
157.240
Standard request
 240,00 261,00 8,10
157.250
Standard request
 250,00 271,00 8,10
157.260
Standard request
 260,00 284,50 8,10
157.270
Standard request
 270,00 294,50 8,10
157.280
Standard request
 280,00 304,50 8,10
157.290
Standard request
 290,00 314,50 8,10
157.300
Standard request
 300,00 324,50 8,10
157.310
Standard request
 310,00 334,50 8,10
157.320
Standard request
 320,00 344,50 8,10
157.330
Standard request
 330,00 354,50 8,10
157.340
Standard request
 340,00 364,50 8,10
157.350
Standard request
 350,00 374,50 8,10
157.360
Standard request
 360,00 384,50 8,10
157.370
Standard request
 370,00 394,50 8,10
157.380
Standard request
 380,00 404,50 8,10
157.390
Standard request
 390,00 414,50 8,10
157.400
Standard request
 400,00 424,50 8,10
157.450
Standard request
 450,00 474,50 8,10
157.500
Standard request
 500,00 524,50 8,10
157.550
Standard request
 550,00 574,50 8,10
157.600
Standard request
 600,00 624,50 8,10
157.650
Standard request
 650,00 678,00 9,50
157.700
Standard request
 700,00 728,00 9,50
157.750
Standard request
 750,00 778,00 9,50
157.800
Standard request
 800,00 828,00 9,50
157.850
Standard request
 850,00 878,00 9,50
157.900
Standard request
 900,00 928,00 9,50
157.950
Standard request
 950,00 978,00 9,50