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BECA 741 - 743

BECA 741 - 743
BECA 741 - 743
beca_741_3d_v1
beca_741_3d_v2

Description

The BECA 741 - 743 roto seals are single or double acting rod rotary seals composed of a filled PTFE grooved friction ring and a pre-tightened rubber O'Ring.

Advantages

Low friction coefficient; no stick-slip effect on start up
Excellent abrasion and extrusion resistance
The grooves provide an integrated lubrication system
Excellent dimensional stability

Technical data

Temperature

-30°C/+200°C

Pressure

30 MPa

Speed

2 m/s

Medias

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

Applications

Rotary distributors
Handlers
Hydraulic motors

Materials

Friction ring

Bronze-filled PTFE
Carbon-filled PTFE
Virgin PTFE

O'Ring

NBR 70 Shore A
FKM 70 Shore A

Dimensions
Installation dimensions
Materials
Technical data

Dimensions

743.006, 741.006, 743.008, 741.008, 743.010, 741.010, 743.012, 741.012, 743.014, 741.014, 743.015, 741.015, 743.016, 741.016, 743.018, 741.018, 743.020, 741.020, 743.022, 741.022, 743.025, 741.025, 743.028, 741.028, 743.030, 741.030, 743.032, 741.032, 743.035, 741.035, 743.036, 741.036, 743.038, 741.038, 743.040, 741.040, 743.042, 741.042, 743.045, 741.045, 743.048, 741.048, 743.050, 741.050, 743.052, 741.052, 743.055, 741.055, 743.056, 741.056, 743.058, 741.058, 743.060, 741.060, 743.062, 741.062, 743.063, 741.063, 743.2063, 743.065, 741.065, 743.068, 741.068, 743.070, 741.070, 743.075, 741.075, 743.080, 741.080, 743.085, 741.085, 743.090, 741.090, 743.095, 741.095, 743.100, 741.100, 743.105, 741.105, 743.110, 741.110, 743.115, 741.115, 743.120, 741.120, 743.125, 741.125, 743.130, 741.130, 743.135, 741.135, 743.140, 741.140, 743.145, 741.145, 743.150, 741.150, 743.155, 741.155, 743.160, 741.160, 743.165, 741.165, 743.170, 741.170, 743.175, 741.175, 743.180, 741.180, 743.185, 741.185, 743.190, 741.190, 743.195, 741.195, 743.200, 741.200, 743.205, 741.205, 743.210, 741.210, 743.215, 741.215, 743.220, 741.220, 743.230, 741.230, 743.240, 741.240, 743.250, 741.250, 743.260, 741.260, 743.270, 741.270, 743.280, 741.280, 743.290, 741.290, 743.300, 741.300, 743.310, 741.310, 743.320, 741.320, 743.330, 741.330, 743.340, 741.340, 743.350, 741.350, 743.360, 741.360, 743.370, 741.370, 743.380, 741.380, 743.390, 741.390, 743.400, 741.400, 743.450, 741.450, 743.500, 741.500, 743.550, 741.550, 743.600, 741.600, 743.650, 741.650, 743.700, 741.700, 743.750, 741.750, 743.800, 741.800, 743.850, 741.850, 743.900, 741.900, 743.950, 741.950
Installation drawingLogement Gorge Rotojoint de tige - Housing Groove Rod rotoseal - BECA 741 - 743

Installation dimensions

Housing Groove Rod Rotoseal - BECA 741 - 743

Installation dimensions

Rod diameter
Ød1 f8/h9
Groove diameter Groove width Radial section O'Ring
cross-section
Number
of grooves
BECA 743
Standard
series
BECA 741
Heavy-duty
series
ØD1 H9 L1 0/+0.20 S Ød2
6.0 - 18.9 --- d1 + 4.90 2.20 2.45 1.78 1
19.0 - 37.9 6.0 - 18.9 d1 + 7.50 3.20 3.75 2.62 1
38.0 - 199.9 19.0 - 37.9 d1 + 11.00 4.20 5.50 3.53 2
200.0 - 255.9 38.0 - 199.9 d1 + 15.50 6.30 7.75 5.33 2
256.0 - 649.9 200.0 - 255.9 d1 + 21.00 8.10 10.50 6.99 2
650.0 - 999.9 256.0 - 649.9 d1 + 28.00 9.50 14.00 8.40 2

For special applications > 30 MPa, we recommend using an H8/f8 tolerance (groove/rod) or selecting other more suitable materials. Please contact our experts.

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
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
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

Other grades of materials are available depending on your specificities.

Technical data

Housing Groove Rod Rotoseal - BECA 741 - 743

Extrusion gaps

Radial section
S
Radial extrusion gap
F/2
10 MPa 20 MPa 30 MPa
2.45 0.15 0.10 0.05
3.75 0.20 0.15 0.10
5.50 0.25 0.20 0.15
7.75 0.30 0.25 0.20
10.50 0.30 0.25 0.20
14.00 0.45 0.30 0.25

Surface roughness

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

Chamfers and radius

Radial section
S
Radius
R1
Radius
R2
Chamfer
C
2.45 0.20 0.40 2.00
3.75 0.20 0.60 2.50
5.50 0.20 1.00 3.50
7.75 0.20 1.30 5.00
10.50 0.20 1.80 6.50
14.00 0.20 2.50 7.50
183 dimensions found
741.160
Standard request
160,00 175,50 6,30
743.165
Standard request
165,00 176,00 4,20
741.165
Standard request
165,00 180,50 6,30
743.170
Standard request
170,00 181,00 4,20
741.170
Standard request
170,00 185,50 6,30
743.175
Standard request
175,00 186,00 4,20
741.175
Standard request
175,00 190,50 6,30
743.180
Standard request
180,00 191,00 4,20
741.180
Standard request
180,00 195,50 6,30
743.185
Standard request
185,00 196,00 4,20
741.185
Standard request
185,00 200,50 6,30
743.190
Standard request
190,00 201,00 4,20
741.190
Standard request
190,00 205,50 6,30
743.195
Standard request
195,00 206,00 4,20
741.195
Standard request
195,00 210,50 6,30
743.200
Standard request
200,00 215,50 6,30
741.200
Standard request
200,00 221,00 8,10
743.205
Standard request
205,00 220,50 6,30
741.205
Standard request
205,00 226,00 8,10
743.210
Standard request
210,00 225,50 6,30
741.210
Standard request
210,00 231,00 8,10
743.215
Standard request
215,00 230,50 6,30
741.215
Standard request
215,00 236,00 8,10
743.220
Standard request
220,00 235,50 6,30
741.220
Standard request
220,00 241,00 8,10
743.230
Standard request
230,00 245,50 6,30
741.230
Standard request
230,00 251,00 8,10
743.240
Standard request
240,00 255,50 6,30
741.240
Standard request
240,00 261,00 8,10
743.250
Standard request
250,00 265,50 6,30
741.250
Standard request
250,00 271,00 8,10
743.260
Standard request
260,00 281,00 8,10
741.260
Standard request
260,00 288,00 9,50
743.270
Standard request
270,00 291,00 8,10
741.270
Standard request
270,00 298,00 9,50
743.280
Standard request
280,00 301,00 8,10
741.280
Standard request
280,00 308,00 9,50
743.290
Standard request
290,00 311,00 8,10
741.290
Standard request
290,00 318,00 9,50
743.300
Standard request
300,00 321,00 8,10
741.300
Standard request
300,00 328,00 9,50
743.310
Standard request
310,00 331,00 8,10
741.310
Standard request
310,00 338,00 9,50
743.320
Standard request
320,00 341,00 8,10
741.320
Standard request
320,00 348,00 9,50
743.330
Standard request
330,00 351,00 8,10
741.330
Standard request
330,00 358,00 9,50
743.340
Standard request
340,00 361,00 8,10
741.340
Standard request
340,00 368,00 9,50
743.350
Standard request
350,00 371,00 8,10
741.350
Standard request
350,00 378,00 9,50
743.360
Standard request
360,00 381,00 8,10
741.360
Standard request
360,00 388,00 9,50
743.370
Standard request
370,00 391,00 8,10
741.370
Standard request
370,00 398,00 9,50
743.380
Standard request
380,00 401,00 8,10
741.380
Standard request
380,00 408,00 9,50
743.390
Standard request
390,00 411,00 8,10
741.390
Standard request
390,00 418,00 9,50
743.400
Standard request
400,00 421,00 8,10
741.400
Standard request
400,00 428,00 9,50
743.450
Standard request
450,00 471,00 8,10
741.450
Standard request
450,00 478,00 9,50
743.500
Standard request
500,00 521,00 8,10
741.500
Standard request
500,00 528,00 9,50
743.550
Standard request
550,00 571,00 8,10
741.550
Standard request
550,00 578,00 9,50
743.600
Standard request
600,00 621,00 8,10
741.600
Standard request
600,00 628,00 9,50
743.650
Standard request
650,00 678,00 9,50
741.650
Standard request
650,00 678,00 9,50
743.700
Standard request
700,00 728,00 9,50
741.700
Standard request
700,00 728,00 9,50
743.750
Standard request
750,00 778,00 9,50
741.750
Standard request
750,00 778,00 9,50
743.800
Standard request
800,00 828,00 9,50
741.800
Standard request
800,00 828,00 9,50
743.850
Standard request
850,00 878,00 9,50
741.850
Standard request
850,00 878,00 9,50
743.900
Standard request
900,00 928,00 9,50
741.900
Standard request
900,00 928,00 9,50
743.950
Standard request
950,00 978,00 9,50
741.950
Standard request
950,00 978,00 9,50
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