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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

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
743.006
Standard request
6,00 10,90 2,20
741.006
Standard request
6,00 13,50 3,20
743.008
Standard request
8,00 12,90 2,20
741.008
Standard request
8,00 15,50 3,20
743.010
Standard request
10,00 14,90 2,20
741.010
Standard request
10,00 17,50 3,20
743.012
Standard request
12,00 16,90 2,20
741.012
Standard request
12,00 19,50 3,20
743.014
Standard request
14,00 18,90 2,20
741.014
Standard request
14,00 21,50 3,20
743.015
Standard request
15,00 19,90 2,20
741.015
Standard request
15,00 22,50 3,20
743.016
Standard request
16,00 20,90 2,20
741.016
Standard request
16,00 23,50 3,20
743.018
Standard request
18,00 22,90 2,20
741.018
Standard request
18,00 25,50 3,20
743.020
Standard request
20,00 27,50 3,20
741.020
Standard request
20,00 31,00 4,20
743.022
Standard request
22,00 29,50 3,20
741.022
Standard request
22,00 33,00 4,20
743.025
Standard request
25,00 32,50 3,20
741.025
Standard request
25,00 36,00 4,20
743.028
Standard request
28,00 35,50 3,20
741.028
Standard request
28,00 39,00 4,20
743.030
Standard request
30,00 37,50 3,20
741.030
Standard request
30,00 41,00 4,20
743.032
Standard request
32,00 39,50 3,20
741.032
Standard request
32,00 43,00 4,20
743.035
Standard request
35,00 42,50 3,20
741.035
Standard request
35,00 46,00 4,20
743.036
Standard request
36,00 43,50 3,20
741.036
Standard request
36,00 47,00 4,20
743.038
Standard request
38,00 49,00 4,20
741.038
Standard request
38,00 53,50 6,30
743.040
Standard request
40,00 51,00 4,20
741.040
Standard request
40,00 55,50 6,30
743.042
Standard request
42,00 53,00 4,20
741.042
Standard request
42,00 57,50 6,30
743.045
Standard request
45,00 56,00 4,20
741.045
Standard request
45,00 60,50 6,30
743.048
Standard request
48,00 59,00 4,20
741.048
Standard request
48,00 63,50 6,30
743.050
Standard request
50,00 61,00 4,20
741.050
Standard request
50,00 65,50 6,30
743.052
Standard request
52,00 63,00 4,20
741.052
Standard request
52,00 67,50 6,30
743.055
Standard request
55,00 66,00 4,20
741.055
Standard request
55,00 70,50 6,30
743.056
Standard request
56,00 67,00 4,20
741.056
Standard request
56,00 71,50 6,30
743.058
Standard request
58,00 69,00 4,20
741.058
Standard request
58,00 73,50 6,30
743.060
Standard request
60,00 71,00 4,20
741.060
Standard request
60,00 75,50 6,30
743.062
Standard request
62,00 73,00 4,20
741.062
Standard request
62,00 77,50 6,30
743.063
Standard request
63,00 74,00 4,20
741.063
Standard request
63,00 78,50 6,30
743.2063
Standard request
63,00 78,50 6,30
743.065
Standard request
65,00 76,00 4,20
741.065
Standard request
65,00 80,50 6,30
743.068
Standard request
68,00 79,00 4,20
741.068
Standard request
68,00 83,50 6,30
743.070
Standard request
70,00 81,00 4,20
741.070
Standard request
70,00 85,50 6,30
743.075
Standard request
75,00 86,00 4,20
741.075
Standard request
75,00 90,50 6,30
743.080
Standard request
80,00 91,00 4,20
741.080
Standard request
80,00 95,50 6,30
743.085
Standard request
85,00 96,00 4,20
741.085
Standard request
85,00 100,50 6,30
743.090
Standard request
90,00 101,00 4,20
741.090
Standard request
90,00 105,50 6,30
743.095
Standard request
95,00 106,00 4,20
741.095
Standard request
95,00 110,50 6,30
743.100
Standard request
100,00 111,00 4,20
741.100
Standard request
100,00 115,50 6,30
743.105
Standard request
105,00 116,00 4,20
741.105
Standard request
105,00 120,50 6,30
743.110
Standard request
110,00 121,00 4,20
741.110
Standard request
110,00 125,50 6,30
743.115
Standard request
115,00 126,00 4,20
741.115
Standard request
115,00 130,50 6,30
743.120
Standard request
120,00 131,00 4,20
741.120
Standard request
120,00 135,50 6,30
743.125
Standard request
125,00 136,00 4,20
741.125
Standard request
125,00 140,50 6,30
743.130
Standard request
130,00 141,00 4,20
741.130
Standard request
130,00 145,50 6,30
743.135
Standard request
135,00 146,00 4,20
741.135
Standard request
135,00 150,50 6,30
743.140
Standard request
140,00 151,00 4,20
741.140
Standard request
140,00 155,50 6,30
743.145
Standard request
145,00 156,00 4,20
741.145
Standard request
145,00 160,50 6,30
743.150
Standard request
150,00 161,00 4,20
741.150
Standard request
150,00 165,50 6,30
743.155
Standard request
155,00 166,00 4,20
741.155
Standard request
155,00 170,50 6,30
743.160
Standard request
160,00 171,00 4,20
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