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BECA 841 - 843

BECA 841 - 843
BECA 841 - 843
beca_841_3d_v1
beca_841_3d_v2

Description

The BECA 841 - 843 roto seals are single or double acting piston 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

843.008, 843.009, 843.010, 843.012, 841.014, 843.014, 841.015, 843.015, 841.016, 843.016, 841.018, 843.018, 841.020, 843.020, 841.022, 843.022, 841.025, 843.025, 841.028, 843.028, 841.030, 843.030, 841.032, 843.032, 841.035, 843.035, 841.038, 843.038, 841.040, 843.040, 841.042, 843.042, 841.045, 843.045, 841.048, 843.048, 841.050, 843.050, 841.052, 843.052, 841.055, 843.055, 841.058, 843.058, 841.060, 843.060, 841.062, 843.062, 841.063, 843.063, 841.065, 843.065, 841.070, 843.070, 841.072, 843.072, 841.075, 843.075, 841.078, 843.078, 841.080, 843.080, 841.082, 843.082, 841.085, 843.085, 841.090, 843.090, 841.095, 843.095, 841.100, 843.100, 841.105, 843.105, 841.110, 843.110, 841.115, 843.115, 841.120, 843.120, 841.125, 843.125, 841.130, 843.130, 841.135, 843.135, 841.140, 843.140, 841.145, 843.145, 841.150, 843.150, 841.155, 843.155, 841.160, 843.160, 841.165, 843.165, 841.170, 843.170, 841.175, 843.175, 841.180, 843.180, 841.190, 843.190, 841.200, 843.200, 841.210, 843.210, 841.220, 843.220, 841.230, 843.230, 841.240, 843.240, 841.250, 843.250, 841.260, 843.260, 841.270, 843.270, 841.280, 843.280, 841.290, 843.290, 841.300, 843.300, 841.310, 843.310, 841.320, 843.320, 841.330, 843.330, 841.340, 843.340, 841.350, 843.350, 841.360, 843.360, 841.370, 843.370, 841.380, 843.380, 841.390, 843.390, 841.400, 843.400, 841.410, 843.410, 841.420, 843.420, 841.430, 843.430, 841.440, 843.440, 841.450, 843.450, 841.460, 843.460, 841.470, 843.470, 841.480, 843.480, 841.490, 843.490, 841.500, 843.500, 841.550, 843.550, 841.600, 843.600, 841.650, 843.650, 843.700, 843.750, 843.800, 843.850, 843.900, 843.950
Installation drawingLogement Gorge Rotojoint de piston - Housing Groove Piston rotoseal - BECA 841 - 843

Installation dimensions

Housing Groove Piston Rotoseal - BECA 841 - 843

Installation dimensions

Bore diameter
ØD1 H9		 Groove diameter Groove width Radial section O'Ring
cross-section		 Number
of grooves
BECA 843
Standard
series		 BECA 841
Heavy-duty
series		 Ød1 h9 L1 0/+0.20 S Ød2
8.0 - 39.9 --- D1 - 4.90 2.20 2.45 1.78 1
40.0 - 79.9 14.0 - 39.9 D1 - 7.50 3.20 3.75 2.62 1
80.0 - 132.9 40.0 - 79.9 D1 - 11.00 4.20 5.50 3.53 2
133.0 - 329.9 80.0 - 132.9 D1 - 15.50 6.30 7.75 5.33 2
330.0 - 669.9 133.0 - 329.9 D1 - 21.00 8.10 10.50 6.99 2
670.0 - 999.9 330.0 - 669.9 D1 - 28.00 9.50 14.00 8.40 2

For special applications > 20 MPa, we recommend using an H8/f8 tolerance (bore/groove) 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 Piston Rotoseal - BECA 841 - 843

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
180 dimensions found
843.008
Standard request
 8,00 3,10 2,20
843.009
Standard request
 9,00 4,10 2,20
843.010
Standard request
 10,00 5,10 2,20
843.012
Standard request
 12,00 7,10 2,20
841.014
Standard request
 14,00 6,50 3,20
843.014
Standard request
 14,00 9,10 2,20
841.015
Standard request
 15,00 7,50 3,20
843.015
Standard request
 15,00 10,10 2,20
841.016
Standard request
 16,00 8,50 3,20
843.016
Standard request
 16,00 11,10 2,20
841.018
Standard request
 18,00 10,50 3,20
843.018
Standard request
 18,00 13,10 2,20
841.020
Standard request
 20,00 12,50 3,20
843.020
Standard request
 20,00 15,10 2,20
841.022
Standard request
 22,00 14,50 3,20
843.022
Standard request
 22,00 17,10 2,20
841.025
Standard request
 25,00 17,50 3,20
843.025
Standard request
 25,00 20,10 2,20
841.028
Standard request
 28,00 20,50 3,20
843.028
Standard request
 28,00 23,10 2,20
841.030
Standard request
 30,00 22,50 3,20
843.030
Standard request
 30,00 25,10 2,20
841.032
Standard request
 32,00 24,50 3,20
843.032
Standard request
 32,00 27,10 2,20
841.035
Standard request
 35,00 27,50 3,20
843.035
Standard request
 35,00 30,10 2,20
841.038
Standard request
 38,00 30,50 3,20
843.038
Standard request
 38,00 33,10 2,20
841.040
Standard request
 40,00 29,00 4,20
843.040
Standard request
 40,00 32,50 3,20
841.042
Standard request
 42,00 31,00 4,20
843.042
Standard request
 42,00 34,50 3,20
841.045
Standard request
 45,00 34,00 4,20
843.045
Standard request
 45,00 37,50 3,20
841.048
Standard request
 48,00 37,00 4,20
843.048
Standard request
 48,00 40,50 3,20
841.050
Standard request
 50,00 39,00 4,20
843.050
Standard request
 50,00 42,50 3,20
841.052
Standard request
 52,00 41,00 4,20
843.052
Standard request
 52,00 44,50 3,20
841.055
Standard request
 55,00 44,00 4,20
843.055
Standard request
 55,00 47,50 3,20
841.058
Standard request
 58,00 47,00 4,20
843.058
Standard request
 58,00 50,50 3,20
841.060
Standard request
 60,00 49,00 4,20
843.060
Standard request
 60,00 52,50 3,20
841.062
Standard request
 62,00 51,00 4,20
843.062
Standard request
 62,00 54,50 3,20
841.063
Standard request
 63,00 52,00 4,20
843.063
Standard request
 63,00 55,50 3,20
841.065
Standard request
 65,00 54,00 4,20
843.065
Standard request
 65,00 57,50 3,20
841.070
Standard request
 70,00 59,00 4,20
843.070
Standard request
 70,00 62,50 3,20
841.072
Standard request
 72,00 61,00 4,20
843.072
Standard request
 72,00 64,50 3,20
841.075
Standard request
 75,00 64,00 4,20
843.075
Standard request
 75,00 67,50 3,20
841.078
Standard request
 78,00 67,00 4,20
843.078
Standard request
 78,00 70,50 3,20
841.080
Standard request
 80,00 64,50 6,30
843.080
Standard request
 80,00 69,00 4,20
841.082
Standard request
 82,00 66,50 6,30
843.082
Standard request
 82,00 71,00 4,20
841.085
Standard request
 85,00 69,50 6,30
843.085
Standard request
 85,00 74,00 4,20
841.090
Standard request
 90,00 74,50 6,30
843.090
Standard request
 90,00 79,00 4,20
841.095
Standard request
 95,00 79,50 6,30
843.095
Standard request
 95,00 84,00 4,20
841.100
Standard request
 100,00 84,50 6,30
843.100
Standard request
 100,00 89,00 4,20
841.105
Standard request
 105,00 89,50 6,30
843.105
Standard request
 105,00 94,00 4,20
841.110
Standard request
 110,00 94,50 6,30
843.110
Standard request
 110,00 99,00 4,20
841.115
Standard request
 115,00 99,50 6,30
843.115
Standard request
 115,00 104,00 4,20
841.120
Standard request
 120,00 104,50 6,30
843.120
Standard request
 120,00 109,00 4,20
841.125
Standard request
 125,00 109,50 6,30
843.125
Standard request
 125,00 114,00 4,20
841.130
Standard request
 130,00 114,50 6,30
843.130
Standard request
 130,00 119,00 4,20
841.135
Standard request
 135,00 114,00 8,10
843.135
Standard request
 135,00 119,50 6,30
841.140
Standard request
 140,00 119,00 8,10
843.140
Standard request
 140,00 124,50 6,30
841.145
Standard request
 145,00 124,00 8,10
843.145
Standard request
 145,00 129,50 6,30
841.150
Standard request
 150,00 129,00 8,10
843.150
Standard request
 150,00 134,50 6,30
841.155
Standard request
 155,00 134,00 8,10
843.155
Standard request
 155,00 139,50 6,30
841.160
Standard request
 160,00 139,00 8,10
843.160
Standard request
 160,00 144,50 6,30
841.165
Standard request
 165,00 144,00 8,10
843.165
Standard request
 165,00 149,50 6,30
841.170
Standard request
 170,00 149,00 8,10
843.170
Standard request
 170,00 154,50 6,30
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