EN
Telephone

+33 (0)2 51 42 13 76

Search
Quality & expertise
for your sealing needs

BECA 115

BECA 115
BECA 115
beca_115_3d_v1
beca_115_3d_v2

Description

The BECA 115 profile is a self-centring BS ring or bonded seal composed of a metal ring with a rectangular cross-section, the inside of which has a bonded and vulcanised rubber ring with a trapezoidal cross-section. Self-centring is through a thin membrane, in which the inside diameter is equal to the central diameter of the threading (without the thread).

Advantages

Economic solution
Precise positioning of the ring
Can be disassembled and reused
Reliable sealing at both high and low pressures
Reduced assembly time

Technical data

Temperature

-45°C/+200°C

Medias

Mineral hydraulic oils
Water
Water/oil emulsions
gas

Breaking resistance

540 MPa depending on the material selected

Applications

Sealing under the screw heads and bolts
General mechanics
Motors
Pipe fittings
Valves

Materials

Trapezoidal ring

NBR 70 - 90 Shore A
FKM 70 - 90 Shore A
HNBR 70 - 90 Shore A
EPDM 70 - 90 Shore A

Metal ring

Cadmium-plated steel
Stainless steel

Dimensions
Materials
Design guidelines

Dimensions

Installation drawingLogement Gorge Joint statique Bague BS - Housing Groove Static seal Bonded seal Usite ring - BECA 115

Materials

NBR

Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.

Chemical resistance Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, low-temperature alkaline and saline solutions
Water (up to +100°C max)
Compatibility issue Fuels with high aromatic content
Aromatic hydrocarbons (benzene)
Chlorinated hydrocarbons (trichlorethylene)
Polar solvents (ketone, acetone, acetic acid, ethylene-ester)
Strong acids
Glycol-based brake fluids
Atmospheric and ozone agents
Temperature range -30°C/+100°C

EPDM

As an Ethylene Propylene Diene Monomer copolymer, EPDM is commonly used for hot water taps, cooling systems, brake systems, dishwashers and washing machines.

Chemical resistance Hot water and steam up to +150°C
Glycol-based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5)
Organic and inorganic acids
Cleaning agents, sodium and potassium alkalis
Hydraulic fluids (HFD-R)
Silicone oils and greases
Polar solvents (alcohols, ketones and esters)
Atmospheric and ozone agents
Compatibility issue Mineral oils and greases
Hydrocarbons
Low impermeability to gas
Temperature range -45°C/+150°C

FKM

Depending on their structure and fluorine content, the chemical resistance and resistance to the cold in fluororubbers can vary. This FKM-based rubber is very often used for high-temperature hydraulics and pneumatics, for industrial valves, injection/fuel systems, motor seals and high-vacuum systems.

Chemical resistance Mineral oils and greases, ASTM n°1, IRM 902 and IRM 903 oils.
Fire-resistant liquids (HFD)
Silicone oils and greases
Mineral and vegetable oils and greases
Aliphatic hydrocarbons (propane, butane, petroleum)
Aromatic hydrocarbons (benzene, toluene)
Chlorinated hydrocarbons (trichlorethylene)
Fuel (including high alcohol content)
Atmospheric and ozone agents
Compatibility issue Glycol-based brake fluids
Ammonia gas
Organic acids with a low molecular weight (formic and acetic acids)
Temperature range -20°C/+200°C

HNBR

This HNBR-based rubber is obtained through selective hydrogenation of the NBR's butadiene groups. It is commonly used for power-assisted steering and for air conditioning.

Chemical resistance Aliphatic hydrocarbons
Mineral and vegetable oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Diluted acids, saline solutions and bases for operation at an average temperature
Water and steam up to +150°C
Atmospheric and ozone agents
Compatibility issue Chlorinated hydrocarbons
Polar solvents (ketones, esters and ethers)
Strong acids
Temperature range -30°C/+150°C

Design guidelines

Housing Groove Static Seal Bonded Seal Usite Ring - BECA - 115

Counterbore L

Metric Counterbore ØL (mm)
M3 at M8.5 ØA +0.20
M9 at M33 ØA +0.40
M34 at M60 ØA +0.60

The overlapping of the metal ring (T) must be at least 0.70 mm and the overlapping of the rubber ring (S) must be at least 75% (S ≥ 0.75 x R).

Tightening torque

The tightening torque is a determining factor for the optimal operation of the BS ring. The table below sets out the required tightening torques.

Dimensions Torque (Nm)
Metric BSW BSP 1 ring 2 rings
up to M8 5/16 - 5.3 8.5
M10 3/8 1/8 7.1 11.4
M11 7/16 - 11.8 15.3
M12 1/2 1/4 15.8 20.5
M14 9/16 - 22.6 29.4
M16 5/8 3/8 30.5 39.7
M18 3/4 - 40.7 52.9
M20 13/16 1/2 56.5 67.8
M22 7/8 5/8 67.8 74.6
M24 1.0 3/4 73.4 73.4
from M27 1.1/16 - 79.0 79.0

Surface roughness

Roughness Contact surface area
Ra ≤ 3.0 µm
Rmax ≤ 15.0 µm
78 dimensions found
115.1E202
Standard request
M4 7,00 5,40 4,50 0,30 1,00 3,40 1270
115.1E203
Standard request
M5 9,00 6,80 5,70 0,30 1,00 4,50 1400
115.1E303
Standard request
M5 10,00 7,00 5,60 0,30 1,00 4,50 1780
115.1E204
Standard request
M5 10,00 7,40 5,70 0,30 1,00 4,50 1510
115.1E206
Standard request
M6 10,00 8,00 6,70 0,30 1,00 4,70 1120
115.1E304
Standard request
M6 11,00 8,00 6,60 0,30 1,00 4,70 1680
115.1E207
Standard request
M6 11,00 8,20 6,70 0,30 1,00 4,70 1480
115.1E208
Standard request
M6 11,00 8,20 6,70 0,30 2,50 4,70 1480
115.1E306
Standard request
M6 11,40 8,40 7,00 0,30 1,00 4,70 1540
115.1E307
Standard request
M8 13,00 10,00 8,60 0,30 1,00 6,40 1330
115.1E212
Standard request
M8 13,00 10,00 8,70 0,30 1,00 6,40 1330
115.1E004
Standard request
BSW 1/4 13,21 8,00 6,86 0,20 / 0,38 1,22 4,70 1950
115.1E305
Standard request
M6 13,27 8,00 6,85 0,30 1,30 4,70 1970
115.1E215
Standard request
M8.5 13,30 10,50 9,30 0,30 1,00 6,90 1200
115.1E005
Standard request
BSW 1/4 13,34 9,53 6,99 0,20 / 0,38 1,22 4,70 1680
115.1E006
Standard request
BSW 5/16 13,34 9,53 8,31 0,20 / 0,38 1,22 6,10 1700
115.1E211
Standard request
M8 13,40 9,40 8,50 0,30 1,00 6,40 1780
115.1E213
Standard request
M8 14,00 10,40 8,70 0,30 1,00 6,40 1510
115.1E007
Standard request
BSW 5/16 14,22 10,04 8,64 0,20 / 0,38 1,22 6,10 1750
115.1E214
Standard request
M8 16,00 10,40 8,70 0,30 1,00 6,40 2150
115.1E216
Standard request
M10 16,00 12,00 10,35 0,40 2,00 8,56 1470
115.1E217
Standard request
M10 16,00 12,40 10,70 0,40 1,50 8,56 1300
115.1E219
Standard request
M11 16,30 12,70 11,40 0,40 1,50 9,80 1280
115.1E310
Standard request
M10 17,00 12,10 10,70 0,30 1,50 8,56 1730
115.1E218
Standard request
M10 18,00 12,40 10,70 0,40 1,50 8,56 1880
115.1E222
Standard request
M12 18,00 14,40 12,70 0,40 1,50 9,73 1150
115.1E312
Standard request
M11 18,10 13,20 11,80 0,30 1,50 9,80 1610
115.1E008
Standard request
BSW 2/5 18,36 12,45 11,26 0,25/0,51 2,03 8,56 1950
115.1E220
Standard request
M11 18,50 13,70 11,80 0,40 1,50 9,80 1540
115.1E226
Standard request
M13.5 18,70 15,70 14,00 0,40 1,50 11,30 900
115.1E313
Standard request
M12 19,00 14,10 12,70 0,30 1,50 9,73 1530
115.1E221
Standard request
M11 19,10 13,50 11,80 0,40 1,50 9,80 1760
115.1E223
Standard request
M12 20,00 14,40 12,70 0,40 1,50 9,73 1680
115.1E021
Standard request
BSW 1/2 - BSP 1/4 20,57 15,21 13,74 0,25/0,51 2,03 11,45 1550
115.1E227
Standard request
M14 22,00 16,40 14,70 0,40 1,50 11,38 1510
115.1E010
Standard request
BSW 9/16 22,23 16,39 14,86 0,25/0,51 2,03 11,58 1560
115.1E317
Standard request
M16 23,00 18,10 16,70 0,30 1,50 13,41 1240
115.1E318
Standard request
M17 23,70 18,80 17,40 0,40 1,50 13,08 1200
115.1E023
Standard request
BSP 3/8 23,80 18,75 17,28 0,25/0,51 2,03 14,96 1230
115.1E229
Standard request
M16 24,00 18,40 16,70 0,40 1,50 13,41 1370
115.1E230
Standard request
M17 24,00 19,20 17,40 0,40 1,50 13,08 1150
115.1E011
Standard request
BSW 5/8 25,40 18,75 16,51 0,25/0,51 2,03 12,90 1560
115.1E012
Standard request
BSW 11/16 25,40 19,69 18,16 0,25/0,51 2,34 14,50 1310
115.1E232
Standard request
M18 26,00 20,40 18,70 0,40 1,50 14,76 1260
115.1E024
Standard request
BSW 3/4 26,92 21,21 19,69 0,25/0,51 2,34 15,80 1230
115.1E316
Standard request
M14 27,00 16,10 14,70 0,30 1,50 11,38 1370
115.1E320
Standard request
M18 27,00 20,40 18,70 0,30 2,00 14,76 1450
115.1E233
Standard request
M20 28,00 22,50 20,70 0,40 1,50 16,76 1140
115.1E235
Standard request
M22 28,00 24,20 22,50 0,40 1,50 18,74 760
115.1E025
Standard request
BSW 13/16 - BSP 1/2 28,58 23,01 21,54 0,25/0,51 2,34 18,64 1120
115.1E321
Standard request
M20 29,00 22,40 20,70 0,30 2,00 16,76 1340
115.1E236
Standard request
M22 30,00 24,40 22,70 0,40 2,00 18,74 1080
115.1E237
Standard request
M22 30,00 24,40 22,70 0,40 3,00 18,74 1080
115.1E324
Standard request
M22 31,00 24,40 22,70 0,30 2,00 18,74 1240
115.1E026
Standard request
BSW 7/8 - BSP 5/8 31,75 24,97 23,49 0,25/0,51 2,34 20,60 1240
115.1E238
Standard request
M24 32,00 26,40 24,70 0,40 2,00 20,11 1000
115.1E326
Standard request
M24 33,00 26,40 24,70 0,30 2,00 20,11 1160
115.1E013
Standard request
BSW 15/16 33,27 26,04 24,26 0,25/0,51 2,34 20,20 1275
115.1E027
Standard request
BSW 1 - BSP 3/4 34,93 28,53 27,05 0,25/0,51 2,34 24,13 1050
115.1E239
Standard request
M26 35,00 28,40 26,70 0,40 2,00 22,30 1090
115.1E327
Standard request
M26 35,30 28,70 27,00 0,40 2,00 22,30 1080
115.1E029
Standard request
BSW 1 3/16 - BSP 7/8 38,10 32,29 30,81 0,25/0,51 2,34 27,89 860
115.1E028
Standard request
BSW 1 1/16 38,61 30,61 27,82 0,25/0,51 2,34 22,90 1210
115.1E015
Standard request
BSW 1 1/4 41,40 35,69 32,64 0,25/0,51 3,25 27,10 775
115.1E030
Standard request
BSW 1 5/16 - BSP 1 42,80 36,88 33,89 0,25/0,51 3,25 30,30 780
115.1E031
Standard request
BSW 1 5/16 - BSP 1 42,80 36,88 33,89 0,25/0,51 2,34 30,30 780
115.1E245
Standard request
M36 46,00 38,80 36,70 0,40 2,00 31,10 890
115.1E017
Standard request
BSW 1 1/2 47,75 42,04 38,96 0,25/0,51 3,25 32,70 660
115.1E333
Standard request
M36 48,00 39,60 37,00 0,40 2,50 31,10 1010
115.1E032
Standard request
BSW 1 5/8 - BSP 1 1/4 52,38 45,93 42,93 0,25/0,51 3,25 38,96 690
115.1E247
Standard request
M42 53,00 44,40 42,70 0,40 3,00 35,60 930
115.1E335
Standard request
M42 54,00 45,60 43,00 0,40 2,50 36,50 890
115.1E018
Standard request
BSW 1 3/4 57,15 48,39 45,34 0,25/0,51 3,25 37,90 870
115.1E033
Standard request
BSW 1 7/8 - BSP 1 1/2 58,60 51,39 48,44 0,25/0,51 3,25 44,86 690
115.1E034
Standard request
BSW 2 1/8 - BSP 1 3/4 69,85 58,30 54,89 0,25/0,51 3,25 50,80 950
115.1E035
Standard request
BSW 2 1/8 70,36 61,09 58,04 0,25/0,51 3,25 50,80 740
115.1E036
Standard request
BSP 2 73,03 63,63 60,58 0,25/0,51 3,25 56,67 720
115.1E037
Standard request
BSW 2 1/2 77,22 67,44 64,39 0,25/0,51 3,25 72,20 750