BECA 115
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 |
| 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
Steel
Stainless steel
Dimensions
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
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 |
|
115.1E202
|
M4 | 7,00 | 5,40 | 4,50 | 0,30 | 1,00 | 3,40 | 1270 |
|
115.1E203
|
M5 | 9,00 | 6,80 | 5,70 | 0,30 | 1,00 | 4,50 | 1400 |
|
115.1E303
|
M5 | 10,00 | 7,00 | 5,60 | 0,30 | 1,00 | 4,50 | 1780 |
|
115.1E204
|
M5 | 10,00 | 7,40 | 5,70 | 0,30 | 1,00 | 4,50 | 1510 |
|
115.1E206
|
M6 | 10,00 | 8,00 | 6,70 | 0,30 | 1,00 | 4,70 | 1120 |
|
115.1E304
|
M6 | 11,00 | 8,00 | 6,60 | 0,30 | 1,00 | 4,70 | 1680 |
|
115.1E207
|
M6 | 11,00 | 8,20 | 6,70 | 0,30 | 1,00 | 4,70 | 1480 |
|
115.1E208
|
M6 | 11,00 | 8,20 | 6,70 | 0,30 | 2,50 | 4,70 | 1480 |
|
115.1E306
|
M6 | 11,40 | 8,40 | 7,00 | 0,30 | 1,00 | 4,70 | 1540 |
|
115.1E307
|
M8 | 13,00 | 10,00 | 8,60 | 0,30 | 1,00 | 6,40 | 1330 |
|
115.1E212
|
M8 | 13,00 | 10,00 | 8,70 | 0,30 | 1,00 | 6,40 | 1330 |
|
115.1E004
|
BSW 1/4 | 13,21 | 8,00 | 6,86 | 0,20 / 0,38 | 1,22 | 4,70 | 1950 |
|
115.1E305
|
M6 | 13,27 | 8,00 | 6,85 | 0,30 | 1,30 | 4,70 | 1970 |
|
115.1E215
|
M8.5 | 13,30 | 10,50 | 9,30 | 0,30 | 1,00 | 6,90 | 1200 |
|
115.1E005
|
BSW 1/4 | 13,34 | 9,53 | 6,99 | 0,20 / 0,38 | 1,22 | 4,70 | 1680 |
|
115.1E006
|
BSW 5/16 | 13,34 | 9,53 | 8,31 | 0,20 / 0,38 | 1,22 | 6,10 | 1700 |
|
115.1E211
|
M8 | 13,40 | 9,40 | 8,50 | 0,30 | 1,00 | 6,40 | 1780 |
|
115.1E213
|
M8 | 14,00 | 10,40 | 8,70 | 0,30 | 1,00 | 6,40 | 1510 |
|
115.1E007
|
BSW 5/16 | 14,22 | 10,04 | 8,64 | 0,20 / 0,38 | 1,22 | 6,10 | 1750 |
|
115.1E214
|
M8 | 16,00 | 10,40 | 8,70 | 0,30 | 1,00 | 6,40 | 2150 |
|
115.1E216
|
M10 | 16,00 | 12,00 | 10,35 | 0,40 | 2,00 | 8,56 | 1470 |
|
115.1E217
|
M10 | 16,00 | 12,40 | 10,70 | 0,40 | 1,50 | 8,56 | 1300 |
|
115.1E219
|
M11 | 16,30 | 12,70 | 11,40 | 0,40 | 1,50 | 9,80 | 1280 |
|
115.1E310
|
M10 | 17,00 | 12,10 | 10,70 | 0,30 | 1,50 | 8,56 | 1730 |
|
115.1E218
|
M10 | 18,00 | 12,40 | 10,70 | 0,40 | 1,50 | 8,56 | 1880 |
|
115.1E222
|
M12 | 18,00 | 14,40 | 12,70 | 0,40 | 1,50 | 9,73 | 1150 |
|
115.1E312
|
M11 | 18,10 | 13,20 | 11,80 | 0,30 | 1,50 | 9,80 | 1610 |
|
115.1E008
|
BSW 2/5 | 18,36 | 12,45 | 11,26 | 0,25/0,51 | 2,03 | 8,56 | 1950 |
|
115.1E220
|
M11 | 18,50 | 13,70 | 11,80 | 0,40 | 1,50 | 9,80 | 1540 |
|
115.1E226
|
M13.5 | 18,70 | 15,70 | 14,00 | 0,40 | 1,50 | 11,30 | 900 |
|
115.1E313
|
M12 | 19,00 | 14,10 | 12,70 | 0,30 | 1,50 | 9,73 | 1530 |
|
115.1E221
|
M11 | 19,10 | 13,50 | 11,80 | 0,40 | 1,50 | 9,80 | 1760 |
|
115.1E223
|
M12 | 20,00 | 14,40 | 12,70 | 0,40 | 1,50 | 9,73 | 1680 |
|
115.1E021
|
BSW 1/2 - BSP 1/4 | 20,57 | 15,21 | 13,74 | 0,25/0,51 | 2,03 | 11,45 | 1550 |
|
115.1E227
|
M14 | 22,00 | 16,40 | 14,70 | 0,40 | 1,50 | 11,38 | 1510 |
|
115.1E010
|
BSW 9/16 | 22,23 | 16,39 | 14,86 | 0,25/0,51 | 2,03 | 11,58 | 1560 |
|
115.1E317
|
M16 | 23,00 | 18,10 | 16,70 | 0,30 | 1,50 | 13,41 | 1240 |
|
115.1E318
|
M17 | 23,70 | 18,80 | 17,40 | 0,40 | 1,50 | 13,08 | 1200 |
|
115.1E023
|
BSP 3/8 | 23,80 | 18,75 | 17,28 | 0,25/0,51 | 2,03 | 14,96 | 1230 |
|
115.1E229
|
M16 | 24,00 | 18,40 | 16,70 | 0,40 | 1,50 | 13,41 | 1370 |
|
115.1E230
|
M17 | 24,00 | 19,20 | 17,40 | 0,40 | 1,50 | 13,08 | 1150 |
|
115.1E011
|
BSW 5/8 | 25,40 | 18,75 | 16,51 | 0,25/0,51 | 2,03 | 12,90 | 1560 |
|
115.1E012
|
BSW 11/16 | 25,40 | 19,69 | 18,16 | 0,25/0,51 | 2,34 | 14,50 | 1310 |
|
115.1E232
|
M18 | 26,00 | 20,40 | 18,70 | 0,40 | 1,50 | 14,76 | 1260 |
|
115.1E024
|
BSW 3/4 | 26,92 | 21,21 | 19,69 | 0,25/0,51 | 2,34 | 15,80 | 1230 |
|
115.1E316
|
M14 | 27,00 | 16,10 | 14,70 | 0,30 | 1,50 | 11,38 | 1370 |
|
115.1E320
|
M18 | 27,00 | 20,40 | 18,70 | 0,30 | 2,00 | 14,76 | 1450 |
|
115.1E233
|
M20 | 28,00 | 22,50 | 20,70 | 0,40 | 1,50 | 16,76 | 1140 |
|
115.1E235
|
M22 | 28,00 | 24,20 | 22,50 | 0,40 | 1,50 | 18,74 | 760 |
|
115.1E025
|
BSW 13/16 - BSP 1/2 | 28,58 | 23,01 | 21,54 | 0,25/0,51 | 2,34 | 18,64 | 1120 |
|
115.1E321
|
M20 | 29,00 | 22,40 | 20,70 | 0,30 | 2,00 | 16,76 | 1340 |
|
115.1E236
|
M22 | 30,00 | 24,40 | 22,70 | 0,40 | 2,00 | 18,74 | 1080 |
|
115.1E237
|
M22 | 30,00 | 24,40 | 22,70 | 0,40 | 3,00 | 18,74 | 1080 |
|
115.1E324
|
M22 | 31,00 | 24,40 | 22,70 | 0,30 | 2,00 | 18,74 | 1240 |
|
115.1E026
|
BSW 7/8 - BSP 5/8 | 31,75 | 24,97 | 23,49 | 0,25/0,51 | 2,34 | 20,60 | 1240 |
|
115.1E238
|
M24 | 32,00 | 26,40 | 24,70 | 0,40 | 2,00 | 20,11 | 1000 |
|
115.1E326
|
M24 | 33,00 | 26,40 | 24,70 | 0,30 | 2,00 | 20,11 | 1160 |
|
115.1E013
|
BSW 15/16 | 33,27 | 26,04 | 24,26 | 0,25/0,51 | 2,34 | 20,20 | 1275 |
|
115.1E027
|
BSW 1 - BSP 3/4 | 34,93 | 28,53 | 27,05 | 0,25/0,51 | 2,34 | 24,13 | 1050 |
|
115.1E239
|
M26 | 35,00 | 28,40 | 26,70 | 0,40 | 2,00 | 22,30 | 1090 |
|
115.1E327
|
M26 | 35,30 | 28,70 | 27,00 | 0,40 | 2,00 | 22,30 | 1080 |
|
115.1E029
|
BSW 1 3/16 - BSP 7/8 | 38,10 | 32,29 | 30,81 | 0,25/0,51 | 2,34 | 27,89 | 860 |
|
115.1E028
|
BSW 1 1/16 | 38,61 | 30,61 | 27,82 | 0,25/0,51 | 2,34 | 22,90 | 1210 |
|
115.1E015
|
BSW 1 1/4 | 41,40 | 35,69 | 32,64 | 0,25/0,51 | 3,25 | 27,10 | 775 |
|
115.1E030
|
BSW 1 5/16 - BSP 1 | 42,80 | 36,88 | 33,89 | 0,25/0,51 | 3,25 | 30,30 | 780 |
|
115.1E031
|
BSW 1 5/16 - BSP 1 | 42,80 | 36,88 | 33,89 | 0,25/0,51 | 2,34 | 30,30 | 780 |
|
115.1E245
|
M36 | 46,00 | 38,80 | 36,70 | 0,40 | 2,00 | 31,10 | 890 |
|
115.1E017
|
BSW 1 1/2 | 47,75 | 42,04 | 38,96 | 0,25/0,51 | 3,25 | 32,70 | 660 |
|
115.1E333
|
M36 | 48,00 | 39,60 | 37,00 | 0,40 | 2,50 | 31,10 | 1010 |
|
115.1E032
|
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
|
M42 | 53,00 | 44,40 | 42,70 | 0,40 | 3,00 | 35,60 | 930 |
|
115.1E335
|
M42 | 54,00 | 45,60 | 43,00 | 0,40 | 2,50 | 36,50 | 890 |
|
115.1E018
|
BSW 1 3/4 | 57,15 | 48,39 | 45,34 | 0,25/0,51 | 3,25 | 37,90 | 870 |
|
115.1E033
|
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
|
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
|
BSW 2 1/8 | 70,36 | 61,09 | 58,04 | 0,25/0,51 | 3,25 | 50,80 | 740 |
|
115.1E036
|
BSP 2 | 73,03 | 63,63 | 60,58 | 0,25/0,51 | 3,25 | 56,67 | 720 |
|
115.1E037
|
BSW 2 1/2 | 77,22 | 67,44 | 64,39 | 0,25/0,51 | 3,25 | 72,20 | 750 |