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BECA 385

BECA 385
beca_385_3d_v1
beca_385_3d_v2

Description

The BECA 385 profile is a U-ring type single acting rod seal with asymmetrical rubber lips for low-pressure applications.

Advantages

Very good sealing at low pressures
Excellent wear resistance
Reduced size

Technical data

Temperature

-30°C/+200°C

Pressure

8 MPa

Speed

0.5 m/s

Medias

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

Applications

Material handling - Lifting
Presses
Hydraulic cylinders

Materials

NBR 80 Shore A
FKM 80 Shore A

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de tige - Housing Groove Gland Rod seal BECA 385

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
-40°C / +100°C with our low-temperature NBR

EPDM

As an Ethylene Propylene Diene Monomer copolymer, EPDM is a rubber 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 -50°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
-40°C / +200°C with our FKM GLT on request

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

ACM

Polymers containing ethyl acrylate (or butyl acrylate) have a small amount of monomer, which is necessary for cross-linking; ACM is a material with better heat resistance than NBR. It is often used for automatic gearboxes.

Chemical resistance Mineral oils (motor oils, gear box oils, ATF oils)
Atmospheric and ozone agents
Compatibility issue Glycol-based brake fluids (Dot 3 & 4)
Aromatic and chlorinated hydrocarbons
Water and steam
Acids, alkalis and amines.
Temperature range - 25°C to + 150°C

VMQ

This VMQ-based rubber is very often used in fuel systems.

Chemical resistance Animal and vegetable oils and greases
Water for operation at an average temperature
Diluted saline solutions
Atmospheric and ozone agents
Compatibility issue Superheated steam up to +120°C
Chlorinated hydrocarbons with a low molecular weight (trichlorethylene)
Aromatic hydrocarbons (benzene, toluene)
Temperature range -60°C/+200°C

The table below gives an overview of the physical, chemical and mechanical characteristics for each of the materials.

Characteristics/Materials ACM EPDM FKM HNBR NBR VMQ
Abrasion resistant 2 2 2 2 2 4
Resistance to acids 4 2 1 1 3 3
Chemical resistance 4 1 1 2 2 2
Resistance to cold 4 2 4 2 2 2
Dynamic properties 3 2 2 1 2 4
Electrical properties 3 2 4 3 3 1
Flame resistant 4 4 1 4 4 3
Heat resistant 1 2 1 1 2 1
Sealing water 1 2 2 2 2 4
Oil resistant 1 4 1 1 1 2
Ozone resistant 1 1 1 2 4 1
Tearing resistant 2 1 3 2 2 4
Traction resistant 3 1 1 1 2 4
Water/vapour resistant 4 1 3 1 2 3
Resistance to atmospheric agents 1 1 1 2 3 1

1. Excellent properties 2. Good properties 3. Average properties 4. Poor properties

Technical data

Housing Groove Gland Rod Seal - BECA 385

Extrusion gaps

Pressure
MPa
Radial extrusion gap
F/2
1.0 MPa 0.25
1.2 MPa 0.20
6.5 MPa 0.10
8.0 MPa 0.05

Surface roughness

Roughness Dynamic surface area Static surface area Groove flanks
Ra 0.1 - 0.4 µm ≤ 1.6 µm ≤ 3.2 µm
Rz 0.63 - 2.5 µm ≤ 6.3 µm ≤ 10.0 µm
Rmax 1.0 - 4.0 µm ≤ 10.0 µm ≤ 16.0 µm

Chamfers and radius

Radial section
S
Radius
R1
Radius
R2
Chamfer
C
3.00 0.30 0.50 2.00
4.00 0.30 0.50 2.00
5.00 0.40 0.60 2.50
6.00 0.50 0.70 3.00
7.50 0.80 1.00 4.00
10.00 0.80 1.00 5.00
115 dimensions found
385.1003008
Standard request
3,17 8,75 3,96 5,50
385.1004011
Standard request
4,76 11,11 3,96 5,50
385.1006012
Standard request
6,00 12,00 4,00 5,50
385.2006012
Standard request
6,35 12,70 3,96 5,50
385.1007014
Standard request
7,93 14,28 3,96 5,50
385.008014E
Standard request
8,00 14,00 4,00 4,80
385.08014F6
Standard request
8,00 14,00 4,00 5,50
385.1008014
Standard request
8,00 14,00 4,00 5,50
385.1008016
Standard request
8,00 16,00 5,50 7,00
385.1009016
Standard request
9,52 16,50 3,96 5,50
385.0100184
Standard request
10,00 18,00 4,00 5,00
385.1010018
Standard request
10,00 18,00 5,50 7,00
385.1011019
Standard request
11,11 19,05 3,96 5,50
385.1012020
Standard request
12,00 20,00 5,50 7,00
385.1012021
Standard request
12,70 21,00 5,10 7,00
385.14018K6
Standard request
14,00 18,00 2,90 3,00
385.1014022
Standard request
14,00 22,00 5,50 7,00
385.1014020
Standard request
14,28 20,63 4,76 6,00
385.1015022
Standard request
15,87 22,22 4,76 6,00
385.15224C0
Standard request
15,87 22,22 4,76 6,00
385.1016024
Standard request
16,00 24,00 5,50 7,00
385.1017023
Standard request
17,46 23,81 4,60 6,00
385.1018025
Standard request
18,00 25,00 4,50 6,00
385.1825SP9
Standard request
18,00 25,00 4,50 6,00
385.1018026
Standard request
18,00 26,00 5,50 6,00
385.0180305
Standard request
18,00 30,00 5,50 6,00
385.1019025
Standard request
19,08 25,40 4,76 6,00
385.1020028
Standard request
20,00 28,00 5,50 7,00
385.2020028
Standard request
20,63 28,58 4,76 6,00
385.1022030
Standard request
22,00 30,00 5,50 6,00
385.1022-22
Standard request
22,22 31,75 4,76 6,00
385.1023036
Standard request
23,81 36,51 6,35 8,00
385.1025035
Standard request
25,00 35,00 7,00 8,50
385.1025038
Standard request
25,40 38,10 6,35 8,00
385.1026036
Standard request
26,99 36,51 6,35 8,00
385.1028036
Standard request
28,00 36,00 5,50 7,00
385.1028038
Standard request
28,00 38,00 7,00 7,50
385.1028041
Standard request
28,58 41,28 7,93 9,50
385.1030038
Standard request
30,16 38,10 6,35 8,00
385.1031044
Standard request
31,75 44,45 6,35 8,00
385.32040CA
Standard request
32,00 40,00 5,00 6,00
385.1032042
Standard request
32,00 42,00 7,00 8,50
385.1032045
Standard request
32,00 45,00 10,00 11,00
385.0330416
Standard request
33,00 40,87 4,50 6,00
385.1033040
Standard request
33,34 40,63 4,60 6,00
385.1034050
Standard request
34,93 50,80 7,93 9,50
385.1036046
Standard request
36,00 46,00 7,00 7,50
385.1036050
Standard request
36,51 50,80 7,93 9,50
385.1038050
Standard request
38,10 50,80 9,52 11,00
385.1039055
Standard request
39,69 55,96 9,52 11,00
385.1040046
Standard request
40,00 46,00 3,60 4,40
385.1040050
Standard request
40,00 50,00 7,00 8,50
385.041050G
Standard request
41,28 50,80 5,55 7,00
385.1041050
Standard request
41,28 50,80 5,55 7,00
385.1042050
Standard request
42,00 50,00 5,50 7,00
385.1042053
Standard request
42,86 53,98 9,52 11,00
385.1044057
Standard request
44,45 57,15 7,93 9,50
385.1045055
Standard request
45,00 55,00 7,00 7,50
385.1046060
Standard request
46,04 60,33 9,52 11,00
385.1047063
Standard request
47,63 63,50 9,52 11,00
385.1049066
Standard request
49,21 66,68 9,52 11,00
385.1050060
Standard request
50,00 60,00 7,00 7,50
385.1050073
Standard request
50,80 73,03 11,11 12,50
385.1053069
Standard request
53,98 69,85 9,52 11,00
385.1056068
Standard request
56,00 68,00 7,00 7,50
385.2056068
Standard request
56,00 68,00 8,50 10,00
385.1057069
Standard request
57,15 69,85 7,93 9,50
385.1060072
Standard request
60,00 72,00 8,50 10,00
385.1060076
Standard request
60,33 76,20 7,93 9,50
385.1063075
Standard request
63,00 75,00 8,50 10,00
385.1063076
Standard request
63,50 76,20 7,93 9,50
385.1065077
Standard request
65,00 77,00 8,50 10,00
385.1066079
Standard request
66,68 79,38 9,52 11,00
385.1069090
Standard request
69,85 90,90 9,52 11,00
385.1070082
Standard request
70,00 82,00 8,50 9,50
385.1073082
Standard request
73,03 82,55 9,52 11,00
385.1076088
Standard request
76,20 88,90 9,52 11,00
385.1079098
Standard request
79,38 98,43 9,52 11,00
385.1080092
Standard request
80,00 92,00 8,50 10,00
385.1082095
Standard request
82,55 95,25 7,93 9,50
385.1085098
Standard request
85,73 98,43 9,52 11,00
385.1088101
Standard request
88,90 101,60 9,52 11,00
385.1090102
Standard request
90,00 102,00 8,50 9,50
385.1092106
Standard request
92,08 106,40 7,93 9,50
385.1095111
Standard request
95,25 111,10 9,52 11,00
385.1098107
Standard request
98,43 107,95 9,52 11,00
385.1100112
Standard request
100,00 112,00 8,50 10,00
385.1100115
Standard request
100,00 115,00 10,00 11,50
385.1101111
Standard request
101,60 111,10 5,75 7,00
385.1061177
Standard request
106,30 117,20 7,20 7,60
385.1107127
Standard request
107,95 127,00 9,52 11,00
385.1110130
Standard request
110,00 130,00 14,00 15,50
385.1114146
Standard request
114,30 146,05 12,70 14,00
385.1120136
Standard request
120,65 136,50 7,14 8,50
385.1125145
Standard request
125,00 145,00 14,00 15,50
385.1127146
Standard request
127,00 146,05 12,70 14,00
385.1133152
Standard request
133,35 152,40 12,70 14,00
385.1139157
Standard request
139,70 157,52 7,14 8,50
385.1140160
Standard request
140,00 160,00 14,00 15,50
385.1146165
Standard request
146,05 165,10 12,70 14,00
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