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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

385.1003008, 385.1004011, 385.1006012, 385.2006012, 385.1007014, 385.008014E, 385.08014F6, 385.1008014, 385.1008016, 385.1009016, 385.0100184, 385.1010018, 385.1011019, 385.1012020, 385.1012021, 385.14018K6, 385.1014022, 385.1014020, 385.1015022, 385.15224C0, 385.1016024, 385.1017023, 385.1018025, 385.1825SP9, 385.1018026, 385.0180305, 385.1019025, 385.1020028, 385.2020028, 385.1022030, 385.1022-22, 385.1023036, 385.1025035, 385.1025038, 385.1026036, 385.1028036, 385.1028038, 385.1028041, 385.1030038, 385.1031044, 385.32040CA, 385.1032042, 385.1032045, 385.0330416, 385.1033040, 385.1034050, 385.1036046, 385.1036050, 385.1038050, 385.1039055, 385.1040046, 385.1040050, 385.041050G, 385.1041050, 385.1042050, 385.1042053, 385.1044057, 385.1045055, 385.1046060, 385.1047063, 385.1049066, 385.1050060, 385.1050073, 385.1053069, 385.1056068, 385.2056068, 385.1057069, 385.1060072, 385.1060076, 385.1063075, 385.1063076, 385.1065077, 385.1066079, 385.1069090, 385.1070082, 385.1073082, 385.1076088, 385.1079098, 385.1080092, 385.1082095, 385.1085098, 385.1088101, 385.1090102, 385.1092106, 385.1095111, 385.1098107, 385.1100112, 385.1100115, 385.1101111, 385.1061177, 385.1107127, 385.1110130, 385.1114146, 385.1120136, 385.1125145, 385.1127146, 385.1133152, 385.1139157, 385.1140160, 385.1146165, 385.1152171, 385.1158177, 385.1160180, 385.1165184, 385.1171190, 385.1177190, 385.1180200, 385.1184203, 385.1190209, 385.1196215, 385.1203222, 385.1209228, 385.1215235, 385.1222241, 385.1228247
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
385.1152171
Standard request
152,40 171,45 9,52 11,00
385.1158177
Standard request
158,80 177,80 12,70 14,00
385.1160180
Standard request
160,00 180,00 14,00 17,00
385.1165184
Standard request
165,10 184,15 12,70 14,00
385.1171190
Standard request
171,45 190,50 12,70 14,00
385.1177190
Standard request
177,80 190,50 7,14 8,50
385.1180200
Standard request
180,00 200,00 14,00 17,00
385.1184203
Standard request
184,15 203,20 9,52 11,00
385.1190209
Standard request
190,55 209,55 12,70 14,00
385.1196215
Standard request
196,90 215,90 12,70 14,00
385.1203222
Standard request
203,20 222,30 12,70 14,00
385.1209228
Standard request
209,55 228,60 12,70 14,00
385.1215235
Standard request
215,90 235,00 12,70 14,00
385.1222241
Standard request
222,30 241,30 9,52 11,00
385.1228247
Standard request
228,60 247,70 12,70 14,00
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