BECA 385
Description
The BECA 385 profile is a U-ring type single acting rod seal with asymmetrical rubber lips for low-pressure applications.
Advantages
Reliable sealing for "dry air" pneumatic applications when mineral oils or greases may be present
Excellent wear resistance
Very good sealing
Technical data
| Temperature | -30°C/+150°C |
|---|---|
| Pressure | 1.6 MPa |
| Speed | 1 m/s |
| Medias | Lubricated air |
Applications
Shock absorbers
Distributor
Standard cylinders
Materials
NBR 80 Shore A
FKM 80 Shore A
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 |
Technical data
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 |
|
385.1152171
|
152,40 | 171,45 | 9,52 | 11,00 |
|
385.1158177
|
158,80 | 177,80 | 12,70 | 14,00 |
|
385.1160180
|
160,00 | 180,00 | 14,00 | 17,00 |
|
385.1165184
|
165,10 | 184,15 | 12,70 | 14,00 |
|
385.1171190
|
171,45 | 190,50 | 12,70 | 14,00 |
|
385.1177190
|
177,80 | 190,50 | 7,14 | 8,50 |
|
385.1180200
|
180,00 | 200,00 | 14,00 | 17,00 |
|
385.1184203
|
184,15 | 203,20 | 9,52 | 11,00 |
|
385.1190209
|
190,55 | 209,55 | 12,70 | 14,00 |
|
385.1196215
|
196,90 | 215,90 | 12,70 | 14,00 |
|
385.1203222
|
203,20 | 222,30 | 12,70 | 14,00 |
|
385.1209228
|
209,55 | 228,60 | 12,70 | 14,00 |
|
385.1215235
|
215,90 | 235,00 | 12,70 | 14,00 |
|
385.1222241
|
222,30 | 241,30 | 9,52 | 11,00 |
|
385.1228247
|
228,60 | 247,70 | 12,70 | 14,00 |
