BECA 302/AE
Description
The BECA 302/AE profile is a single acting compact rod seal composed of a profiled FKM seal and a bronze-filled PTFE back-up ring on the back. It can be assembled in a groove according to standard ISO 5597.
Advantages
Optimised sealing effect
Good chemical compatibility and wide temperature range, depending on the material chosen
Excellent wear resistance
Excellent extrusion resistance
Technical data
| Temperature | -20°C/+200°C |
|---|---|
| Pressure | 35 MPa |
| Speed | 0.5 m/s |
| Medias | Mineral hydraulic oils |
Applications
Mobile machinery
Material handling - Lifting
Presses
Hydraulic cylinders
Materials
Profiled seal
FKM 80 Shore A
Back-up ring
Bronze-filled PTFE
Dimensions
Materials
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 |
Bronze-filled PTFE
PTFE is a thermoplastic polymer made of tetrafluoroethylene with exceptional properties - very low friction coefficient (adhesive friction and sliding friction are almost equal), physiologically safe for temperatures up to +200°C, excellent electrical insulation properties, and excellent chemical compatibility with the majority of fluids. On the other hand, as this material is plastic and not elastic, so it cannot easily replace rubber bases.
Between 40% and 60% of bronze is added to the PTFE as a filler. This machined material has excellent wear resistance, low creep deformation and good thermal conductivity.
Technical data
Extrusion gaps
| Pressure MPa |
Radial extrusion gap F/2 |
|---|---|
| 15 MPa | 0.20 |
| 25 MPa | 0.10 |
| 35 MPa | 0.10 |
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 |
|---|---|---|---|
| 4.00 | 0.20 | 0.40 | 2.00 |
| 5.00 | 0.40 | 0.70 | 2.50 |
| 6.00 | 0.70 | 1.10 | 3.00 |
| 7.50 | 0.70 | 1.10 | 4.00 |
| 10.00 | 1.00 | 1.10 | 5.00 |
|
302.016AG6E
|
16,00 | 26,00 | 8,00 | 9,00 |
|
302.018025E
|
18,00 | 25,00 | 5,60 | 6,30 |
|
302.018AG6E
|
18,00 | 26,00 | 5,70 | 6,30 |
|
302.022029E
|
22,00 | 29,00 | 5,00 | 5,60 |
|
302.022BG6E
|
22,00 | 30,00 | 5,70 | 6,30 |
|
302.022AG6E
|
22,00 | 32,00 | 8,00 | 9,00 |
|
302.025BG6E
|
25,00 | 33,00 | 6,40 | 7,00 |
|
302.028BG6E
|
28,00 | 36,00 | 5,70 | 6,30 |
|
302.028CG6E
|
28,00 | 38,00 | 7,20 | 8,00 |
|
302.028AG6E
|
28,00 | 40,00 | 8,00 | 9,00 |
|
302.036BG6E
|
36,00 | 46,00 | 7,20 | 8,00 |
|
302.036AG6E
|
36,00 | 48,00 | 8,00 | 9,00 |
|
302.040050E
|
40,00 | 50,00 | 10,00 | 11,00 |
|
302.045053E
|
45,00 | 53,00 | 5,70 | 6,30 |
|
302.045055E
|
45,00 | 55,00 | 7,20 | 8,00 |
|
302.045BG6E
|
45,00 | 55,00 | 7,20 | 8,00 |
|
302.045AG6E
|
45,00 | 60,00 | 12,50 | 13,50 |
|
302.350060E
|
50,00 | 60,00 | 7,20 | 8,00 |
|
302.356066E
|
56,00 | 66,00 | 6,80 | 7,50 |
|
302.056AG6E
|
56,00 | 71,00 | 12,50 | 13,50 |
|
302.070AG6E
|
70,00 | 85,00 | 12,50 | 13,50 |
|
302.390105E
|
90,00 | 105,00 | 11,50 | 12,50 |