BECA 042
Description
The BECA 042 profile is a polyurethane static seal for piston sealing.
Advantages
High reliability
Interchangeable for o-ring and o-ring with back-up ring
Easy and secure installation
No need for additional back-up ring
High wear resistant
Technical data
| Temperature | -30°C / +110°C depending on the material selected |
|---|---|
| Pressure | 50 MPa |
| Speed | 0.5 m/s |
| Medias | Mineral hydraulic oils |
Applications
Mobile machinery
Injection presses
Presses
Standard cylinders
Materials
PU 93 Shore A - Blue
PU 96 Shore A - Blue
High temp. PU 96 Shore A - Beige
Dimensions
Materials
PU
Polyurethane is a material that has the elastic properties of rubber. The proportion in its composition (diisocyanate, polyol, chain extender) is determined by its properties. This material is characterised by a strong mechanical resistance, good wear resistance, high elastic modulus, good flexibility and a very good ozone and oxidation resistance.
| Chemical resistance | Pure aliphatic hydrocarbons (propane, butane) Mineral oils and greases Silicone oils and greases Water up to +50°C |
|---|---|
| Compatibility issue | Ketones, esters, ethers, alcohols and glycols Hot water, steam, alkalis, amines and acids |
| Temperature range | -30°C/+90°C -30°C / +110°C with our PUHT (short term peak at 150°C) |
Technical data
Surface roughness
| In static radial applications | Ra µm | Rt µm | Rz µm |
|---|---|---|---|
| Contact surface area | ≤ 1.6 µm | ≤ 10.0 µm | ≤ 6.3 µm |
| Groove diameter surface | ≤ 3.2 µm | ≤ 16.0 µm | ≤ 6.3 µm |
| Groove flanks | ≤ 3.2 µm | ≤ 16.0 µm | ≤ 6.3 µm |
Chamfers and radius
| Radial section S |
Chamfer C |
Radius R1 |
Radius R2 |
|---|---|---|---|
| S ≤ 2,30 | 2,50 | 0,40 | 0,20 |
| 2,30 < S ≤ 3,00 | 3,00 | 0,40 | 0,20 |
| 3,00 < S ≤ 4,00 | 3,50 | 0,40 | 0,20 |
| 4,00 < S ≤ 4,50 | 4,00 | 0,40 | 0,20 |
| 4,50 < S ≤ 5,00 | 4,50 | 0,40 | 0,20 |
| 5,00 < S ≤ 6,00 | 5,00 | 0,40 | 0,20 |
| 6,00 < S ≤ 8,00 | 6,00 | 0,40 | 0,20 |
Only on request