BECA 124B
Description
The BECA 014 profile is a polyurethane static seal. It provides an alternative solution to combining an O'Ring (possible twisting during fitting) with a back-up ring (positioning is not always optimal).
Advantages
Excellent resistance to twisting
Easy assembly
Excellent extrusion resistance
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
Preferential extrusion gaps
The mechanical tolerances below are recommended for optimal operation:
- Bore diameter: H8
- Groove diameter: g6
A radial extrusion gap of F/2 at 0.20 mm is acceptable, depending on the shape of the seal and the type of material that makes up the seal.
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 and angle |
|---|---|
| ≤ 3.00 mm | 3 x 15° |
| > 3.00 mm | 5 x 15° |
Only on request