BECA 322
Description
The BECA 322 profile is a U-ring type single acting rod seal with symmetrical lips, composed of a profiled polyurethane seal, a NBR O'Ring to preserve its elastic memory and a triangular POM back-up ring on the back. It can be assembled in a groove according to standard ISO 5597.
Advantages
Very good sealing at low pressures
Elastic memory preserved using the O'Ring
Excellent abrasion resistance
Very good extrusion resistance
Technical data
| Temperature | -30°C/+100°C |
|---|---|
| Pressure | 45 MPa |
| Speed | 0.5 m/s |
| Medias | Mineral hydraulic oils |
Applications
Agriculture
Mobile machinery
Lifting systems
Injection presses
Hydraulic cylinders
Materials
Profiled seal
PU 93 Shore A - Blue
PU 96 Shore A - Blue
High temp. PU 96 Shore A - Beige
O'Ring
NBR 70 Shore A
Back-up ring
Polyoxymethylene (POM)
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 |
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 |
Polyoxymethylene - POM
Polyoxymethylene (POM or polyacetal) belongs to the thermoplastics, which have a number of advantages - strong mechanical resistance, good creep strength, high resistance to shocks, particularly at low temperatures, good wear resistance, good sliding coefficient, excellent machinability and good dielectric properties. The low water absorption coefficient, unlike polyamide (PA), also gives this material an excellent dimensional stability.
| Chemical resistance |
Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel) |
|---|---|
| Compatibility issue | Acids |
| Temperature range | -50°C/+115°C |
Technical data
Extrusion gaps
| Pressure MPa |
Radial extrusion gap F/2 |
|---|---|
| 20 MPa | 0.30 |
| 25 MPa | 0.25 |
| 35 MPa | 0.15 |
| 40 MPa | 0.10 |
| 45 MPa | 0.07 |
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 | 0.20 | 0.40 | 2.00 |
| 4.00 | 0.40 | 0.60 | 2.50 |
| 5.00 | 0.80 | 1.00 | 2.50 |
| 7.50 | 0.80 | 1.00 | 4.00 |
| 10.00 | 0.80 | 1.00 | 5.00 |
|
322.1401650
|
140,00 | 165,00 | 19,00 | 20,00 |
|
322.1451600
|
145,00 | 160,00 | 9,60 | 10,60 |
|
322.1581662
|
158,00 | 166,00 | 11,10 | 12,00 |
|
322.1601850
|
160,00 | 185,00 | 19,00 | 20,00 |
|
322.1601905
|
160,00 | 190,00 | 24,00 | 25,00 |
|
322.1802050
|
180,00 | 205,00 | 19,00 | 20,00 |
|
322.1802105
|
180,00 | 210,00 | 24,00 | 25,00 |
|
322.1852000
|
185,00 | 200,00 | 9,60 | 10,60 |
|
322.1982062
|
198,00 | 206,00 | 11,10 | 12,00 |
|
322.1982082
|
198,00 | 208,00 | 11,20 | 12,00 |
|
322.2002250
|
200,00 | 225,00 | 19,00 | 20,00 |
|
322.2002305
|
200,00 | 230,00 | 24,00 | 25,00 |
|
322.2182304
|
218,00 | 230,00 | 13,00 | 14,00 |
|
322.2202505
|
220,00 | 250,00 | 24,00 | 25,00 |
|
322.2502805
|
250,00 | 280,00 | 24,00 | 25,00 |
|
322.2803105
|
280,00 | 310,00 | 24,00 | 25,00 |
|
322.3203602
|
320,00 | 360,00 | 31,00 | 32,00 |
|
322.3604002
|
360,00 | 400,00 | 31,00 | 32,00 |
