BECA 579
Description
The BECA 579 profile is a high-performing, double acting compact piston seal composed of a profiled rubber ring, two polyurethane back-up rings and two POM back-up rings.
Advantages
Good sealing effect
Excellent extrusion resistance
Excellent wear resistance
Reliable sealing for significant and sudden pressure variations
Assembly in closed groove, reduced machined costs
Technical data
| Temperature | -30°C/+100°C |
|---|---|
| Pressure | 50 MPa |
| Speed | 0.5 m/s |
| Medias | Mineral hydraulic oils |
Applications
Agriculture
Mobile machinery
Hydraulic cylinders
Materials
Profiled seal
NBR 80 Shore A
Back-up rings
Polyurethane 97 Shore A
Back-up rings
Polyoxymethylene (POM)
Dimensions
Materials
NBR 80 Shore A
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 |
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) |
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
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 | 0.40 | 0.40 | 2.50 |
| 5.00 | 0.40 | 0.40 | 3.00 |
| 6.00 | 0.40 | 0.40 | 3.00 |
| 7.50 | 0.40 | 0.40 | 4.00 |
| 8.50 | 0.40 | 0.40 | 5.00 |
| 10.00 | 0.80 | 0.80 | 6.00 |
| 15.00 | 0.80 | 0.80 | 8.00 |
|
579.0020AK8
|
20,00 | 11,00 | 13,50 |
|
579.0022AK8
|
22,00 | 13,00 | 13,50 |
|
579.0025AK8
|
25,00 | 15,00 | 12,00 |
|
579.2025AK8
|
25,00 | 15,00 | 12,50 |
|
579.1025AK8
|
25,00 | 15,00 | 16,40 |
|
579.3025AK8
|
25,00 | 16,00 | 13,50 |
|
579.0028AK8
|
28,00 | 19,00 | 13,50 |
|
579.0030AK8
|
30,00 | 17,00 | 15,40 |
|
579.1030AK8
|
30,00 | 21,00 | 13,50 |
|
579.0032AK8
|
32,00 | 22,00 | 15,50 |
|
579.1032AK8
|
32,00 | 22,00 | 16,40 |
|
579.0035AK8
|
35,00 | 25,00 | 15,50 |
|
579.1035AK8
|
35,00 | 25,00 | 16,40 |
|
579.0040AK8
|
40,00 | 24,00 | 18,40 |
|
579.4040AK8
|
40,00 | 26,00 | 15,50 |
|
579.2040AK8
|
40,00 | 30,00 | 12,50 |
|
579.3040AK8
|
40,00 | 30,00 | 12,50 |
|
579.1040AK8
|
40,00 | 30,00 | 16,40 |
|
579.0042AK8
|
42,00 | 28,00 | 15,50 |
|
579.0045AK8
|
45,00 | 29,00 | 18,40 |
|
579.1045AK8
|
45,00 | 31,00 | 15,50 |
|
579.2045AK8
|
45,00 | 35,00 | 16,40 |
|
579.0050AK8
|
50,00 | 34,00 | 18,40 |
|
579.1050AK8
|
50,00 | 34,00 | 20,50 |
|
579.0055AK8
|
55,00 | 39,00 | 18,40 |
|
579.1055AK8
|
55,00 | 39,00 | 20,50 |
|
579.0056AK8
|
56,00 | 40,00 | 20,50 |
|
579.0060AK8
|
60,00 | 44,00 | 18,40 |
|
579.1060AK8
|
60,00 | 44,00 | 20,50 |
|
579.0063AK8
|
63,00 | 47,00 | 18,40 |
|
579.1063AK8
|
63,00 | 47,00 | 19,40 |
|
579.2063AK8
|
63,00 | 47,00 | 20,50 |
|
579.0065AK8
|
65,00 | 49,00 | 20,50 |
|
579.1065AK8
|
65,00 | 50,00 | 18,40 |
|
579.0070AK8
|
70,00 | 50,00 | 22,40 |
|
579.1070AK8
|
70,00 | 54,00 | 20,50 |
|
579.0075AK8
|
75,00 | 55,00 | 22,40 |
|
579.1075AK8
|
75,00 | 59,00 | 20,50 |
|
579.0080AK8
|
80,00 | 60,00 | 22,40 |
|
579.1080AK8
|
80,00 | 62,00 | 22,50 |
|
579.0085AK8
|
85,00 | 65,00 | 22,40 |
|
579.0090AK8
|
90,00 | 70,00 | 22,40 |
|
579.1090AK8
|
90,00 | 72,00 | 22,50 |
|
579.0095AK8
|
95,00 | 75,00 | 22,40 |
|
579.0100AK8
|
100,00 | 75,00 | 22,40 |
|
579.1100AK8
|
100,00 | 82,00 | 22,50 |
|
579.0105AK8
|
105,00 | 80,00 | 22,40 |
|
579.0110AK8
|
110,00 | 85,00 | 22,40 |
|
579.1110AK8
|
110,00 | 92,00 | 22,50 |
|
579.0115AK8
|
115,00 | 90,00 | 22,40 |
|
579.1115AK8
|
115,00 | 97,00 | 22,50 |
|
579.0120AK8
|
120,00 | 95,00 | 22,40 |
|
579.0125AK8
|
125,00 | 100,00 | 25,40 |
|
579.1125AK8
|
125,00 | 103,00 | 26,50 |
|
579.0130AK8
|
130,00 | 105,00 | 25,40 |
|
579.1130AK8
|
130,00 | 105,00 | 25,40 |
|
579.0133AK8
|
133,00 | 115,00 | 22,40 |
|
579.0135AK8
|
135,00 | 110,00 | 25,40 |
|
579.1135AK8
|
135,00 | 110,00 | 25,40 |
|
579.0140AK8
|
140,00 | 115,00 | 25,40 |
|
579.1140AK8
|
140,00 | 115,00 | 25,40 |
|
579.2140AK8
|
140,00 | 118,00 | 26,50 |
|
579.0145AK8
|
145,00 | 120,00 | 25,40 |
|
579.1145AK8
|
145,00 | 120,00 | 25,40 |
|
579.0150AK8
|
150,00 | 125,00 | 25,40 |
|
579.1150AK8
|
150,00 | 128,00 | 26,50 |
|
579.0152AK8
|
152,40 | 127,00 | 31,75 |
|
579.0155AK8
|
155,00 | 130,00 | 25,40 |
|
579.1155AK8
|
155,00 | 130,00 | 25,40 |
|
579.0160AK8
|
160,00 | 130,00 | 25,40 |
|
579.1160AK8
|
160,00 | 130,00 | 25,40 |
|
579.2160AK8
|
160,00 | 135,00 | 25,40 |
|
579.3160AK8
|
160,00 | 138,00 | 26,50 |
|
579.0165AK8
|
165,00 | 140,00 | 25,40 |
|
579.0170AK8
|
170,00 | 145,00 | 25,40 |
|
579.1170AK8
|
170,00 | 148,00 | 26,50 |
|
579.0175AK8
|
175,00 | 150,00 | 25,40 |
|
579.0180AK8
|
180,00 | 150,00 | 35,40 |
|
579.1180AK8
|
180,00 | 155,00 | 25,40 |
|
579.0185AK8
|
185,00 | 160,00 | 25,40 |
|
579.0190AK8
|
190,00 | 165,00 | 25,40 |
|
579.0195AK8
|
195,00 | 170,00 | 25,40 |
|
579.0200AK8
|
200,00 | 175,00 | 25,40 |
|
579.1200AK8
|
200,00 | 175,00 | 31,50 |
|
579.0210AK8
|
210,00 | 185,00 | 25,40 |
|
579.0220AK8
|
220,00 | 190,00 | 35,40 |
|
579.1220AK8
|
220,00 | 195,00 | 25,40 |
|
579.0230AK8
|
230,00 | 205,00 | 25,40 |
|
579.0240AK8
|
240,00 | 215,00 | 25,40 |
|
579.0250AK8
|
250,00 | 220,00 | 35,40 |
|
579.1250AK8
|
250,00 | 225,00 | 25,40 |