BECA 579

BECA 579
beca_579_3d_v1
beca_579_3d_v2

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
Technical data

Dimensions

Installation drawingLogement Gorge Joint de piston - Housing Groove Gland Piston seal BECA 579

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)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Water

Compatibility issue Acids
Temperature range -50°C/+115°C

Technical data

Housing Groove Gland Piston Seal - BECA - 579

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
91 dimensions found
579.0020AK8
Standard request
20,00 11,00 13,50
579.0022AK8
Standard request
22,00 13,00 13,50
579.0025AK8
Standard request
25,00 15,00 12,00
579.2025AK8
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25,00 15,00 12,50
579.1025AK8
Standard request
25,00 15,00 16,40
579.3025AK8
Standard request
25,00 16,00 13,50
579.0028AK8
Standard request
28,00 19,00 13,50
579.0030AK8
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30,00 17,00 15,40
579.1030AK8
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30,00 21,00 13,50
579.0032AK8
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32,00 22,00 15,50
579.1032AK8
Standard request
32,00 22,00 16,40
579.0035AK8
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35,00 25,00 15,50
579.1035AK8
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35,00 25,00 16,40
579.0040AK8
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40,00 24,00 18,40
579.4040AK8
Standard request
40,00 26,00 15,50
579.2040AK8
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40,00 30,00 12,50
579.3040AK8
Standard request
40,00 30,00 12,50
579.1040AK8
Standard request
40,00 30,00 16,40
579.0042AK8
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42,00 28,00 15,50
579.0045AK8
Standard request
45,00 29,00 18,40
579.1045AK8
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45,00 31,00 15,50
579.2045AK8
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45,00 35,00 16,40
579.0050AK8
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50,00 34,00 18,40
579.1050AK8
Standard request
50,00 34,00 20,50
579.0055AK8
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55,00 39,00 18,40
579.1055AK8
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55,00 39,00 20,50
579.0056AK8
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56,00 40,00 20,50
579.0060AK8
Standard request
60,00 44,00 18,40
579.1060AK8
Standard request
60,00 44,00 20,50
579.0063AK8
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63,00 47,00 18,40
579.1063AK8
Standard request
63,00 47,00 19,40
579.2063AK8
Standard request
63,00 47,00 20,50
579.0065AK8
Standard request
65,00 49,00 20,50
579.1065AK8
Standard request
65,00 50,00 18,40
579.0070AK8
Standard request
70,00 50,00 22,40
579.1070AK8
Standard request
70,00 54,00 20,50
579.0075AK8
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75,00 55,00 22,40
579.1075AK8
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75,00 59,00 20,50
579.0080AK8
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80,00 60,00 22,40
579.1080AK8
Standard request
80,00 62,00 22,50
579.0085AK8
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85,00 65,00 22,40
579.0090AK8
Standard request
90,00 70,00 22,40
579.1090AK8
Standard request
90,00 72,00 22,50
579.0095AK8
Standard request
95,00 75,00 22,40
579.0100AK8
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100,00 75,00 22,40
579.1100AK8
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100,00 82,00 22,50
579.0105AK8
Standard request
105,00 80,00 22,40
579.0110AK8
Standard request
110,00 85,00 22,40
579.1110AK8
Standard request
110,00 92,00 22,50
579.0115AK8
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115,00 90,00 22,40
579.1115AK8
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115,00 97,00 22,50
579.0120AK8
Standard request
120,00 95,00 22,40
579.0125AK8
Standard request
125,00 100,00 25,40
579.1125AK8
Standard request
125,00 103,00 26,50
579.0130AK8
Standard request
130,00 105,00 25,40
579.1130AK8
Standard request
130,00 105,00 25,40
579.0133AK8
Standard request
133,00 115,00 22,40
579.0135AK8
Standard request
135,00 110,00 25,40
579.1135AK8
Standard request
135,00 110,00 25,40
579.0140AK8
Standard request
140,00 115,00 25,40
579.1140AK8
Standard request
140,00 115,00 25,40
579.2140AK8
Standard request
140,00 118,00 26,50
579.0145AK8
Standard request
145,00 120,00 25,40
579.1145AK8
Standard request
145,00 120,00 25,40
579.0150AK8
Standard request
150,00 125,00 25,40
579.1150AK8
Standard request
150,00 128,00 26,50
579.0152AK8
Standard request
152,40 127,00 31,75
579.0155AK8
Standard request
155,00 130,00 25,40
579.1155AK8
Standard request
155,00 130,00 25,40
579.0160AK8
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160,00 130,00 25,40
579.1160AK8
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160,00 130,00 25,40
579.2160AK8
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160,00 135,00 25,40
579.3160AK8
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160,00 138,00 26,50
579.0165AK8
Standard request
165,00 140,00 25,40
579.0170AK8
Standard request
170,00 145,00 25,40
579.1170AK8
Standard request
170,00 148,00 26,50
579.0175AK8
Standard request
175,00 150,00 25,40
579.0180AK8
Standard request
180,00 150,00 35,40
579.1180AK8
Standard request
180,00 155,00 25,40
579.0185AK8
Standard request
185,00 160,00 25,40
579.0190AK8
Standard request
190,00 165,00 25,40
579.0195AK8
Standard request
195,00 170,00 25,40
579.0200AK8
Standard request
200,00 175,00 25,40
579.1200AK8
Standard request
200,00 175,00 31,50
579.0210AK8
Standard request
210,00 185,00 25,40
579.0220AK8
Standard request
220,00 190,00 35,40
579.1220AK8
Standard request
220,00 195,00 25,40
579.0230AK8
Standard request
230,00 205,00 25,40
579.0240AK8
Standard request
240,00 215,00 25,40
579.0250AK8
Standard request
250,00 220,00 35,40
579.1250AK8
Standard request
250,00 225,00 25,40