BECA 579S

BECA 579S
BECA 579S
BECA 579S

Description

The BECA 579S profile is a high-performing, double acting compact piston seal composed of a profiled rubber ring, two polyurethane back-up rings and two L-shaped POM wear/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 cost
Economic wear and sealing solution

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

Wear/Back-up rings

Polyoxymethylene (POM)

Dimensions
Materials
Technical data

Dimensions

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

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 - 579S

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
90 dimensions found
579.0020BK8
Standard request
20,00 11,00 17,00 19,00 13,50 2,10
579.0022BK8
Standard request
22,00 13,00 19,00 21,00 13,50 2,10
579.0025BK8
Standard request
25,00 15,00 21,00 23,00 12,00 4,00
579.2025BK8
Standard request
25,00 15,00 22,00 24,00 12,50 4,00
579.1025BK8
Standard request
25,00 15,00 21,45 23,50 16,40 6,35
579.3025BK8
Standard request
25,00 16,00 22,00 24,00 13,50 2,10
579.0028BK8
Standard request
28,00 19,00 25,00 27,00 13,50 2,10
579.0030BK8
Standard request
30,00 17,00 26,50 28,50 15,40 6,35
579.1030BK8
Standard request
30,00 21,00 27,00 29,00 13,50 2,10
579.0032BK8
Standard request
32,00 22,00 28,00 31,00 15,50 2,60
579.1032BK8
Standard request
32,00 22,00 28,50 30,50 16,40 6,35
579.0035BK8
Standard request
35,00 25,00 31,00 34,00 15,50 2,60
579.1035BK8
Standard request
35,00 25,00 31,40 33,50 16,40 6,35
579.0040BK8
Standard request
40,00 26,00 36,00 39,00 15,50 2,60
579.2040BK8
Standard request
40,00 30,00 36,00 38,00 12,50 4,00
579.3040BK8
Standard request
40,00 30,00 37,00 39,00 12,50 4,00
579.1040BK8
Standard request
40,00 30,00 35,40 38,50 16,40 6,35
579.0042BK8
Standard request
42,00 28,00 38,00 41,00 15,50 2,60
579.0045BK8
Standard request
45,00 29,00 40,40 43,50 18,40 6,35
579.1045BK8
Standard request
45,00 31,00 41,00 44,00 15,50 2,60
579.2045BK8
Standard request
45,00 35,00 40,40 43,50 16,40 6,35
579.0050BK8
Standard request
50,00 34,00 45,40 48,50 18,40 6,35
579.1050BK8
Standard request
50,00 34,00 46,00 49,00 20,50 3,10
579.0055BK8
Standard request
55,00 39,00 50,36 53,50 18,40 6,35
579.1055BK8
Standard request
55,00 39,00 51,00 54,00 20,50 3,10
579.0056BK8
Standard request
56,00 40,00 52,00 55,00 20,50 3,10
579.0060BK8
Standard request
60,00 44,00 55,40 58,50 18,40 6,35
579.1060BK8
Standard request
60,00 44,00 56,00 59,00 20,50 3,10
579.0063BK8
Standard request
63,00 47,00 58,40 61,50 18,40 6,35
579.3063BK8
Standard request
63,00 47,00 58,40 61,50 19,40 6,35
579.4063BK8
Standard request
63,00 47,00 59,00 62,00 20,50 3,10
579.0065BK8
Standard request
65,00 49,00 61,00 64,00 20,50 3,10
579.1065BK8
Standard request
65,00 50,00 60,40 63,50 18,40 6,35
579.0070BK8
Standard request
70,00 50,00 64,20 68,30 22,40 6,35
579.1070BK8
Standard request
70,00 54,00 66,00 69,00 20,50 3,10
579.0075BK8
Standard request
75,00 55,00 69,20 73,30 22,40 6,35
579.1075BK8
Standard request
75,00 59,00 71,00 74,00 20,50 3,10
579.0080BK8
Standard request
80,00 60,00 74,15 78,30 22,40 6,35
579.1080BK8
Standard request
80,00 62,00 76,00 79,00 22,50 3,60
579.0085BK8
Standard request
85,00 65,00 79,15 83,30 22,40 6,35
579.0090BK8
Standard request
90,00 70,00 84,15 88,30 22,40 6,35
579.1090BK8
Standard request
90,00 72,00 86,00 89,00 22,50 3,60
579.0095BK8
Standard request
95,00 75,00 89,15 93,30 22,40 6,35
579.0100BK8
Standard request
100,00 75,00 93,15 98,00 22,40 6,35
579.1100BK8
Standard request
100,00 82,00 96,00 99,00 22,50 3,60
579.0105BK8
Standard request
105,00 80,00 98,10 103,00 22,40 6,35
579.0110BK8
Standard request
110,00 85,00 103,10 108,00 22,40 6,35
579.1110BK8
Standard request
110,00 92,00 106,00 109,00 22,50 3,60
579.0115BK8
Standard request
115,00 90,00 108,10 113,00 22,40 6,35
579.1115BK8
Standard request
115,00 97,00 111,00 114,00 22,50 3,60
579.0120BK8
Standard request
120,00 95,00 113,10 118,10 22,40 6,35
579.0125BK8
Standard request
125,00 100,00 118,10 123,00 25,40 6,35
579.1125BK8
Standard request
125,00 103,00 121,00 124,00 26,50 5,10
579.0130BK8
Standard request
130,00 105,00 122,60 127,50 25,40 9,50
579.1130BK8
Standard request
130,00 105,00 123,10 128,00 25,40 6,35
579.0133BK8
Standard request
133,00 115,00 125,60 130,50 22,40 9,52
579.0135BK8
Standard request
135,00 110,00 127,60 132,50 25,40 9,50
579.1135BK8
Standard request
135,00 110,00 128,10 133,00 25,40 6,35
579.0140BK8
Standard request
140,00 115,00 132,60 137,50 25,40 9,50
579.1140BK8
Standard request
140,00 115,00 133,00 138,00 25,40 6,35
579.2140BK8
Standard request
140,00 118,00 136,00 139,00 26,50 5,10
579.0145BK8
Standard request
145,00 120,00 137,60 142,50 25,40 9,50
579.1145BK8
Standard request
145,00 120,00 138,30 142,95 25,40 6,35
579.2150BK8
Standard request
150,00 125,00 142,60 147,50 25,40 9,50
579.1150BK8
Standard request
150,00 125,00 143,00 148,00 25,40 6,35
579.0150BK8
Standard request
150,00 128,00 146,00 149,00 26,50 5,10
579.0152BK8
Standard request
152,40 127,00 145,00 149,91 31,75 9,50
579.0155BK8
Standard request
155,00 130,00 147,60 152,50 25,40 9,50
579.1155BK8
Standard request
155,00 130,00 148,00 153,00 25,40 6,35
579.0160BK8
Standard request
160,00 130,00 152,60 157,50 25,40 9,50
579.1160BK8
Standard request
160,00 130,00 153,00 157,50 25,40 6,35
579.2160BK8
Standard request
160,00 135,00 152,60 157,50 25,40 9,50
579.3160BK8
Standard request
160,00 138,00 156,00 159,00 26,50 5,10
579.0165BK8
Standard request
165,00 140,00 157,60 162,50 25,40 9,50
579.0170BK8
Standard request
170,00 145,00 161,70 167,10 25,40 12,70
579.1170BK8
Standard request
170,00 148,00 166,00 169,00 26,50 5,10
579.0175BK8
Standard request
175,00 150,00 166,70 172,10 25,40 12,70
579.0180BK8
Standard request
180,00 150,00 172,95 177,87 35,40 6,35
579.1180BK8
Standard request
180,00 155,00 171,70 177,10 25,40 12,70
579.0185BK8
Standard request
185,00 160,00 176,70 182,10 25,40 12,70
579.0190BK8
Standard request
190,00 165,00 181,70 187,00 25,40 12,70
579.0195BK8
Standard request
195,00 170,00 186,70 192,00 25,40 12,70
579.0200BK8
Standard request
200,00 175,00 191,60 197,00 25,40 12,70
579.1200BK8
Standard request
200,00 175,00 196,00 199,00 31,50 6,60
579.0210BK8
Standard request
210,00 185,00 201,60 207,00 25,40 12,70
579.0220BK8
Standard request
220,00 190,00 212,70 217,90 35,40 6,35
579.1220BK8
Standard request
220,00 195,00 211,60 217,00 25,40 12,70
579.0230BK8
Standard request
230,00 205,00 221,60 227,00 25,40 12,70
579.0240BK8
Standard request
240,00 215,00 231,60 237,00 25,40 12,70
579.0250BK8
Standard request
250,00 220,00 242,90 247,85 35,40 6,35