BECA 500 - 502 - 504
![BECA 500 - 502 - 504](/media/beca_500_profil__069305600_1603_25112013.gif)
![beca_500_502_504_3d_v1](/media/thumbnails/beca_500_502_504_3d_v1__007288300_1601_05062015.jpg)
![beca_500_502_504_3d_v2](/media/thumbnails/beca_500_502_504_3d_v2__000895400_1601_05062015.jpg)
Description
The BECA 500 - 502 - 504 profiles are double acting composite piston seals composed of a filled PTFE friction ring and pre-tightened rubber O'Ring. They can be assembled in grooves according to standard ISO 7425/1. Option of connecting the seal to 1 or 2 back-up rings.
Advantages
Optimal sealing in static and dynamic applications
Low friction coefficient; no stick-slip effect
Excellent abrasion and extrusion resistance
Wide temperature range and excellent chemical resistance, depending on the material selected for the O'Ring
Technical data
Temperature | -30°C/+200°C |
---|---|
Pressure | 50 MPa |
Speed | 5 m/s |
Medias | Mineral hydraulic oils |
Applications
Mobile machinery
Injection presses
Machine tools
Presses
Standard cylinders
Materials
Friction ring
Bronze-filled PTFE
Carbon-filled PTFE
GL Blue PTFE
O'Ring
NBR 70 Shore A
FKM 70 Shore A
Dimensions
![Logement Gorge Joint de piston - Housing Groove Gland Piston seal BECA 500 - 502 - 504](/media/copy1_schema_implantation_joint_de_piston_beca_500_502_504__084358200_1619_28082014.gif)
Installation dimensions
Installation dimensions
Bore diameter ØD1 H9 |
Groove diameter | Groove width | Radial section | O'Ring cross-section |
||
---|---|---|---|---|---|---|
BECA 500 Standard series |
BECA 502 Light series |
BECA 504 Heavy-duty series |
Ød1 h9 | L1 0/+0.20 | S | Ød2 |
8.0 - 14.9 | 15.0 - 39.9 | --- | D1 - 4.90 | 2.20 | 2.45 | 1.78 |
15.0 - 39.9 | 40.0 - 79.9 | --- | D1 - 7.50 | 3.20 | 3.75 | 2.62 |
40.0 - 79.9 | 80.0 - 132.9 | 15.0 - 39.9 | D1 - 11.00 | 4.20 | 5.50 | 3.53 |
80.0 - 132.9 | 133.0 - 329.9 | 40.0 - 79.9 | D1 - 15.50 | 6.30 | 7.75 | 5.33 |
133.0 - 329.9 | 330.0 - 669.9 | 80.0 - 132.9 | D1 - 21.00 | 8.10 | 10.50 | 6.99 |
330.0 - 669.9 | 670.0 - 999.9 | 133.0 - 329.9 | D1 - 24.50 | 8.10 | 12.25 | 6.99 |
670.0 - 999.9 | 1000.0 - ** | 330.0 - 669.9 | D1 - 28.00 | 9.50 | 14.00 | 8.40 |
1000.0 - ** | --- | 1000.0 - ** | D1 - 38.00 | 13.80 | 19.00 | 12.00 |
For special applications > 40 MPa, we recommend using an H8/f8 tolerance (bore/piston) or selecting other more suitable materials. Please contact our experts.
Materials
Friction ring | O'Ring | Contact surface area | ||||||
---|---|---|---|---|---|---|---|---|
Standard code | ISO code | Material | Colour | Characteristics | Code | Type of material | Service temperature | |
DP | P | Virgin PTFE | White | Resistance to chemical products Sealing water Dielectric Non-stick Low friction coefficient Food & Beverage |
K6 | NBR 70 Shore A | -30°C/+100°C | Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
F6 | VMQ 70 Shore A |
-60°C/+200°C | ||||||
DC | C | PTFE +25% Carbon |
Grey |
Improvement
Good resistance to chemical products Efficient as part of dynamic |
K6 | NBR 70 Shore A | -30°C/+100°C | |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
CG | C | PTFE + 23% Carbon + 2% Graphite |
Black | K6 | NBR 70 Shore A | -30°C/+100°C | ||
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
DV | V | PTFE + 25 % Glass |
Blue | Improvement
corrected with the addition of MOS2 Chemical and dielectric properties preserved Well suited to applications with rotating and simultaneous alternating movements |
K6 | NBR 70 Shore A | -30°C/+100°C | Steel Chrome steel Cast iron |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
VM | M | PTFE + 15 % Glass + 5% MoS2 |
Grey | K6 | NBR 70 Shore A | -30°C/+100°C | ||
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
DX | X | GL Blue PTFE + Glass + Metal oxides |
Turquoise blue | Compression resistant Wear resistant Excellent chemical stability Good thermal conductivity |
K6 | NBR 70 Shore A | -30°C/+100°C | |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
DG | G | PTFE + 15% Graphite |
Black | Improvement
Self-lubricating Thermal and electrical conductivity Low permeability Good friction coefficient Anti-static Efficient as part of dynamic dynamic applications with self-lubrication |
K6 | NBR 70 Shore A | -30°C/+100°C | Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
K1 | K | PTFE + 10% Ekonol |
Light brown | Improvement
Good friction coefficient and low permeability |
K6 | NBR 70 Shore A | -30°C/+100°C | |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
K2 | K | PTFE + 20% Ekonol |
Light brown | K6 | NBR 70 Shore A | -30°C/+100°C | ||
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
C6 | EPDM 70 Shore A | -45°C/+150°C | ||||||
DB | B | PTFE + 60% Bronze |
Dark brown | Improvement
Electrical and thermal conductivity Does not alter metal parts Reduced resistance to certain chemical products Used for dynamic seals with a strong compression and low level of wear |
K6 | NBR 70 Shore A | -30°C/+100°C | Steel Chrome steel Cast iron |
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
B4 | B | PTFE + 40% Bronze |
Dark brown | K6 | NBR 70 Shore A | -30°C/+100°C | ||
G6 | FKM 70 Shore A | -20°C/+200°C | ||||||
HG | HG | PE-UHMW | White or off-white | Excellent wear resistance on contact with water and air | K6 | NBR 70 Shore A | -30°C/+80°C | Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
PU | U | Polyurethane | Blue | Large mechanical resistance Good abrasion and wear resistance High elastic modulus Good flexibility Very good ozone and oxidation resistance |
K6 | NBR 70 Shore A | -30°C/+90°C | |
PUHT | U | High-temperature polyurethane | White or off-white | K6 | NBR 70 Shore A | -30°C/+100°C |
Other grades of materials are available depending on your specificities.
Technical data
Extrusion gaps
Radial section S |
Radial extrusion gap F/2 |
||
---|---|---|---|
10 MPa | 20 MPa | 40 MPa | |
2.45 | 0.30 | 0.20 | 0.15 |
3.75 | 0.40 | 0.25 | 0.15 |
5.50 | 0.40 | 0.25 | 0.20 |
7.75 | 0.50 | 0.30 | 0.20 |
10.50 | 0.60 | 0.35 | 0.25 |
12.25 | 0.60 | 0.35 | 0.25 |
14.00 | 0.70 | 0.50 | 0.30 |
19.00 | 1.00 | 0.70 | 0.60 |
Surface roughness
Roughness | Dynamic surface area | Static surface area | Groove flanks |
---|---|---|---|
Ra | 0.05 - 0.2 µm | ≤ 1.6 µm | ≤ 3.2 µm |
Rz | 0.4 - 1.6 µm | ≤ 6.3 µm | ≤ 10.0 µm |
Rmax | 0.63 - 2.5 µm | ≤ 10.0 µm | ≤ 16.0 µm |
Chamfers and radius
Radial section S |
Radius R1 |
Radius R2 |
Chamfer C |
---|---|---|---|
2.45 | 0.30 | 0.40 | 3.00 |
3.75 | 0.30 | 0.60 | 3.00 |
5.50 | 0.30 | 1.00 | 3.00 |
7.75 | 0.30 | 1.30 | 5.00 |
10.50 | 0.30 | 1.80 | 6.00 |
12.25 | 0.30 | 1.80 | 8.00 |
14.00 | 0.30 | 2.50 | 10.00 |
19.00 | 0.30 | 3.00 | 12.00 |
502.700
|
700,00 | 675,50 | 8,10 |
504.750
|
750,00 | 712,00 | 13,80 |
500.750
|
750,00 | 722,00 | 9,50 |
502.750
|
750,00 | 725,50 | 8,10 |
504.800
|
800,00 | 762,00 | 13,80 |
500.800
|
800,00 | 772,00 | 9,50 |
502.800
|
800,00 | 775,50 | 8,10 |
504.850
|
850,00 | 812,00 | 13,80 |
500.850
|
850,00 | 822,00 | 9,50 |
502.850
|
850,00 | 825,50 | 8,10 |
504.900
|
900,00 | 862,00 | 13,80 |
500.900
|
900,00 | 872,00 | 9,50 |
502.900
|
900,00 | 875,50 | 8,10 |
504.950
|
950,00 | 912,00 | 13,80 |
500.950
|
950,00 | 922,00 | 9,50 |
502.950
|
950,00 | 925,50 | 8,10 |