BECA 760 - 769
Description
The BECA 760 is a symmetrical dynamic and static facial effect U-seal, made from PTFE (different filling options) with lips that are pre-stressed by a V-Shaped spring.
Derived from the BECA 760 profile, the BECA 769 profile is specially designed for food industry applications. The V-Shaped spring is replaced by a VMQ O'Ring.
Advantages
Wide temperature range and excellent chemical resistance
Low friction coefficient; no stick-slip effect
Excellent abrasion resistance
Good dimensional stability
Non-toxic material
Technical data
| Temperature | -200°C/+260°C |
|---|---|
| Pressure | 30 MPa |
| Speed | 15 m/s |
| Medias | Mineral hydraulic oils |
Applications
Food & Beverage
Medical
Pharmaceutical
Static hydraulics
Materials
Profiled seal
Bronze-filled PTFE
Carbon-filled PTFE
V-Shaped spring
Stainless steel
Dimensions
Installation dimensions
Installation dimensions - Standard series
| Series | Groove inside diameter Ød1 h10 |
Groove width L4 0/+0.15 |
Groove depth | ||
|---|---|---|---|---|---|
| Standard series | Extended series | h | Tol. | ||
| 760.0* | 7.0 - 14.9 | 7.0 - 200.0 | 2.40 | 1.45 | +0.03 |
| 760.1* | 15.0 - 24.9 | 15.0 - 200.0 | 3.60 | 2.25 | +0.05 |
| 760.2 | 25.0 - 39.9 | 25.0 - 400.0 | 4.80 | 3.10 | +0.08 |
| 760.3 | 40.0 - 79.9 | 40.0 - 600.0 | 7.10 | 4.70 | +0.10 |
| 760.4 | 80.0 - 599.9 | 80.0 - 600.0 | 9.50 | 6.10 | +0.15 |
*Only BECA 760.0 and 760.1 profiles are fitted with an O'Ring instead of a V-Shaped spring.
Installation dimensions - Additional range
| Series | Groove inside diameter Ød1 h10 |
Groove width L4 0/+0.15 |
Groove depth | |
|---|---|---|---|---|
| h | Tol. | |||
| 760.235 | 25.0 - 200.0 | 5.00 | 3.50 | +0.08 |
| 760.240 | 25.0 - 200.0 | 5.00 | 4.00 | +0.08 |
| 760.245 | 25.0 - 200.0 | 5.50 | 4.50 | +0.08 |
| 760.350 | 40.0 - 200.0 | 5.50 | 5.00 | +0.10 |
| 760.355 | 40.0 - 400.0 | 7.50 | 5.50 | +0.10 |
| 760.460 | 80.0 - 400.0 | 8.00 | 6.00 | +0.15 |
| 760.465 | 80.0 - 400.0 | 8.50 | 6.50 | +0.15 |
| 760.470 | 80.0 - 400.0 | 8.50 | 7.00 | +0.15 |
| 760.475 | 80.0 - 400.0 | 9.00 | 7.50 | +0.15 |
| 760.480 | 80.0 - 600.0 | 11.00 | 8.00 | +0.20 |
| 760.485 | 80.0 - 600.0 | 11.00 | 8.50 | +0.20 |
| 760.490 | 80.0 - 600.0 | 11.00 | 9.00 | +0.20 |
| 760.495 | 80.0 - 600.0 | 12.00 | 9.50 | +0.20 |
| 760.4100 | 80.0 - 600.0 | 12.00 | 10.00 | +0.25 |
Materials
| Profiled seal | V-Shaped spring | 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 |
I | X10 Cr Ni 18-8 | -200°C/+260°C | Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
| DC | C | PTFE +25% Carbon |
Grey |
Improvement
Good resistance to chemical products Efficient as part of dynamic |
||||
| CG | C | PTFE + 23% Carbon + 2% Graphite |
Black | |||||
| 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 |
Steel Chrome steel Cast iron |
|||
| VM | M | PTFE + 15 % Glass + 5% MoS2 |
Grey | |||||
| DX | X | GL Blue PTFE + Glass + Metal oxides |
Turquoise blue | Compression resistant Wear resistant Excellent chemical stability Good thermal conductivity |
||||
| 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 |
Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
|||
| K1 | K | PTFE + 10% Ekonol |
Light brown | Improvement
Good friction coefficient and low permeability |
||||
| K2 | K | PTFE + 20% Ekonol |
Light brown | |||||
| 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 |
Steel Chrome steel Cast iron |
|||
| B4 | B | PTFE + 40% Bronze |
Dark brown | |||||
| HG | HG | PE-UHMW | White or off-white | Excellent wear resistance on contact with water and air | I | X10 Cr Ni 18-8 | -70°C/+80°C | Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface |
Other grades of materials are available depending on your specificities.
Technical data
Surface roughness
| Roughness | Hydrogen, helium, cryogenic gas, refrigerants | Low viscosity fluids (water, alcohols, natural gases, air) | High viscosity fluids (gear oils, dairy products, adhesives) |
|---|---|---|---|
| Ra | ≤ 0.3 µm | ≤ 0.6 µm | ≤ 0.8 µm |
| Rz | ≤ 2.2 µm | ≤ 3.5 µm | ≤ 5.0 µm |
| Rmax | ≤ 3.5 µm | ≤ 5.0 µm | ≤ 6.5 µm |
Radius
| Groove depth h |
Radius R1 |
|---|---|
| 1.45 | 0.40 |
| 2.25 | 0.40 |
| 3.10 | 0.60 |
| 4.70 | 0.80 |
| 6.10 | 0.80 |
Only on request