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BECA 760 - 769

BECA 760 - 769
BECA 760

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
Fire-resistant liquids
Biocompatible fluids
Water
Others (contact our experts)

Applications

Food & Beverage
Medical
Pharmaceutical
Static hydraulics

Materials

Profiled seal

Bronze-filled PTFE
Carbon-filled PTFE

V-Shaped spring

Stainless steel

Dimensions
Installation dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint facial externe - Housing Groove External facial seal - BECA 760 - 769

Installation dimensions

Housing Groove External Face Seal - BECA 760 - 769

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

  • Wear properties
  • Compression set

Good resistance to chemical products
Thermal and electrical conductivity
Anti-static

Efficient as part of dynamic
applications with compression

CG C PTFE
+ 23% Carbon
+ 2% Graphite
Black
DV V PTFE
+ 25 % Glass
Blue Improvement
  • Wear properties
  • Mechanical strength
Slightly more abrasive but can be
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
  • Wear properties
Reduced wear on metal parts
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
  • Better abrasion resistance
  • Better dimensional stability at high temperatures
Use up to +300°C
Good friction coefficient and low permeability
K2 K PTFE
+ 20% Ekonol
Light brown
DB B PTFE
+ 60% Bronze
Dark brown Improvement
  • Wear properties
  • Deformation and creep resistance
  • Compression resistant
Self-lubricating
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

Housing Groove External Face Seal - BECA 760 - 769

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