EN
Telephone

+33 (0)2 51 42 13 76

Search
Quality & expertise
for your sealing needs

BECA 010 FEP

BECA 010 FEP
BECA 010 FEP

Description

The BECA 010 FEP profile is a rubber O'Ring, a circular ring with a round cross-section, wrapped in a FEP impermeable sheath (fluorinated ethylene propylene). Unlike PTFE O'Rings, FEP O'Rings retain their elastic properties, as with standard O'Rings, and have a great chemical resistance thanks to the FEP envelope.

Advantages

Wide temperature range
Excellent chemical resistance
Low friction coefficient; no stick-slip effect

Technical data

Temperature

FKM base: -20°C / +200°C
VMQ base: -60°C / +200°C

Pressure

Up to 25 MPa (combined with a BECA 008 back-up ring from 5 MPa)

Speed

0 m/s, static applications only

Medias

The majority of liquid, gaseous and chemical substances

Applications

Food & beverage
Chemical
Cosmetic
Medical
Petrochemical
Pharmaceutical
Water treatment

Materials

FKM with FEP envelope
VMQ with FEP envelope

Dimensions
Materials
Design recommendations

Dimensions

Materials

FEP sheath

The FEP (tetrafluoroethylene - hexafluoropropylene) sheath is a material that has same mechanical properties as PTFE (polytetrafluoroethylene). It has an excellent chemical inertia and good abrasion resistance.

FKM-FEP

Depending on their structure and fluorine content, fluoroelastomers can vary in terms of chemical resistance and resistance to cold. This FKM-based rubber is very often used for high-temperature hydraulic and pneumatic systems, industrial valves, injection/fuel systems, motor seals and high-vacuum systems.

Chemical resistance Mineral oils and greases, ASTM n°1, IRM 902 and IRM 903 oils.
Fire-resistant liquids (HFD)
Silicone oils and greases
Mineral and vegetable oils and greases
Aliphatic hydrocarbons (propane, butane, petroleum)
Aromatic hydrocarbons (benzene, toluene)
Chlorinated hydrocarbons (trichlorethylene)
Petrol (including high alcohol content)
Atmospheric and ozone agents
Compatibility issue Glycol-based brake fluids
Ammoniac gas
Organic acids with a low molecular weight (formic and acetic acids)
Temperature range -20°C / +200°C
-40°C / +200°C with special FKMs

VMQ-FEP

This FVMQ-based rubber is very often used for fuel systems.

Chemical resistance Animal and vegetable oils and greases
Moderate water temperature
Diluted saline solutions
Atmospheric and ozone agents
Compatibility issue Superheated steam up to +120°C
Chlorinated hydrocarbons with a low molecular weight (trichlorethylene)
Aromatic hydrocarbons (benzene, toluene)
Temperature range -60°C / +200°C

Design recommendations

Tolerance on the cross-section Ød2

The table below sets out the tolerances applied on the cross-sections Ød2 with minimum inside diameter Ød1 recommendations for O'Rings with a FEP envelope.

Cross-section
Ød2
Tolerances Minimum inside diameter Ød1 FEP sheath thickness
1,60 ± 0,10 7,60 0,20
1,78 7,64 0,20
2,00 8,00 0,20
2,40 9,30 0,25
2,50 10,00 0,25
2,62 9,19 0,30
2,80 10,50 0,30
3,00 ± 0,13 10,00 0,30
3,10 10,00 0,30
3,20 12,00 0,30
3,53 12,00 0,38
3,75 12,00 0,38
4,00 ± 0,25 12,00 0,38
4,20 15,00 0,38
4,50 15,00 0,38
4,70 18,00 0,38
5,00 18,00 0,38
5,33 18,42 0,50
5,50 30,00 0,50
5,70 30,00 0,50
6,00 ± 0,38 30,00 0,50
6,30 41,00 0,50
6,50 41,00 0,50
7,00 41,00 0,50
7,50 101,60 0,50
8,00 70,00 0,50
8,40 102,00 0,50
9,00 ± 0,51 102,00 0,50
9,50 102,00 0,50
10,00 108,00 0,50
10,50 127,00 0,50
11,00 127,00 0,76
12,00 152,40 0,76
12,70 177,80 0,76
13,00 254,00 0,76
14,00 254,00 0,76
15,00 254,00 0,76
16,00 305,00 sur demande
18,00 422,00 sur demande
19,00 422,00 sur demande
20,00 508,00 sur demande

The table below sets out the tolerances applied on the inside diameters Ød1 for O'Rings with a FEP envelope.

Inside diameter
Ød1

Tolerances

Ød1 < 7,64 not available
7,64 ≤ Ød1 ≤ 30,00 ± 0,25
30,00 < Ød1 ≤ 130,00 ± 0,38
130,00 < Ød1 ≤ 170,00 ± 0,51
170,00 < Ød1 ≤ 380,00 ± 0,64
380,00 < Ød1 ≤ 650,00 ± 0,76
650,00 < Ød1 ≤ 1000,00 ± 1,52
Static sealing - Installation in a rectangular groove with radial deformation

Static sealing - Installation in a rectangular groove with radial deformation - BECA 010 FEP

The table below sets out the design recommendations for radial sealing.

Radial sealing
Cross-section
Ød2
t Tolerance ± L1 Tolerance ±
1,60 1,20 0,05 2,10 0,20
1,78 1,30 0,05 2,30 0,20
2,00 1,50 0,05 2,60 0,20
2,50 1,90 0,05 3,20 0,20
2,62 2,00 0,05 3,40 0,20
3,00 2,30 0,05 3,90 0,20
3,15 2,50 0,05 4,30 0,20
3,53 2,75 0,05 4,50 0,20
4,00 3,15 0,05 5,20 0,20
4,30 3,38 0,05 5,50 0,20
4,50 3,60 0,05 5,80 0,20
5,00 4,00 0,05 6,50 0,20
5,33 4,30 0,05 6,90 0,20
5,50 4,50 0,05 7,10 0,20
5,70 4,65 0,05 7,40 0,20
6,00 4,95 0,05 7,80 0,20
6,30 5,25 0,05 8,20 0,20
6,99 5,85 0,05 9,10 0,20
8,00 6,75 0,10 10,40 0,20
8,40 7,15 0,10 10,90 0,20
9,00 7,70 0,10 11,70 0,20
9,50 8,20 0,10 12,30 0,20
10,00 8,65 0,10 13,00 0,20
11,00 9,70 0,10 14,30 0,20
12,00 10,60 0,10 15,60 0,20
Static sealing - Installation in a rectangular groove with axial deformation

Housing Groove axial static O'Ring - BECA 010 FEP

The table below sets out the design recommendations for axial sealing.

Axial sealing
Cross-section Ød2 h Tolerance ± L4 Tolerance ±
1,60 1,20 0,02 2,50 0,20
1,78 1,30 0,02 2,70 0,20
2,00 1,40 0,02 3,00 0,20
2,50 1,83 0,03 3,50 0,20
2,62 1,96 0,03 3,75 0,20
3,00 2,25 0,05 4,15 0,20
3,15 2,55 0,05 4,60 0,20
3,53 2,65 0,05 4,95 0,20
4,00 3,05 0,05 5,25 0,20
4,30 3,25 0,05 5,50 0,20
4,50 3,45 0,05 5,80 0,20
5,00 3,85 0,05 6,40 0,20
5,33 4,30 0,05 7,25 0,20
5,50 4,38 0,05 7,30 0,20
5,70 4,45 0,05 7,40 0,20
6,00 4,85 0,05 7,80 0,20
6,30 5,20 0,05 8,20 0,20
6,99 5,75 0,05 9,10 0,20
8,00 6,40 0,07 10,20 0,20
8,40 6,65 0,07 10,90 0,20
9,00 7,30 0,07 11,70 0,20
9,50 7,80 0,10 12,30 0,20
10,00 8,20 0,10 13,00 0,20
11,00 9,20 0,10 14,30 0,20
12,00 10,00 0,10 15,60 0,20
Surface roughness

To make the tubes and rods, we recommend using non-porous steel or cast iron. For dynamic applications, brass and untreated stainless steel, as well as aluminium, are not as hard and are therefore not recommended, as they would be subjected to a lot of wear.

The roughness means that the sealing must be of a high quality. The surface roughness of grooves improves during alternating pressures.

Type of application Type of surface Roughness
Ra
Roughness
Rz
Roughness
Rmax
Radial - Static Under non-pulsating pressure
Mating surface (rod and cylinder) 1,6 µm 6,3 µm 10,0 µm
Groove diameter and groove flanks 1,6 µm 6,3 µm 10,0 µm
Under pulsating pressure
Mating surface (rod and cylinder) 0,8 µm 3,2 µm 5,0 µm
Groove diameter and groove flanks 1,6 µm 6,3 µm 10,0 µm
Axial - Static Clamping surface 1,6 µm 6,3 µm 10,0 µm
Groove flanks 1,6 µm 6,3 µm 10,0 µm
Chamfers and radius

Given that the O'Rings are fitted pre-tightened, the chamfer lengths and rounded cutting edges must fit with the table below.

Cross-section
Ød2
Radius
R1
Max radius
R2
Chamfer
C
15° 20°
1,78 - 1,80 0,30 0,20 2,50 2,00
2,62 - 2,65 0,30 0,20 3,00 2,50
3,53 - 3,55 0,60 0,20 3,50 3,00
5,33 - 5,30 0,60 0,20 4,00 3,50
6,99 - 7,00 1,00 0,20 5,00 4,00
8,40 1,00 0,20 6,00 4,50

Only on request