BECA 478

BECA 478
beca_478_3d_v1
beca_478_3d_v2

Description

The BECA 478 profile is a wiper seal composed of a thin brass wiping lip assembled in tandem with a second rubber wiping lip in a metal shell. This seal is designed to efficiently remove the solid particles (ice, mud) and all other impurities that stick to the rod.

Advantages

Very good external wiping effect even for stubborn soiling (ice, mud)
Very good abrasion resistance
Assembly in open groove

Technical data

Temperature

-40°C/+100°C

Speed

1 m/s

Medias

Mineral oils
Fire-resistant hydraulic fluids (HFA, HFB and HFC)
Water
Air

Applications

Cold and heavily contaminated environments
Agriculture
Mobile machinery
Material handling - Lifting
Hydraulic cylinders

Materials

Primary sealing lip

Brass

Secondary sealing lip

NBR 70 Shore A

Metal cage

Steel

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint racleur - Housing Groove Gland Wiper seal Scraper seal BECA 478

Materials

Metal cage

The table below shows the materials that we can offer for metal cages and springs.

Application Material Standard Characteristics
Metal cage Non-alloy standard steel AISI 1010
(DIN 1624)
Cold rolled steel
Metal cage Nickel chrome steel AISI 304
(DIN 1.4301 - V2A)
Standard stainless steel

NBR

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
-40°C / +100°C with our low-temperature NBR

Brass

The brasses are alloys composed of copper and zinc with varying proportions.

Technical data

Housing Groove Gland Wiper Scraper Seal - BECA 478

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

Chamfer

The chamfer length as well as the chamfer angle are determined by the rod seal.

Only on request