BECA 336/AE

BECA 336/AE
BECA 336/AE
beca_336_ae_3d_v1
beca_336_ae_3d_v2

Description

The BECA 336/AE profile is a U-ring type single acting piston seal with asymmetrical lips composed of a polyurethane profile ring and a POM back-up ring on the back.

Advantages

Optimised sealing effect at both high and low pressures
Excellent abrasion and wear resistance
Excellent extrusion resistance

Technical data

Temperature

-30°C/+110°C

Pressure

50 MPa

Speed

0.5 m/s

Medias

Mineral hydraulic oils

Applications

Mobile machinery
Injection presses
Machine tools
Presses
Hydraulic cylinders

Materials

Profiled seal

PU 93 Shore A - Blue
PU 96 Shore A - Blue
High temp. PU 96 Shore A - Beige

Back-up ring

Polyoxymethylene (POM)

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de piston - Housing Groove Gland Piston seal BECA 336/AE

Materials

PU

Polyurethane is a material that has the elastic properties of rubber. The proportion in its composition (diisocyanate, polyol, chain extender) is determined by its properties. This material is characterised by a strong mechanical resistance, good wear resistance, high elastic modulus, good flexibility and a very good ozone and oxidation resistance.

Chemical resistance Pure aliphatic hydrocarbons (propane, butane)
Mineral oils and greases
Silicone oils and greases
Water up to +50°C
Compatibility issue Ketones, esters, ethers, alcohols and glycols
Hot water, steam, alkalis, amines and acids
Temperature range -30°C/+90°C
-30°C / +110°C with our PUHT (short term peak at 150°C)

Polyoxymethylene - POM

Polyoxymethylene (POM or polyacetal) belongs to the thermoplastics, which have a number of advantages - strong mechanical resistance, good creep strength, high resistance to shocks, particularly at low temperatures, good wear resistance, good sliding coefficient, excellent machinability and good dielectric properties. The low water absorption coefficient, unlike polyamide (PA), also gives this material an excellent dimensional stability.

Chemical resistance Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Water
Compatibility issue Acids
Temperature range -50°C/+115°C

Technical data

Housing Groove Piston Seal - BECA - 336/AE

Extrusion gaps

Bore diameter
ØD1
Radial extrusion gap
F/2
≤ 5 MPa ≤ 10 MPa ≤ 20 MPa ≤ 30 MPa ≤ 40 MPa ≤ 50 MPa
≤ 60 mm 0.40 0.30 0.20 0.15 0.10 0.07
> 60 mm 0.50 0.40 0.30 0.20 0.15 0.10

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

Chamfers and radius

Radial section
S
Radius
R1
Radius
R2
Chamfer
C
3.00 0.20 0.40 2.00
4.00 0.20 0.40 2.50
5.00 0.40 0.60 3.00
7.50 0.80 1.00 4.00
10.00 0.80 1.00 5.00

Only on request