EN
Search

BECA 312

BECA 312
beca_312_3d_v1
beca_312_3d_v2

Description

The BECA 312 profile is a U-ring type single acting compact rod seal with symmetrical lips and made of a very dense polyurethane body and a POM back-up ring on the back. It can be assembled in a groove according to standard ISO 5597.

Advantages

Good sealing at both high and low pressures
Excellent abrasion 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
Material handling - Lifting
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

312.0200286, 312.0250336, 312.0300386, 312.0360436, 312.0400486, 312.0400501, 312.0450551, 312.0450558, 312.0500601, 312.0500609, 312.0550651, 312.0600702, 312.1045055, 312.1521622, 312.1882032, 312.1982082
Installation drawingLogement Gorge Joint de tige - Housing Groove Gland Rod seal BECA 312

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 Gland Rod Seal - BECA 312

Extrusion gaps

Rod 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 0.40 0.60 2.50
4.00 0.40 0.60 2.50
5.00 0.40 0.60 2.50
7.50 0.80 1.00 4.00
16 dimensions found
312.0200286
Standard request
20,00 28,00 6,00 7,00
312.0250336
Standard request
25,00 33,00 6,00 7,00
312.0300386
Standard request
30,00 38,00 6,00 7,00
312.0360436
Standard request
36,00 43,00 5,50 6,50
312.0400486
Standard request
40,00 48,00 6,00 7,00
312.0400501
Standard request
40,00 50,00 10,00 11,00
312.0450551
Standard request
45,00 55,00 10,00 11,00
312.0450558
Standard request
45,00 55,00 7,00 8,00
312.0500601
Standard request
50,00 60,00 10,00 11,00
312.0500609
Standard request
50,00 60,00 9,00 10,00
312.0550651
Standard request
55,00 65,00 10,00 11,00
312.0600702
Standard request
60,00 70,00 12,00 13,00
312.1045055
Standard request
45,00 55,00 10,00 11,00
312.1521622
Standard request
152,00 162,00 12,20 13,00
312.1882032
Standard request
188,00 203,00 12,20 13,00
312.1982082
Standard request
198,00 208,00 12,00 13,00