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BECA 300

BECA 300
beca_300_3d_v1
beca_300_3d_v2

Description

The BECA 300 profile is a single acting compo-compact rod seal composed of a profiled rubber seal and a filled PTFE or POM back-up ring on the back depending on the type of application.

Advantages

Optimised sealing effect
Good chemical compatibility, depending on the material chosen
Excellent wear resistance
Excellent extrusion resistance

Technical data

Temperature

-30°C/+200°C

Pressure

27.5 MPa

Speed

0.5 m/s

Medias

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

Applications

Mobile machinery
Material handling - Lifting
Presses
Hydraulic cylinders

Materials

Profiled seal

NBR 80 Shore A
FKM 80 Shore A

Back-up ring

Polyoxymethylene (POM)
Bronze-filled PTFE

Dimensions
Materials
Technical data

Dimensions

Installation drawingLogement Gorge Joint de tige - Housing Groove Gland Rod seal BECA 300

Materials

Profiled seal

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
FKM

Depending on their structure and fluorine content, the chemical resistance and resistance to the cold in fluororubbers can vary. This FKM-based rubber is very often used for high-temperature hydraulics and pneumatics, for 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)
Fuel (including high alcohol content)
Atmospheric and ozone agents
Compatibility issue Glycol-based brake fluids
Ammonia gas
Organic acids with a low molecular weight (formic and acetic acids)
Temperature range -20°C/+200°C
-40°C / +200°C with our FKM GLT on request

Back-up ring

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
Bronze-filled PTFE

PTFE is a thermoplastic polymer made of tetrafluoroethylene with exceptional properties - very low friction coefficient (adhesive friction and sliding friction are almost equal), physiologically safe for temperatures up to +200°C, excellent electrical insulation properties, and excellent chemical compatibility with the majority of fluids. On the other hand, as this material is plastic and not elastic, so it cannot easily replace rubber bases.

Between 40% and 60% of bronze is added to the PTFE as a filler. This machined material has excellent wear resistance, low creep deformation and good thermal conductivity.

Technical data

Housing Groove Gland Rod Seal - BECA 300

Extrusion gaps

Pressure
MPa
Radial extrusion gap
F/2
15 MPa 0.30
20 MPa 0.25
25 MPa 0.20
27.5 MPa 0.15

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
3.50 0.20 0.40 2.00
4.00 0.30 0.50 2.00
5.00 0.40 0.60 2.50
7.50 0.80 1.00 4.00
23 dimensions found
300.0012019
Standard request
12,00 19,00 5,00 5,60
300.0014021
Standard request
14,00 21,00 5,00 5,60
300.0016023
Standard request
16,00 23,00 5,00 5,60
300.0018025
Standard request
18,00 25,00 5,00 5,60
300.0020027
Standard request
20,00 27,00 5,00 5,60
300.0022029
Standard request
22,00 29,00 5,00 5,60
300.0028036
Standard request
28,00 36,00 5,70 6,30
300.0032040
Standard request
32,00 40,00 5,70 6,30
300.0035043
Standard request
35,00 43,00 5,70 6,30
300.0036044
Standard request
36,00 44,00 5,70 6,30
300.0038046
Standard request
38,00 46,00 5,70 6,30
300.0040048
Standard request
40,00 48,00 5,70 6,30
300.0045053
Standard request
45,00 53,00 5,70 6,30
300.0055065
Standard request
55,00 65,00 6,75 7,50
300.0056066
Standard request
56,00 66,00 6,75 7,50
300.0063073
Standard request
63,00 73,00 6,75 7,50
300.0070080
Standard request
70,00 80,00 6,75 7,50
300.0080090
Standard request
80,00 90,00 6,75 7,50
300.0090100
Standard request
90,00 100,00 6,75 7,50
300.0100115
Standard request
100,00 115,00 9,50 10,50
300.0110125
Standard request
110,00 125,00 9,50 10,50
300.0125140
Standard request
125,00 140,00 9,50 10,50
300.0130155
Standard request
130,00 155,00 9,50 10,50