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BECA 006 Piston

BECA 006
beca_006_3d_v1
beca_006_3d_v2

Description

The BECA 006 Piston profile is a machined guide ring with a 30° angle cut as standard, made from filled PTFE.

Advantages

Substantial and improved lubrication conditions through the tear structures
Very good friction coefficient; no stick-slip effect
Good wear resistance; very long life
Increased absorption of foreign particles
Good vibration absorption

Technical data

Temperature

-60°C/+200°C

Pressure

*

Speed

15.0 m/s

Medias

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

Max. compression resistance

30 to 35 N/mm²

Radial loads in dynamic applications

15 N/mm² at 25°C
12 N/mm² at 80°C
8 N/mm² at 120°C

Applications

Aerospace
Aerospace
Military

Materials

Bronze-filled PTFE
Carbon-filled PTFE
Carbon graphite-filled PTFE

Dimensions
Installation dimensions
Materials
Design guidelines
Technical data

Dimensions

Installation drawingLogement Gorge Bague de guidage aéronautique - Housing Groove Gland - Aerospace Wear ring - BECA 006 Piston

Installation dimensions

Housing Groove Aerospace Wear Ring - BECA 006 Piston

Bore diameter
ØD1 H10
Groove diameter
Ød1 h8
Groove width
L1 0/+0.25
Extrusion gaps
F/2 max
5.97 - 37.87 D1 - 1.63 3.43 0.18
5.97 - 37.87 D1 - 1.63 6.60 0.18
5.97 - 37.87 D1 - 1.63 9.78 0.18
5.97 - 37.87 D1 - 1.63 12.95 0.18
13.97 - 113.49 D1 - 3.20 3.43 0.23
13.97 - 113.49 D1 - 3.20 6.60 0.23
13.97 - 113.49 D1 - 3.20 9.78 0.23
13.97 - 113.49 D1 - 3.20 12.95 0.23
76.02 - 266.04 D1 - 4.78 3.43 0.28
76.02 - 266.04 D1 - 4.78 6.60 0.28
76.02 - 266.04 D1 - 4.78 9.78 0.28
76.02 - 266.04 D1 - 4.78 12.95 0.28

Materials

Type of material Service temperature Characteristics Contact surface area
Filled PTFE -60°C / +150°C (+200°C) Very good friction coefficient
Good wear resistance
Good extrusion resistance
Excellent chemical inertia
Steel, chrome steel, Cast iron

Design guidelines

Guide sizing

The following formulas calculate the height "H" of the wear ring in the piston or rod seal while taking the gap into account "Z" necessary at the ends of the ring after fitting. This gap "Z" offsets the thermal expansion under the effects of temperature, and prevents intermediate pressures and drag pressures in the system.

H = (F x f) / (ØD1 x Cr)

where:

H = Min. height of guide (mm)
F = Max. radial force (N)
f = Safety coefficient (we recommend 2)
ØD1 = Bore diameter (mm)
Cr = Permissible radial load in dynamic applications (N/mm²)

Types of cuts

The wear rings are made with a 30° angle cut as standard. Other types of cuts can be made on request, as shown in the diagram below.

Types of cuts for wear rings and guide strips

Technical data

Housing Groove Aerospace Wear Ring - BECA 006 Piston

Surface roughness

Roughness Dynamic surface area Static surface area Groove flanks
Ra 0.05 - 0.2 µm ≤ 1.6 µm ≤ 3.2 µm
Rz 0.4 - 1.6 µm ≤ 6.3 µm ≤ 10.0 µm
Rmax 0.63 - 2.5 µm ≤ 10.0 µm ≤ 16.0 µm

Recommended radius of the groove diameter

Bore diameter
ØD1
Radius
R1 max
≤ 250.00 0.20
> 250.00 0.40

Only on request