BECA 008P Rod
Description
The BECA 008P Rod profile is a back-up ring cut at 30°, which has a concave shape that allows it to fit snugly against the O'Ring. The ring is systematically assembled in tandem with an O'Ring and an X'Ring. An uncut version of this profile can be made.
Advantages
Used in static and dynamic applications
May be used for alternating movement applications
Large contact surface area, which protects the O'Ring from deformation caused by pulsating pressures
Preferred assembly in a closed groove for profiles cut at 30°
Assembly in open groove for uncut profiles
Technical data
| Temperature | -200°C/+260°C |
|---|---|
| Pressure | < 250 MPa in static applications |
| Speed | 2 m/s in alternating applications |
| Medias | The majority of liquids, or gaseous or chemical fluids, depending on the type of material selected. Refer to our fluids-materials compatibility guide. |
Applications
Automotive
Hydraulic equipment
Mobile machinery
Machine tools
Injection presses
Valves
Hydraulic cylinders
Materials
Standard virgin PTFE
Filled PTFE (fibreglass, carbon, bronze)
Other materials may be used
Dimensions
Materials
The table below indicates the main materials that may be considered for making BECA 008 P back-up rings.
| Materials | Code |
|---|---|
| Virgin PTFE | P |
| Fibreglass-filled PTFE | V |
| Bronze-filled PTFE | B |
| Carbon-filled PTFE | C |
| Polyurethane 93 Shore A / 96 Shore D | U |
| PEEK | T |
| Polyoxymethylene (POM) | H |
| Polyamide (PA) | D |
Design guidelines
Installation dimensions in static and dynamic applications - Internal (rod) sealing only
| O'Ring | Back-up ring | Housing dimensions | Radius | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cross-section Ød2 |
Radial height W0 |
Thickness | Rod sealing | Groove width | ||||||
| Groove diameter ØD6 H9 |
Static | Dynamic | ||||||||
| static | dynamic | T0 | static | dynamic | L2 0/+0.20 | L3 0/+0.20 | L2 0/+020 | L3 0/+0.20 | R1 ±0.20 | |
| 1.50 | 1.10 | 1.10 | 1.00 | d5 + 2.20 | d5 + 2.20 | 3.20 | 4.20 | 3.25 | 4.25 | 0.25 |
| 1.60 | 1.15 | 1.20 | 1.00 | d5 + 2.30 | d5 + 2.40 | 3.50 | 4.50 | 3.40 | 4.40 | 0.25 |
| 1.78 | 1.30 | 1.35 | 1.40 | d5 + 2.60 | d5 + 2.70 | 4.10 | 5.50 | 4.00 | 5.40 | 0.25 |
| 1.80 | 1.30 | 1.35 | 1.40 | d5 + 2.60 | d5 + 2.70 | 4.10 | 5.50 | 4.00 | 5.40 | 0.25 |
| 2.00 | 1.50 | 1.55 | 1.40 | d5 + 3.00 | d5 + 3.10 | 4.30 | 5.70 | 4.20 | 5.60 | 0.25 |
| 2.40 | 1.80 | 1.90 | 1.40 | d5 + 3.60 | d5 + 3.80 | 4.80 | 6.20 | 4.60 | 6.00 | 0.25 |
| 2.50 | 1.90 | 1.95 | 1.40 | d5 + 3.80 | d5 + 3.90 | 4.90 | 6.30 | 4.80 | 6.20 | 0.25 |
| 2.62 | 2.00 | 2.05 | 1.40 | d5 + 4.00 | d5 + 4.10 | 5.00 | 6.40 | 4.90 | 6.30 | 0.25 |
| 2.65 | 2.00 | 2.10 | 1.40 | d5 + 4.00 | d5 + 4.20 | 5.10 | 6.50 | 4.90 | 6.30 | 0.25 |
| 3.00 | 2.30 | 2.40 | 1.40 | d5 + 4.60 | d5 + 4.80 | 5.90 | 7.30 | 5.70 | 7.10 | 0.25 |
| 3.53 | 2.70 | 2.85 | 1.40 | d5 + 5.40 | d5 + 5.70 | 6.50 | 7.90 | 6.30 | 7.70 | 0.25 |
| 3.55 | 2.70 | 2.90 | 1.40 | d5 + 5.40 | d5 + 5.80 | 6.60 | 8.00 | 6.30 | 7.70 | 0.25 |
| 4.00 | 3.10 | 3.25 | 1.40 | d5 + 6.20 | d5 + 6.50 | 7.00 | 8.40 | 6.80 | 8.20 | 0.25 |
| 5.00 | 4.00 | 4.10 | 1.70 | d5 + 8.00 | d5 + 8.20 | 8.40 | 10.10 | 8.30 | 10.00 | 0.25 |
| 5.30 | 4.30 | 4.40 | 1.70 | d5 + 8.60 | d5 + 8.80 | 8.60 | 10.30 | 8.50 | 10.20 | 0.25 |
| 5.33 | 4.30 | 4.40 | 1.70 | d5 + 8.60 | d5 + 8.80 | 8.80 | 10.50 | 8.50 | 10.20 | 0.25 |
| 5.70 | 4.60 | 4.80 | 1.70 | d5 + 9.20 | d5 + 9.60 | 9.10 | 10.80 | 8.80 | 10.50 | 0.25 |
| 6.00 | 4.90 | 5.10 | 1.70 | d5 + 9.80 | d5 + 10.20 | 9.50 | 11.20 | 9.10 | 10.80 | 0.25 |
| 6.99 | 5.80 | 5.90 | 2.50 | d5 + 11.60 | d5 + 11.80 | 11.80 | 14.30 | 11.70 | 14.20 | 0.25 |
| 8.00 | 6.70 | 7.00 | 2.50 | d5 + 13.40 | d5 + 14.00 | 12.70 | 15.20 | 12.40 | 14.90 | 0.25 |
| 8.40 | 7.10 | 7.30 | 2.50 | d5 + 14.20 | d5 + 14.60 | 13.00 | 15.50 | 12.80 | 15.30 | 0.25 |
|
008.350361
|
350,0 x 5,8 x 2,5 | 350,00 | 361,60 | 11,80 | 14,30 | 0,25 | 010.1A791 | 354,97 x 6,99 |
|
008.360371
|
360,0 x 5,8 x 2,5 | 360,00 | 371,60 | 11,80 | 14,30 | 0,25 | 010.1A791 | 354,97 x 6,99 |
|
008.400411
|
400,0 x 5,8 x 2,5 | 400,00 | 411,60 | 11,80 | 14,30 | 0,25 | 010.1A795 | 405,26 x 6,99 |
