EN
Telephone

+33 (0)2 51 42 13 76

Search
Quality & expertise
for your sealing needs

BECA 008P Piston

BECA 008P Piston
BECA 008 PTFE

Description

The BECA 008P Piston 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
< 20 MPa in alternating 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
Design guidelines

Dimensions

Installation drawingLogement Gorge Bague anti-extrusion - Housing Groove Back-up ring - BECA 008P

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

Housing Groove - BECA 008P Piston

Installation dimensions in static and dynamic applications - External (cylinder) sealing only.

O'Ring Back-up ring Housing dimensions Radius
Cross-section
Ød2
Radial height
W0
Thickness Cylinder sealing Groove width
Groove diameter
Ød3 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 D4 - 2.20 D4 - 2.20 3.20 4.20 3.25 4.25 0.25
1.60 1.15 1.20 1.00 D4 - 2.30 D4 - 2.40 3.50 4.50 3.40 4.40 0.25
1.78 1.30 1.35 1.40 D4 - 2.60 D4 - 2.70 4.10 5.50 4.00 5.40 0.25
1.80 1.30 1.35 1.40 D4 - 2.60 D4 - 2.70 4.10 5.50 4.00 5.40 0.25
2.00 1.50 1.55 1.40 D4 - 3.00 D4 - 3.10 4.30 5.70 4.20 5.60 0.25
2.40 1.80 1.90 1.40 D4 - 3.60 D4 - 3.80 4.80 6.20 4.60 6.00 0.25
2.50 1.90 1.95 1.40 D4 - 3.80 D4 - 3.90 4.90 6.30 4.80 6.20 0.25
2.62 2.00 2.05 1.40 D4 - 4.00 D4 - 4.10 5.00 6.40 4.90 6.30 0.25
2.65 2.00 2.10 1.40 D4 - 4.00 D4 - 4.20 5.10 6.50 4.90 6.30 0.25
3.00 2.30 2.40 1.40 D4 - 4.60 D4 - 4.80 5.90 7.30 5.70 7.10 0.25
3.53 2.70 2.85 1.40 D4 - 5.40 D4 - 5.70 6.50 7.90 6.30 7.70 0.25
3.55 2.70 2.90 1.40 D4 - 5.40 D4 - 5.80 6.60 8.00 6.30 7.70 0.25
4.00 3.10 3.25 1.40 D4 - 6.20 D4 - 6.50 7.00 8.40 6.80 8.20 0.25
5.00 4.00 4.10 1.70 D4 - 8.00 D4 - 8.20 8.40 10.10 8.30 10.00 0.25
5.30 4.30 4.40 1.70 D4 - 8.60 D4 - 8.80 8.60 10.30 8.50 10.20 0.25
5.33 4.30 4.40 1.70 D4 - 8.60 D4 - 8.80 8.80 10.50 8.50 10.20 0.25
5.70 4.60 4.80 1.70 D4 - 9.20 D4 - 9.60 9.10 10.80 8.80 10.50 0.25
6.00 4.90 5.10 1.70 D4 - 9.80 D4 - 10.20 9.50 11.20 9.10 10.80 0.25
6.99 5.80 5.90 2.50 D4 - 11.60 D4 - 11.80 11.80 14.30 11.70 14.20 0.25
8.00 6.70 7.00 2.50 D4 - 13.40 D4 - 14.00 12.70 15.20 12.40 14.90 0.25
8.40 7.10 7.30 2.50 D4 - 14.20 D4 - 14.60 13.00 15.50 12.80 15.30 0.25
92 dimensions found
008.006034
Standard request
6,0 x 1,3 x 1,4 6,00 3,40 4,10 5,50 0,25 010.1A039 2,90 x 1,78
008.006038
Standard request
6,0 x 1,1 x 1,0 6,00 3,80 3,20 4,20 0,25 010.1B165 3,50 x 1,50
008.008058
Standard request
8,0 x 1,1 x 1,0 8,00 5,80 3,20 4,20 0,25 010.1B180 5,50 x 1,50
008.010078
Standard request
10,0 x 1,1 x 1,0 10,00 7,80 3,20 4,20 0,25 010.1B189 7,50 x 1,50
008.012009
Standard request
12,0 x 1,5 x 1,4 12,00 9,00 4,30 5,70 0,25 010.1B487 8,50 x 2,00
008.012094
Standard request
12,0 x 1,3 x 1,4 12,00 9,40 4,10 5,50 0,25 010.1A048 9,25 x 1,78
008.014011
Standard request
14,0 x 1,5 x 1,4 14,00 11,00 4,30 5,70 0,25 010.1B492 10,00 x 2,00
008.014114
Standard request
14,0 x 1,3 x 1,4 14,00 11,40 4,10 5,50 0,25 010.1A050 10,82 x 1,78
008.015124
Standard request
15,0 x 1,3 x 1,4 15,00 12,40 4,10 5,50 0,25 010.1A052 12,42 x 1,78
008.016013
Standard request
16,0 x 1,5 x 1,4 16,00 13,00 4,30 5,70 0,25 010.1B498 12,00 x 2,00
008.016134
Standard request
16,0 x 1,3 x 1,4 16,00 13,40 4,10 5,50 0,25 010.1A053 14,00 x 1,78
008.018154
Standard request
18,0 x 1,3 x 1,4 18,00 15,40 4,10 5,50 0,25 010.1A054 15,60 x 1,78
008.020017
Standard request
20,0 x 1,5 x 1,4 20,00 17,00 4,30 5,70 0,25 010.1B519 16,00 x 2,00
008.020174
Standard request
20,0 x 1,3 x 1,4 20,00 17,40 4,10 5,50 0,25 010.1A055 17,17 x 1,78
008.022019
Standard request
22,0 x 1,5 x 1,4 22,00 19,00 4,30 5,70 0,25 010.1B519 16,00 x 2,00
008.022194
Standard request
22,0 x 1,3 x 1,4 22,00 19,40 4,10 5,50 0,25 010.1A056 18,77 x 1,78
008.025022
Standard request
25,0 x 1,5 x 1,4 25,00 22,00 4,30 5,70 0,25 010.1B534 21,00 x 2,00
008.025224
Standard request
25,0 x 1,3 x 1,4 25,00 22,40 4,10 5,50 0,25 010.1A058 21,95 x 1,78
008.028234
Standard request
28,0 x 2,3 x 1,4 28,00 23,40 5,90 7,30 0,25 010.1BE19 22,00 x 3,00
008.028024
Standard request
28,0 x 2,0 x 1,4 28,00 24,00 5,00 6,40 0,25 010.1A205 23,47 x 2,62
008.030254
Standard request
30,0 x 1,5 x 1,4 30,00 25,40 4,30 5,70 0,25 010.1B543 24,00 x 2,00
008.030026
Standard request
30,0 x 2,0 x 1,4 30,00 26,00 5,00 6,40 0,25 010.1A207 25,07 x 2,62
008.032274
Standard request
32,0 x 2,3 x 1,4 32,00 27,40 5,90 7,30 0,25 010.1BE34 26,00 x 3,00
008.035304
Standard request
35,0 x 2,3 x 1,4 35,00 30,40 5,90 7,30 0,25 010.1A294 29,20 x 3,00
008.035031
Standard request
35,0 x 2,0 x 1,4 35,00 31,00 5,00 6,40 0,25 010.1A210 29,82 x 2,62
008.040354
Standard request
40,0 x 2,3 x 1,4 40,00 35,40 5,90 7,30 0,25 010.1BE73 34,00 x 3,00
008.042374
Standard request
42,0 x 2,3 x 1,4 42,00 37,40 5,90 7,30 0,25 010.1A304 36,00 x 3,00
008.042038
Standard request
42,0 x 2,0 x 1,4 42,00 38,00 5,00 6,40 0,25 010.1A214 36,17 x 2,62
008.045040
Standard request
45,0 x 2,3 x 1,4 45,00 40,00 5,90 7,30 0,25 010.1BE94 39,00 x 3,00
008.045041
Standard request
45,0 x 2,0 x 1,4 45,00 41,00 5,00 6,40 0,25 010.1A216 39,34 x 2,62
008.048418
Standard request
48,0 x 3,1 x 1,7 48,00 41,80 7,30 9,00 0,25 010.1BS39 40,00 x 4,00
008.048426
Standard request
48,0 x 2,7 x 1,4 48,00 42,60 6,50 7,90 0,25 010.1A382 40,87 x 3,53
008.050438
Standard request
50,0 x 3,1 x 1,7 50,00 43,80 7,30 9,00 0,25 010.1BS45 42,00 x 4,00
008.050446
Standard request
50,0 x 2,7 x 1,4 50,00 44,60 6,50 7,90 0,25 010.1A385 44,04 x 3,53
008.052458
Standard request
52,0 x 3,1 x 1,7 52,00 45,80 7,30 9,00 0,25 010.1BS51 44,00 x 4,00
008.052466
Standard request
52,0 x 2,7 x 1,4 52,00 46,60 6,50 7,90 0,25 010.1A385 44,04 x 3,53
008.055488
Standard request
55,0 x 3,1 x 1,7 55,00 48,80 7,30 9,00 0,25 010.1BS60 47,00 x 4,00
008.055496
Standard request
55,0 x 2,7 x 1,4 55,00 49,60 6,50 7,90 0,25 010.1A388 47,22 x 3,53
008.060538
Standard request
60,0 x 3,1 x 1,7 60,00 53,80 7,30 9,00 0,25 010.1BS72 52,00 x 4,00
008.060546
Standard request
60,0 x 2,7 x 1,4 60,00 54,60 6,50 7,90 0,25 010.1A394 53,57 x 3,53
008.063568
Standard request
63,0 x 3,1 x 1,7 63,00 56,80 7,30 9,00 0,25 010.1A480 55,00 x 4,00
008.063576
Standard request
63,0 x 2,7 x 1,4 63,00 57,60 6,50 7,90 0,25 010.1A397 56,74 x 3,53
008.065588
Standard request
65,0 x 3,1 x 1,7 65,00 58,80 7,30 9,00 0,25 010.1BS87 57,00 x 4,00
008.065596
Standard request
65,0 x 2,7 x 1,4 65,00 59,60 6,50 7,90 0,25 010.1A397 56,74 x 3,53
008.070638
Standard request
70,0 x 3,1 x 1,7 70,00 63,80 7,30 9,00 0,25 010.1BT02 62,00 x 4,00
008.070646
Standard request
70,0 x 2,7 x 1,4 70,00 64,60 6,50 7,90 0,25 010.1A403 63,09 x 3,53
008.075688
Standard request
75,0 x 3,1 x 1,7 75,00 68,80 7,30 9,00 0,25 010.1BT14 67,00 x 4,00
008.075696
Standard request
75,0 x 2,7 x 1,4 75,00 69,60 6,50 7,90 0,25 010.1A406 66,27 x 3,53
008.080738
Standard request
80,0 x 3,1 x 1,7 80,00 73,80 7,30 9,00 0,25 010.1BT26 72,00 x 4,00
008.080746
Standard request
80,0 x 2,7 x 1,4 80,00 74,60 6,50 7,90 0,25 010.1A412 72,62 x 3,53
008.085788
Standard request
85,0 x 3,1 x 1,7 85,00 78,80 7,30 9,00 0,25 010.1BT41 77,00 x 4,00
008.085796
Standard request
85,0 x 2,7 x 1,4 85,00 79,60 6,50 7,90 0,25 010.1A416 78,97 x 3,53
008.090814
Standard request
90,0 x 4,3 x 1,7 90,00 81,40 8,80 10,50 0,25 010.1A558 78,74 x 5,33
008.090082
Standard request
90,0 x 4,0 x 1,7 90,00 82,00 8,40 10,10 0,25 010.1BK53 80,00 x 5,00
008.095864
Standard request
95,0 x 4,3 x 1,7 95,00 86,40 8,80 10,50 0,25 010.1A561 85,09 x 5,33
008.095087
Standard request
95,0 x 4,0 x 1,7 95,00 87,00 8,40 10,10 0,25 010.1BK53 80,00 x 5,00
008.100914
Standard request
100,0 x 4,3 x 1,7 100,00 91,40 8,80 10,50 0,25 010.1A564 91,44 x 5,33
008.100092
Standard request
100,0 x 4,0 x 1,7 100,00 92,00 8,40 10,10 0,25 010.1BK68 90,00 x 5,00
008.105964
Standard request
105,0 x 4,3 x 1,7 105,00 96,40 8,80 10,50 0,25 010.1A565 94,62 x 5,33
008.105097
Standard request
105,0 x 4,0 x 1,7 105,00 97,00 8,40 10,10 0,25 010.1BK77 95,00 x 5,00
008.110101
Standard request
110,0 x 4,3 x 1,7 110,00 101,40 8,80 10,50 0,25 010.1A568 100,97 x 5,33
008.110102
Standard request
110,0 x 4,0 x 1,7 110,00 102,00 8,40 10,10 0,25 010.1BK86 100,00 x 5,00
008.115106
Standard request
115,0 x 4,3 x 1,7 115,00 106,40 8,80 10,50 0,25 010.1A569 104,14 x 5,33
008.115107
Standard request
115,0 x 4,0 x 1,7 115,00 107,00 8,40 10,10 0,25 010.1BK98 105,00 x 5,00
008.120111
Standard request
120,0 x 4,3 x 1,7 120,00 111,40 8,80 10,50 0,25 010.1A572 110,49 x 5,33
008.120112
Standard request
120,0 x 4,0 x 1,7 120,00 112,00 8,40 10,10 0,25 010.1BW07 110,00 x 5,00
008.125116
Standard request
125,0 x 4,3 x 1,7 125,00 116,40 8,80 10,50 0,25 010.1A573 113,67 x 5,33
008.125117
Standard request
125,0 x 4,0 x 1,7 125,00 117,00 8,40 10,10 0,25 010.1BW16 115,00 x 5,00
008.130121
Standard request
130,0 x 4,3 x 1,7 130,00 121,40 8,80 10,50 0,25 010.1A576 120,02 x 5,33
008.130122
Standard request
130,0 x 4,0 x 1,7 130,00 122,00 8,40 10,10 0,25 010.1A489 120,00 x 5,00
008.135123
Standard request
135,0 x 5,8 x 2,5 135,00 123,40 11,80 14,30 0,25 010.1A741 120,02 x 6,99
008.140128
Standard request
140,0 x 5,8 x 2,5 140,00 128,40 11,80 14,30 0,25 010.1A744 126,37 x 6,99
008.150138
Standard request
150,0 x 5,8 x 2,5 150,00 138,40 11,80 14,30 0,25 010.1A748 135,89 x 6,99
008.160148
Standard request
160,0 x 5,8 x 2,5 160,00 148,40 11,80 14,30 0,25 010.1A751 145,42 x 6,99
008.170158
Standard request
170,0 x 5,8 x 2,5 170,00 158,40 11,80 14,30 0,25 010.1A755 158,12 x 6,99
008.180168
Standard request
180,0 x 5,8 x 2,5 180,00 168,40 11,80 14,30 0,25 010.1A758 164,47 x 6,99
008.190178
Standard request
190,0 x 5,8 x 2,5 190,00 178,40 11,80 14,30 0,25 010.1A763 177,17 x 6,99
008.200188
Standard request
200,0 x 5,8 x 2,5 200,00 188,40 11,80 14,30 0,25 010.1A765 183,52 x 6,99
008.210198
Standard request
210,0 x 5,8 x 2,5 210,00 198,40 11,80 14,30 0,25 010.1A769 196,22 x 6,99
008.220208
Standard request
220,0 x 5,8 x 2,5 220,00 208,40 11,80 14,30 0,25 010.1A771 202,57 x 6,99
008.230218
Standard request
230,0 x 5,8 x 2,5 230,00 218,40 11,80 14,30 0,25 010.1A773 215,27 x 6,99
008.240228
Standard request
240,0 x 5,8 x 2,5 240,00 228,40 11,80 14,30 0,25 010.1A775 227,97 x 6,99
008.250238
Standard request
250,0 x 5,8 x 2,5 250,00 238,40 11,80 14,30 0,25 010.1A777 240,67 x 6,99
008.280268
Standard request
280,0 x 5,8 x 2,5 280,00 268,40 11,80 14,30 0,25 010.1A781 266,07 x 6,99
008.300288
Standard request
300,0 x 5,8 x 2,5 300,00 288,40 11,80 14,30 0,25 010.1A783 278,77 x 6,99
008.320308
Standard request
320,0 x 5,8 x 2,5 320,00 308,40 11,80 14,30 0,25 010.1A787 304,17 x 6,99
008.350338
Standard request
350,0 x 5,8 x 2,5 350,00 338,40 11,80 14,30 0,25 010.1A789 329,57 x 6,99
008.400388
Standard request
400,0 x 5,8 x 2,5 400,00 388,40 11,80 14,30 0,25 010.1A793 380,37 x 6,99
008.420408
Standard request
420,0 x 5,8 x 2,5 420,00 408,40 11,80 14,30 0,25 010.1A795 405,26 x 6,99
008.450438
Standard request
450,0 x 5,8 x 2,5 450,00 438,40 11,80 14,30 0,25 010.1A797 430,66 x 6,99
008.480468
Standard request
480,0 x 5,8 x 2,5 480,00 468,40 11,80 14,30 0,25 010.1A799 456,06 x 6,99
008.500488
Standard request
500,0 x 5,8 x 2,5 500,00 488,40 11,80 14,30 0,25 010.1A801 481,46 x 6,99