Piston U-Ring P29

DESCRIPTION
Single-acting Piston U-Ring P29 with asymmetrical profile and shortened outer lip. Recommended up to 10 Mpa working pressure. An back-up ring will extended working pressure up to 16 Mpa.

Piston U-Ring P29 can be installed in “back-to-back” position in double-acting piston design with pressure on both sides. It has Very good static and dynamic tightness and is good choice for specific requirements.

APPLICATION
Light hydraulic cylinders.
Pneumatic cilinders
Earth moving equipment
Industrial vehicles
Agriculture equipment

MATERIAL

Standrad material
Material base NBR 85 NBR 85 NBR 80 FPM 85


For applications that may require alternative materials or for verification current availability of tools and part numbers, contact us.

OPERATING CONDITIONS

Pressure, Speed
Working pressure, P 10 MPa
Running speed, v 0,5 m/s
Medium, Working Temperature
Material code N4280 N5185 N7272 F9193
Hydraulic oils HL, HLP -30 to 100˚C -50 to 90˚C -60 to 80˚C -15 to +200˚C
HFA, HFB fluids +5 to +60˚C +5 to +60˚C +5 to +60˚C –
HFC fluids -30 to +60˚C -30 to +60˚C -30 to +60˚C –
HFD fluids – – – -15 to +200˚C
Water +5 to +90˚C +5 to +90˚C +5 to +80˚C –
Mineral greases -30 to +100˚C -50 to +90˚C -60 to +80˚C -15 to +200˚C

DESIGN RECOMMENDATION

Max. permissible gap dimension, emax
Max operating pressure S ≤ 7,5mm S > 7,5mm
5 Mpa 0,30 0,35
10 Mpa 0,20 0,25

 

Surface quality*
Surface roughness Ra Rmax
Sliding surfaces 0.05.. 0,3 μm ≤ 2,5 μm
Groove base ≤ 1,6 μm ≤ 6,3 μm
Groove flanks ≤ 3,0 μm ≤ 15 μm

*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0%

ØD
Ød
H
L
S
Material
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ØD
Ød
H
L
S
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C
Material
Order code
42
22
10
11
10
36
6
N7272
P29-208239
45
30
10
11
7.5
41
5.5
N7272
P29-208240
50
30
12
13
10
44
6
N7272
P29-208241
50
35
10
11
7.5
46
5.5
N7272
P29-208242
55
40
10
11
7.5
51
5.5
N7272
P29-208243
60
40
12
13
10
54
6
N7272
P29-208244
60
45
10
11
7.5
56
5.5
N7272
P29-208245
65
50
10
11
7.5
61
5.5
N7272
P29-208246
70
50
12
13
10
64
6
N7272
P29-208247
70
55
12
13
7.5
66
5.5
N7272
P29-208248
80
60
12
13
10
74
6
N7272
P29-208249
80
65
12
13
7.5
76
5.5
N7272
P29-208250
85
70
12
13
7.5
81
5.5
N7272
P29-208251
90
75
12
13
7.5
86
5.5
N7272
P29-208252
95
75
12
13
10
89
6
N7272
P29-208253
100
80
15
16
10
94
6
N7272
P29-208254
100
85
12
13
7.5
96
5.5
N7272
P29-208255
105
85
15
16
10
99
6
N7272
P29-208256
105
90
12
13
7.5
101
5.5
N7272
P29-208257
110
85
15
16
12.5
103
6.5
N7272
P29-208258
110
90
15
16
10
104
6
N7272
P29-208259
115
90
15
16
12.5
108
6.5
N7272
P29-208260
120
95
15
16
12.5
113
6.5
N7272
P29-208261
120
100
15
16
10
114
6
N7272
P29-208262
125
100
15
16
12.5
118
6.5
N7272
P29-208263
125
105
15
16
10
119
6
N7272
P29-208264
140
115
15
16
12.5
133
6.5
N7272
P29-208265
160
135
18
19
12.5
153
6.5
N7272
P29-208266
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