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
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Material
Order code
32
20
10
11
6
28
4.5
N4280
P29-208112
35
22
10
11
6.5
31
5
N4280
P29-208113
38
25
10
11
6.5
34
5
N4280
P29-208114
40
25
10
11
7.5
36
5.5
N4280
P29-208115
42
22
10
11
10
36
6
N4280
P29-208116
45
30
10
11
7.5
41
5.5
N4280
P29-208117
50
30
12
13
10
44
6
N4280
P29-208118
50
35
10
11
7.5
46
5.5
N4280
P29-208119
55
40
10
11
7.5
51
5.5
N4280
P29-208120
60
40
12
13
10
54
6
N4280
P29-208121
60
45
10
11
7.5
56
5.5
N4280
P29-208122
65
50
10
11
7.5
61
5.5
N4280
P29-208123
70
50
12
13
10
64
6
N4280
P29-208124
70
55
12
13
7.5
66
5.5
N4280
P29-208125
80
60
12
13
10
74
6
N4280
P29-208126
80
65
12
13
7.5
76
5.5
N4280
P29-208127
85
70
12
13
7.5
81
5.5
N4280
P29-208128
90
75
12
13
7.5
86
5.5
N4280
P29-208129
95
75
12
13
10
89
6
N4280
P29-208130
100
80
15
16
10
94
6
N4280
P29-208131
100
85
12
13
7.5
96
5.5
N4280
P29-208132
105
85
15
16
10
99
6
N4280
P29-208133
105
90
12
13
7.5
101
5.5
N4280
P29-208134
110
85
15
16
12.5
103
6.5
N4280
P29-208135
110
90
15
16
10
104
6
N4280
P29-208136
115
90
15
16
12.5
108
6.5
N4280
P29-208137
120
95
15
16
12.5
113
6.5
N4280
P29-208138
120
100
15
16
10
114
6
N4280
P29-208139
125
100
15
16
12.5
118
6.5
N4280
P29-208140
125
105
15
16
10
119
6
N4280
P29-208141
140
115
15
16
12.5
133
6.5
N4280
P29-208142
160
135
18
19
12.5
153
6.5
N4280
P29-208143
32
20
10
11
6
28
4.5
F9193
P29-208148
35
22
10
11
6.5
31
5
F9193
P29-208149
38
25
10
11
6.5
34
5
F9193
P29-208150
40
25
10
11
7.5
36
5.5
F9193
P29-208151
42
22
10
11
10
36
6
F9193
P29-208152
45
30
10
11
7.5
41
5.5
F9193
P29-208153
50
30
12
13
10
44
6
F9193
P29-208154
50
35
10
11
7.5
46
5.5
F9193
P29-208155
55
40
10
11
7.5
51
5.5
F9193
P29-208156
60
40
12
13
10
54
6
F9193
P29-208157
60
45
10
11
7.5
56
5.5
F9193
P29-208158
65
50
10
11
7.5
61
5.5
F9193
P29-208159
70
50
12
13
10
64
6
F9193
P29-208160
70
55
12
13
7.5
66
5.5
F9193
P29-208161
80
60
12
13
10
74
6
F9193
P29-208162
80
65
12
13
7.5
76
5.5
F9193
P29-208163
85
70
12
13
7.5
81
5.5
F9193
P29-208164
90
75
12
13
7.5
86
5.5
F9193
P29-208165
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