Piston U-Ring Set P31

DESCRIPTION
Single-acting Piston U-Ring P31 for standardised housings according to ISO5597 has asymmetrical profile and shortened outer lip, High extrusion resistance thanks to integrated back-up ring and pressure-relieving grooves

Piston U-Ring P31 can be installed in “back-to-back” position in double-acting piston design with pressure on both sides.

APPLICATION
Heavy duty Earth moving equipment
Standard hydraulic cylinders.
Truck tail lift
Presses
Stabilizer cylinders
Agriculture equipment
Construction machinery

MATERIAL

Standard material
Material set code SU512
U-cup Material Polyurethane 94 ShA
Back-up ring Acetal resine (POM)

 

The U5002 material has high mechanical properties, high wear, high abrasion and media resistance

OPERATING CONDITIONS

Pressure, Speed
Working pressure, P 40 Mpa
Running speed, v 0,5 m/s
Medium; Working Temperature
Material set code SU512
Hydraulic oils HL, HLP -30 … +110 °C
HFA, HFB fluids +5 … +60 oC
HFC fluids -30 … +40 °C
Water +5 … +50 oC
Mineral greases -30 … +110 °C

DESIGN RECOMMENDATION

Max. permissible gap dimension, emax
Max operating pressure S=7,5mm S>7,5mm
16 Mpa 0,80 1,00
26 Mpa 0,70 0,90
32 Mpa 0,50 0,65
40 Mpa 0,40 0,55
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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L
S
Material
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Material
Order code
Quantity
Sing in
40
25
9.3
9.5
7.5
35
4
SU512
P31-212001
45
30
9.3
9.5
7.5
40
4
SU512
P31-212002
50
35
9.3
9.5
7.5
45
4
SU512
P31-212003
55
40
9.3
9.5
7.5
50
4
SU512
P31-212004
60
45
9.3
9.5
7.5
55
4
SU512
P31-212005
63
48
9.3
9.5
7.5
58
4
SU512
P31-212006
65
50
9.3
9.5
7.5
60
4
SU512
P31-212007
70
50
12.2
12.5
10
64
5
SU512
P31-212008
70
55
9.3
9.5
7.5
64
4
SU512
P31-212009
75
55
12.2
12.5
10
69.0
5
SU512
P31-212010
60
12.2
12.5
10
74
5
SU512
P31-212011
80
80
9.3
9.5
7.5
75
4
SU512
P31-212012
85
70
9.3
9.5
7.5
80
4
SU512
P31-212013
90
70
12.2
12.5
10
84
5
SU512
P31-212014
90
75
9.3
9.5
7.5
85
4
SU512
P31-212015
100
80
12.2
12.5
10
94
5
SU512
P31-212016
100
85
9.3
9.5
7.5
95
4
SU512
P31-212017
105
85
12.2
12.5
10
99
5
SU512
P31-212018
110
90
12.2
12.5
10
104
5
SU512
P31-212019
115
95
12.2
12.5
10
109.0
5
SU512
P31-212020
125
100
15.2
16
12.5
117
6.5
SU512
P31-212022
125
105
12.2
12.5
10
119
5
SU512
P31-212023
130
110
12.2
12.5
10
124.0
5
SU512
P31-212024
140
115
15.2
16
12.5
132
6.5
SU512
P31-212025
140
120
12.2
12.5
10
134
5
SU512
P31-212026
150
130
12.2
12.5
10
144
5
SU512
P31-212027
160
135
15.2
16
12.5
152
6.5
SU512
P31-212028
160
140
12.2
12.5
10
154
5
SU512
P31-212029
180
160
12.2
12.5
10
174
5
SU512
P31-212030