Piston Compact Seal Set P18

DESCRIPTION
Five-piece compact seal P18 is double-acting piston seal P18 is compossed of five elements: main sealing element in NBR or special material on request, two pressure ring in rubber reinforced fabric and two guide rings in acetal resines POM

Multiple sealing lips on central rubber part provides maximum sealing efficiency and energized both cotton fabric reinforced U-rings when pressure is applied. This sealing set achieves an excellent sealing effect, effective sealing even during vibration or impact loading without extrusion into the sealing gap and enables easy installation in an open groove.

APPLICATION
Applications with severe vibration, shock and high pressure
Industrial vehicles
Lift platforms
Earth moving equipment
Escavators

MATERIAL

Standard material
Material set code, standard SN218
Rubber NBR 80 Shore
Fabric reinforcement Cotton
Guide ring POM

 

For very low temperature up to -60 °C, or high temperature applications up to 200 °C, and for excellent medium-rubber compatybility in special applications a few materials are recommended and available on request

OPERATING CONDITIONS

Pressure, Speed
Working pressure Up to 70 Mpa
Running speed v Up to 0,5 m/s

Medium, Working Temperature
Material Set Code SN218
Hydraulic oils: HL, HLP -30 to 100˚C
HFA, HFB fluids +5 to +60˚C
HFC fluids -30 to +60˚C
Water +5 to +90˚C
Mineral greases -30 to +100˚C

DESIGN RECOMMENDATION

Surface quality*
Surface roughness Ra Rmax
Sliding surfaces 0.05 .. 0,3μm ≤ 2,5 μm
Groove base ≤ 1,6 μm ≤ 6,3 μm
Groove flanks ≤ 3 μm ≤ 15 μm
Chamfer ≤ 4 μm ≤ 16 μm


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

ØD
Ød
L
S
L1
Material
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ØD
Ød
L
L1
Ød2
Ød3
S
C
Material
Order code
50
34
32
6.3
43.8
47.8
8
5
SN218
P18-070005
60
44
32
6.3
53.8
57.8
8
5
SN218
P18-070006
63
47
32
6.3
56.7
60.8
8
5
SN218
P18-070007
70
50
35
9.5
62.6
67.5
10
7
SN218
P18-070008
80
60
35
9.5
72.6
77.5
10
7
SN218
P18-070009
85
65
35
9.5
77.6
82.5
10
7
SN218
P18-070010
90
70
35
9.5
82.6
88.0
10
7
SN218
P18-070011
95
75
35
9.5
87.6
92.5
10
7
SN218
P18-070012
100
80
35
9.5
92.6
97.5
10
7
SN218
P18-070013
110
90
35
9.5
102.7
107.5
10
7
SN218
P18-070014
120
100
35
9.5
112.8
117.5
10
7
SN218
P18-070015
125
100
45
12.7
116.8
122.3
12.5
10
SN218
P18-070016
130
105
45
12.7
121.8
127.3
12.5
10
SN218
P18-070017
140
115
45
12.7
131.7
137.3
12.5
10
SN218
P18-070018
150
125
45
12.7
141.7
147.3
12.5
10
SN218
P18-070019
160
135
45
12.7
151.7
157.1
12.5
10
SN218
P18-070020
180
155
45
12.7
171.6
177.1
12.5
10
SN218
P18-070022
200
175
45
12.7
191.7
197.1
12.5
10
SN218
P18-070023
220
195
45
12.7
211.6
217.1
12.5
10
SN218
P18-070024
250
225
45
12.7
241.7
247.1
12.5
10
SN218
P18-070025
280
255
45
12.7
271.7
277.1
12.5
10
SN218
P18-070026
300
275
45
12.7
291.7
297.1
12.5
10
SN218
P18-070027