Type 0020 is a single acting rod seal designed to have inner lip shorterthan the outer lip in order to be used for rod applications.
Application
Construction machinery , fork-lift trucks , injection mouldingmachines , agricultural machinery , loading platforms and standardcylinders.
Technical information
Superior static and dynamic sealing effect
Wide range of dimensions
Easy assembly into closed grooves
Simple groove design
Economical sealing solution
operation principle
Easily assembled into closed grooves according to the minimum diameter values that are given in the below table. Open grooves or special assembly tools should be used for the values that are outside this table. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the rod seal must be oiled with system oil.
Options
For special applications that require high temperatures , type 0020 can be produced in FKM material.
Tables
OPERATING CONDITIONS
MEDIA
Mineral oils(DIN 51524)
HFA and HFB
HFC
TEMPERATURE
from -30°C till +100°C
from +5°C till +50°C
from -30°C till +40°C
PRESSURE
max. 400 Bar
max. 400 Bar
max. 400 Bar
SPEED
max. 0.5 m/s
max. 0.5 m/s
max. 0.5 m/s
Note: The above data are maximum values and cannot be used at the same time.
SURFACE ROUGHNESS
Ra
Rmax
Sliding Surface
max. 0.4 µm
max. 3.2 µm
Groove Base
max. 1.6 µm
max. 10 µm
Groove Flanks
max. 3.2 µm
max. 16 µm
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
MINUMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES
(D-d)/2 (mm)
4
5
6
7.7
10
12.5
15
dmin (mm)
25
30
40
50
80
100
105
PERMISSIBLE SEALING GAP
PU
Smax (mm)
t=(D-d)/2(mm)
150 Bar
250 Bar
400 Bar
t less/equal to 5
0.30
0.20
0.15
t above 5
0.35
0.25
0.20
Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers.
