(pack) Rod Sealing U-ring K22 PU ID 004mm-020mm (choose dimensions)

Description

K22 is a single acting rod seal designed to have inner lip shorterthan the outer lip in order to be used for rod applications.
PRODUCT ADVANTAGES
• Superior static and dynamic sealing effect
• Wide range of dimensions
• Easy assembly into closed grooves
• Simple groove design
• Economical sealing solution
APPLICATION
Construction machinery , fork-lift trucks , injection mouldingmachines , agricultural machinery , loading platforms and standardcylinders.
MATERIAL
CODE
NBR
90 SHORE A
NB9001
PU
92 SHORE A
PU9201
OPERATING CONDITIONS
NBR
MEDIA
Mineral oils(DIN 51524)
HFA and HFB
HFC
TEMPERATURE
-30°C +105°C
+5°C +60°C
-30°C +60°C
PRESSURE
≤150 Bar
≤150 Bar
≤150 Bar
SPEED
≤0.5 m/sn
≤0.5 m/sn
≤0.5 m/sn
PU
MEDIA
Mineral oils(DIN 51524)
HFA and HFB
HFC
TEMPERATURE
-30°C +100°C
+5°C +50°C
-30°C +40°C
PRESSURE
≤400 Bar
≤400 Bar
≤400 Bar
SPEED
≤0.5 m/sn
≤0.5 m/sn
≤0.5 m/sn
Note: The above data are maximum values and cannot be used at the same time.
SURFACE ROUGHNESS
Ra
Rmax
Sliding Surface Ød
≤0.4 μm
≤3.2 μm
Groove Base ØD
≤1.6 μm
≤10 μm
Groove Flanks B
≤3.2 μm
≤16 μm
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
INSTALLATION
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.
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
NOTES
For special applications that require high temperatures , K22 can be produced in FKM material.
PERMISSIBLE SEALING GAP
NBR
Smax (mm)
t=(D-d)/2(mm)
50 Bar
100 Bar
150 Bar
t≤5
0.40
0.20
0.10
t>5
0.45
0.25
0.15
PU
Smax (mm)
t=(D-d)/2(mm)
150 Bar
250 Bar
400 Bar
t≤5
0.30
0.20
0.15
t>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.