Hydraulic and Pneumatic Seals...since 1975
VNI 90 is a single acting rod seal designed to have inner lip shorter than the outer lip
PRODUCT ADVANTAGES
APPLICATION:
Pneumatic cylinders.
INSTALLATION:
Easy to assemble in a closed groove, depending on the minimum diameter values indicated in the table below. If the diameter values outside this table, we recommend an open groove. If'm assembly tools are used the mounting area should not have any sharp edges. Before mounting the VNI 90 must be lubricated with oil system
| 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 |
Note: the permissible sealing gap values of VNI 90 rod seal is given in the below table.
| PERMISSIBLE SEALING GAP Smax (mm) | |
| t=(D-d)/2 | 20 Bar |
| t≤50 | 0.30 |
| t>50 | 0.35 |
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.
| MATERIAL: PU 90 SH |
| OPERATING CONDITIONS | |
| MEDIA | Prepared , dried and de-oiled compressed air |
| TEMPERATURE | -30°C +90°C |
| PRESSURE | ≤20 Bar |
| SPEED | ≤1.0 m/sn |
Note: The above data are maximum values and cannot be used at the same time.
| SURFACE ROUGHNESS | Ra | Rmax |
| Sliding Surface ØD-Ød | ≤0.4 μm | ≤3.2 μm |
| Groove Base ØDb-Ødp | ≤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.
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CB = Custom build (price on request)
* = Stock item
Stock = 0 (and not a Stock* or CB product) -> minimum item value € 20.00
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