VNA is a single acting seal that has been conceived to work on the piston and it can be used for simple or double effect. Its has asymmetrical lips which ensure a continuous contact with the bore, even in case of high misalignments. The installation is done in semi-open groove by overlapping, since the material has a high modulus of elasticity
Easy assembly into closed grooves. depending on the minimum diameter values indicated in the table below. Open grooves or special assembly tools should be used for values that are outside this table. If'm assembly tools are used the mounting area should not have any sharp edges. Before mounting the VNA must be lubricated with oil system.
|MINUMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES|
Note: the permissible sealing gap values of VNA piston -rod seal is given in the below table.
|PERMISSIBLE SEALING GAP Smax(mm)|
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 PNEUMATIC|
|MEDIA||Prepared , Conditioned dry compressed air|
|TEMPERATURE||-30°C + 90°C|
Note: The above data are maximum values and cannot be used at the same time.
|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.
CB = Custom build (price on request)
* = Stock item
Stock = 0 (and not a Stock* or CB product) -> minimum item value € 10.00