VNI 90SH (U-RING SINGLE ACTION RODSEAL PNEUMATIC)

product

VNI 90 is a single acting rod seal designed to have inner lip shorter than the outer lip

 PRODUCT ADVANTAGES

  • Superior static and dynamic sealing effect
  • Wide range of dimensions
  • Easy assembly into closed grooves
  • Simple groove design
  • Economical sealing solution

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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# Vota code Name Application Material Pressure
(bar)
Temperature °C Sliding Speed (m/s)
stang-afdichting/vni-90-pneum VNI 90 PNEUM VNI 90SH (U-RING SINGLE ACTION RODSEAL PNEUMATIC) ROD/AXLE PU 90SH 20 -30°C +90 °C 1.0
PU 93SH 400 -30°C +100°C 1.0
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