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VNI ROD SEAL WITH HEAVY INNER LIP TYPE XT

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VNI/ is a single acting rod seal, which is designed to ensure high resistance of extrusion and superior leakage performance in heavy duty applications

PRODUCT ADVANTAGES
• Superior static and dynamic sealing
• Increased extrusion resistance
• Long service life

APPLICATION
Construction machinery , fork-lift trucks , injection moulding machines , all hydraulic applications that need low friction force, metal working machines

MATERIAL   CODE
PU  94 SHORE A PU9401
OPERATING CONDITIONS
MEDIA Mineral oils(DIN 51524)  HFA and HFB HFC
TEMPERATURE -35°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 0.05≤..≤0.4 μm ≤3.2 μm
Groove Base ØD 0.20≤..≤1.6 μm ≤10 μm
Groove Flanks B 0.20≤..≤3.2 μm ≤16 μm
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
 

INSTALLATION
Existing table values of VNI/XT rod sealing element should be used to decide closed groove dimensions. 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.
 
PERMISSIBLE SEALING GAP
    Smax (mm)
t=(D-d)/2(mm) 150 Bar 250 Bar 400 Bar
t≤5 0.50 0.45 0.25
t>5  0.60 0.45 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.

 

# Vota code Name Application Material Pressure
(bar)		 Temperature °C Sliding Speed (m/s)
hydraulic-seals-rod-seal/vni-type-xt VNI TYPE XT VNI ROD SEAL WITH HEAVY INNER LIP TYPE XT ROD/AXLE PU 94 SH 400 -35°C +100°C 0.5
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