VNA TE-18 (SINGLE ACTION PISTON U-RING)

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VNA TE18 is a two piece single acting piston seal. This seal type is specially designed for heavy duty applications. When the coupling clearance between bore and piston cannot be reduced and the pressure is very high - above 250 bar - the PAE seal type, thanks to a strong anti-extrusion ring, is among the most appropriate of seal types.

PRODUCT ADVANTAGES:

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

APPLICATION:

Heavy duty cylinders , scrap cutters and hydraulic jacks.

INSTALLATION:

Easily mounted on a piece piston in one piece. If'm assembly tools are used the mounting area should not have any sharp edges. Before mounting the VNA TE18 must be lubricated with oil system.

PERMISSIBLE SEALING GAP   Smax(mm)
t=(D-d)/2 100 Bar 150 Bar 250 Bar 400 Bar
  1.0 0.80 0.70 0.60

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 92 SH / POM

 

OPERATING CONDITIONS 
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-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)
zuiger-afdichting/vna-te-18 VNA TE-18 VNA TE-18 (SINGLE ACTION PISTON U-RING) PISTON PU/POM 94SH KDA 500 -40°C +110 °C 0.5
PU-POM 400 -30°C +100 °C 0.5
NBR-POM 250 -30°C +100 °C 0.5
FPM-PTFE 250 -20°C +200°C 0.5
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