N 90SH (U-RING SINGLE ACTION ROD/PISTONSEAL)

product

N is a single acting piston - rod seal and designed to have symmetrical lips in order to be used both for rod and piston applications..

PRODUCT ADVANTAGES:

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

APPLICATION:

Construction machinery , fork-lift trucks , injection moulding machines , agricultural machinery , loading platforms and standard cylinders

INSTALLATION:

Easy assembly into closed grooves. depending on the minimum diameter values indicated in the table below. Open grooves or special assembly tools are required for values that is used outside of this table there vallen.Als assembly tool the mounting area should not have any sharp edges. Before mounting the N 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

NOTES: For special applications that require high temperatures, N can be produced in FPM, also with a anti extrusion ring in ptfe white for high pressure c.a. 250 bar. The permissible gap values of piston - rod seal is given in the below table

PERMISSIBLE SEALING GAP   Smax(mm)
t=(D-d)/2 50 Bar 100 Bar 150 Bar
t≤5 0.40 0.20 0.10
t>5 0.45 0.25 0.15

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: NBR 90 SH

 

OPERATING CONDITIONS 
MEDIA Mineral oils(DIN 51524)  HFA and HFB HFC
TEMPERATURE -30°C +105°C +5°C +60°C -30°C +60°C
PRESSURE ≤150 Bar ≤150 Bar ≤150 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)
stang-afdichting/n-90-inw N 90 INW N 90SH (U-RING SINGLE ACTION ROD/PISTONSEAL) ROD/AXLE NBR 90SH 150 -30°C +105°C 0.5
NBR 75SH 25 -30°C +105°C 0.5
FPM 80SH 100 -20°C +200°C 0.5
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