NA (U-RING SINGLE ACTION PISTONSEAL PNEUMATIC)

product

NA  is a single acting pistonseal designed to have lower outside 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:

Easily assembled into closed grooves according to the minimum diameter values that are given in the below table. 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 wiper must be oiled with system oil.

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, NA  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 NA  pistonseal is given in the below table

PERMISSIBLE SEALING GAP   Smax(mm)
t=(D-d)/2 12 Bar
t≤50 0.40
t>50 0.45

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 PNEUMATIC

 

OPERATING CONDITIONS 
MEDIA Prepared , Conditioned dry compressed air
TEMPERATURE -30°C +105°C
PRESSURE ≤12 Bar
SPEED ≤0.5 m/s

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/na-pneumatic NA PNEUMATIC NA (U-RING SINGLE ACTION PISTONSEAL PNEUMATIC) PISTON NBR 12 -30°C +105°C 1.0
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