VARISEAL (PISTON SPLITSEAL )

product

VARISEAL is a two piece single acting piston seal which consists of a PTFE / CARBON u-ring with RVS spring as a tension component.

PRODUCT ADVANTAGES

  • Superior static and dynamic sealing eect by the metal spring
  • High resistance to chemicals and temperature changes
  • High sliding speed
  • Long service life
  • Can be sterilized
  • Low static and dynamic friction values

APPLICATION
Hydraulic and pneumatic cylinders , hot water valves , pumps , hot steam vanes , food processing, chemical and medical technology.

INSTALLATION

The prestressed VARISEAL can only be mounted in an open groove. The assembly tools must be free of sharp edges and burrs. For imontage, the VARISEAL must be greased or oiled with system oil

NOTES
Depending on the PTFE / CARBON material application values and their resistance can change. The permissible sealing gap values of VARISEAL spring loaded piston seal is given in the below table

PERMISSIBLE SEALING GAP VARISEAL Smax (mm)
B (mm) 50 Bar 150 Bar 250 Bar 350 Bar
2.4-3.6 0.10 0.075 0.05 0.05
4.8 0.20 0.10 0.075 0.06
7.1 0.25 0.15 0.10 0.075
9.5 0.30 0.15 0.13 0.075

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: PTFE CARBON /  STAINLESS STEEL SPRING

OPERATING CONDITIONS
 MEDIA Hydraulic oils , hot air , water , steam , all media that do not react PTFE and stainless steel
TEMPERATURE -150°C +250°C
PRESSURE ≤350 Bar
SPEED  
≤15.0 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 ≤0.2 μm ≤2.0 μm
Groove Base ØDb-Ødp ≤1.6 μm ≤6.3 μm
Groove Flanks B ≤3.2 μm ≤15 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/variseal-uitw VARISEAL UITW VARISEAL (PISTON SPLITSEAL ) PISTON PTFE RVS SPRING 350 -150°C +250°C
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