TESCO OMK-S

product

TESCO OMK-S is a two piecedouble acting piston seal which consists of one energizing elastomer ring and special mixture thermoplastic ring.

PRODUCT ADVANTAGES

  • Low firction , free stick-slip
  • Excellent performance in large diameter cylinders and heavy duty applications
  • Long service life
  • High sliding speed
  • Wide range of temperature and chemicals depending on the ring material
  • Minimum static and dynamic friction coefficient for a minimum energy loss
  • Simple groove design and low axial housing heights
  • No twisting in the housing

APPLICATION
Steel industry , injection moulding machines , presses , large diameter cylinders , steel industry

INSTALLATION
We recommend using special assembly tool (See section; Hydraulic Sealing Elements General Installation Information). It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing element must be oiled with system oil

NOTES
For special applications that require high temperatures , rod seal is manufactured in FKM and PTFE material. .

PERMISSIBLE SEALING GAP
B (mm)  Smax (mm)
X 150 Bar 250 Bar 400 Bar
10 0,60 0,50 0,40
12,5 0,65 0,55 0,45
15 0,70 0,60 0,50
17,5 0,75 0,65 0,55
20 0,80 0,70 0,60

Note: All the above mentioned "S" values are maximum and it's vital to use lower values for system security.

MATERIAL PTFE BRONZE + NBR 80SH

 

OPERATING CONDITIONS
MEDIA Mineral oils (DIN 51524) 
TEMPERATURE -30°C +105°C
PRESSURE ≤400 Bar
SPEED ≤5.0 m/sn

Note: The above data are maximum values and cannot be used at the same time. For HFA HFB HFC used applications , special filled PTFE materials are recommended. Resistance in low temperature and high temperature applications can be improved by alternate elastomer compounds.

SURFACE ROUGHNESS Ra Rmax
Sliding Surface ØD ≤0.2 μm ≤2.0μm
Groove Base Ød ≤1.6 μm ≤6.3μm
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/tesco TESCO TESCO OMK-S PISTON PTFE/BRONZE NBR 600 -30°C +105°C 5.0
PTFE/BRONZE FPM 600 -20°C +200°C 5.0
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