ROTARY (DOUBLE ACTION RODSEAL PTFE BRONZE)

product

ROTORY rod seal is a two piece double-acting sealing set which consists of one special mixture PTFE profile ring and an O-ring as energizing element.

PRODUCT ADVANTAGES

  • Able to use at high pressures and low peripheral speeds
  • Low friction , free of stick-slip
  • Simple groove design and low axial housing heights
  • Long service life
  • High sliding speed
  • Wide range of temperature and chemicals depending on the o-ring material
  • Minimum static and dynamic friction coeficient for a minimum energy loss and operating temperature

APPLICATION
Mobile hydraulics , grippers and rotary joints.

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, or chemical resistance, the ROTORY is manufactured from a special blend of PTFE and FPM material of the o-ring. The permissible values of the slit gala ROTORY are indicated in the table below

PERMISSIBLE SEALING GAP PTFE  Smax(mm)
B (mm) 150 Bar 250 Bar 300 Bar
2.2 0.15 0.10 0.075
3.2 0.20 0.15 0.10
4.2 0.20 0.15 0.10
6.3 0.30 0.20 0.15
8.1 0.30 0.20 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: PTFE / NBR 70 SH

 

OPERATING CONDITIONS
MEDIA Mineral oils(DIN 51524)  HFA and HFB HFC
TEMPERATURE -30°C +105°C +5°C +50°C -30°C +40°C
PRESSURE ≤300 Bar ≤300 Bar ≤300 Bar
SPEED  
≤5.0 m/sn ≤5.0 m/sn ≤5.0 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 ≤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/rotary-rod ROTARY ROD ROTARY (DOUBLE ACTION RODSEAL PTFE BRONZE) ROD/AXLE PTFE-NBR 300 -30°C +105°C 5.0
PTFE-FPM 300 -20°C +170°C 5.0
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