DWR (WEARRING POM/PTFE BRONZE)

product

DWR ptfe bronze is a rod-piston guide ring designed to be used in medium duty hydraulic and pneumatic systems.

PRODUCT ADVANTAGES

  • Easy assembly
  • Medium load bearing capacity
  • Able to work on dry conditions
  • Easy to use in all dimensions because of being strips
  • Low friction , free of stick-slip
  • Superior load cushioning effect
  • Able to absorb the small particles that is in the system

APPLICATION
Construction machinery , cranes , injection moulding machines , control and regulation equipment , chemical industry and standard cylinders


Note: The permissible sealing gap values of TB strip is indicated in the table below.

 
PERMISSIBLE SEALING GAP
Diameter (mm) S (mm)
10-25 0.25±0.05
26-100 0.30±0.05
101-300 0.40±0.10
301 -600 0.60±0.15
601-1200 0.80±0.20
> 1200 0.90±0.30

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 (Bronze filled)

OPERATING CONDITIONS
MEDIA Mineral oils
(DIN 51524)
HFA and HFB HFC
TEMPERATURE -50°C   +200°C -40°C +200°C -40°C +200°C
DYNAMIC CONTACT PRESSURE
15 N/mm2  
15 N/mm2  
15 N/mm2  
SPEED ≤5.0 m/s ≤5.0 m/s ≤15.0 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 ≤0.3 μm ≤2.5μm
Groove Base  ØDb- Ødp ≤1.6 μm ≤10μm
Groove Flanks  B ≤3.2 μm ≤12μm

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)
geleidingsringen-hen-mrt-demping-wearrings/dwr-pom-ptfe-bronze DWR (POM/PTFE BRONZE) DWR (WEARRING POM/PTFE BRONZE) STANG/ZUIGER PTFE-BRONZE -50°C +200 °C 5.0
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