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EDWR (PISTON WEARRING 506)_

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EDWR 506 is a piston guide ring designed to be used in heavy dutyhydraulic systems.

PRODUCT ADVANTAGES

  • Low friction coefficient
  • Superior load cushioning effect
  • Better dimension stability at elevated temperatures
  • Easy installation
  • Wide range of dimensions
  • Safely usage in heavy and medium duty applications

APPLICATION:

Mobile hydraulics ,  mining industry , excavators , hydraulic presses , heavy duty cylinders

INSTALLATION:

EDWR 506 is easily assembled into the housing by hand. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the guide ring must be oiled with system oil.

ATTENTION: The guidance must be placed where it is in direct contact with the media. EDWR is not suitable for dry working conditions. Surface contact pressure value would decrease due to temperature rise.

 

MATERIAL: POLYESTER RESIN + PTFE

OPERATING CONDITIONS
MEDIA Mineral oils (DIN 51524)  HFA and HFB HFC
TEMPERATURE -40°C +130°C +5°C +60°C -40°C +40°C
CONTACT DYNAMIC PRESSURE ≤120 N/mm2 ≤120 N/mm2 ≤120 N/mm2
CONTACT STATIC PRESSURE ≤320 N/mm2 ≤320 N/mm2 ≤320 N/mm2
SPEED ≤0.8 m/s ≤0.8 m/s ≤0.8 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 ≤14 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)
guide-rings/edwr-506 EDWR 506 EDWR (PISTON WEARRING 506)_ PISTON POM FILLED 10% PTFE/SILICONE -40°C +115 °C 1.0
POM FILLED 20% GLASS FIBER -30°C +125°C 1.0
POM FILLED 40% GLASS FIBER -30°C +140 °C 1.0
PTFE-BRONZE -50°C +200 °C 5.0
WEARTECH 506 COTTON FABRIC PNENOLIC COMPOSITES -40°C +130 °C 1.0
WEARTECH 508 FIBRE POLYESTER COMPOSITE + PTFE -40°C +120°C 1.0
WEARTECH 510 ARAMID FABRIC PNENOLIC COMPOSITE + CRAPHITE -40°C +200°C 1.0
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