Hydraulic and Pneumatic Seals...since 1975
DWR ptfe bronze is a rod-piston guide ring designed to be used in medium duty hydraulic and pneumatic systems.
PRODUCT ADVANTAGES
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 |
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| 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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CB = Custom build (price on request)
* = Stock item
Stock = 0 (and not a Stock* or CB product) -> minimum item value € 20.00
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