DESCRIPTION
The Rod U-Seal set R16 has an asymmetric profile with a shortened inner lip and fabric reinforcement on the contact surface. This type of seal has great advantages over other rubber and plastic seals, such as low friction due to fabric reinforcement and the ability of its manufacturing for a wide range of operating temperatures. It has protection against extrusion with back-up ring and easy instalation in closed groove.
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APPLICATION
Iron and steel engineering
Special hydraulic cylinders.
Presses
Steel hydraulics
Scrap cutters
Injection molding machines
Industrial wehicles
Mobile hydraulics
Standard material | ||||
---|---|---|---|---|
Material Set Code | SN218 | SF266 | ||
Material base | NBR 80 Shore A | FPM 80 Shore A | ||
Fabric | Cotton | Cotton | ||
Back-up ring | Acetal resine (POM) | PTFE compound |
Advantages of the material:
For very low temperature applications up to -60 C, or excellent medium-rubber compatybility in special applications a few materials are recommended and available on request
Pressure, Speed | |
---|---|
Working pressure, p | 40 Mpa |
Running speed v | 0,5 m/s |
Medium, Working Temperature | ||
---|---|---|
Material Set Code | SN218 | SF266 |
Hydraulic oils: HL, HLP | -30.. +100 ˚C | -15.. +150 ˚C |
HFA, HFB fluids | +5..+60 °C | – |
HFC fluids | -30..+60 °C | – |
HFD fluids | – | -15.. +150 ˚C |
Water | +5..+100 °C | – |
Mineral greases | -30..+100°C | -15.. +150 ˚C |
Max. permissible gap dimension, emax | |||
---|---|---|---|
Max pressure |
ØD ≤ 80 | ØD > 80 | |
16 Mpa | 0,60 | 0,65 | |
26 Mpa | 0,50 | 0,55 | |
32 Mpa | 0,45 | 0,45 | |
40 Mpa | 0,35 | 0,40 |
Surface quality* | ||
---|---|---|
Surface roughness | Ra | Rmax |
Sliding surfaces, a | 0,05 .. 0,3μm | ≤ 2,5 μm |
Groove base, b | ≤ 1,6 μm | ≤ 6,3 μm |
Groove flanks, d | ≤ 3,0 μm | ≤ 15 μm |
*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0%