Piston U-Ring Set P36
DESCRIPTION
Single acting Piston U-Ring Set P36 has asymmetrical profile and shortened outer lip and fabric reinforcement on the dynamic sealing side and an active back-up ring for gap closing. Piston Seal set P36 can be installed in “back-to-back” position in double-acting piston design with pressure on both sides.
Low friction due to fabric reinforcement, wide operating temperature range, easy instalation in closed groove and material FPM in black or brown color are significiant advantages of this Set.
APPLICATION
Earth moving equipment
Special hydraulic cylinders.
Truck tail lift
Presses
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 |
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 to 100˚C | -15 to +150˚C |
| HFA, HFB fluids | +5 to +60˚C | – |
| HFC fluids | -30 to +60˚C | – |
| HFD fluids | – | -15 to +150˚C |
| Water | +5 to +90˚C | – |
| Mineral greases | -30 to +90˚C | -15 to +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 | 0,40 | 0,45 |
| 40 Mpa | 0,35 | 0,40 |
| Surface quality* | ||
|---|---|---|
| Surface roughness | Ra | Rmax |
| Sliding surfaces | 0.05.. 0,3 μm | ≤ 2,5 μm |
| Groove base | ≤ 1,6 μm | ≤ 6,3 μm |
| Groove flanks | ≤ 3,0 μm | ≤ 15 μm |
*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0%