
DESCRIPTION
Piston Seal Set P21 is duoble acting seal for medium duty application and housing according to ISO 7425-1. It is consisting of Polyurethane profile ring and an O-ring as energising element.
Features of this seal are very high static and dynamic sealing effect, high resistance against abrasion and low friction without the apperiance of stick-slip.
APPLICATION
Standard cylinders
Cranes
Machine tools
Injection molding machines
Handling machinery
Industrial vehicles
Agricultural machinery
Standard material | |
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Material Set Code | SN211 |
O-ring NBR 70 ShA, Code | N7020 |
Polyurethane, Code | U5012 |
Pressure, Speed | |
---|---|
Working pressure, p in Mpa | 25 |
Running speed, v in m/s | 0,5 m/s |
Media, Operating temperature | |
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Material Set Code | SN211 |
Hydraulic oils: HL, HLP | -30.. +100 ˚C |
HFA, HFB fluids | +5..+ 50 °C |
HFC fluids | -30..+40 °C |
HFD fluids | – |
Water | +5..+50 °C |
Mineral greases | -30.. +100 ˚C |
Max. permissible gap dimension, emax | |||
---|---|---|---|
Working temp. | Profil, S | Max operating pressure | |
(°C) | (mm) | 16MPa | 25MPa |
60 | ≤ 10,5 | 0,50 | 0,35 |
80 | ≤ 10,5 | 0,40 | 0,25 |
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%
ØD
Ød
H
L