Rod U-Ring Set R16


The Rod U-Seal set R16 has an asymmetric profile with a shortened inner lip and fabric reinforcement on the contact surface.
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Iron and steel engineering
Special hydraulic cylinders.
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%