Rod U-ring

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Technical data

U-RingProfileMaterialHardnessBarsTemperatureSpeed
RodCollarín VástagoNBR90 SH A≤150 -30 to +105 ºC≤0,50 m/s

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Rod U-rings

Rod U-rings have a lower inner lip than the outer lip and are generally used in single-acting applications. This model has a design specially adapted for heavy working conditions and a great performance in static applications.

ADVANTAGES

  • Superior sealing capacity in static applications
  • Easy installation in closed grooves
  • Good performance in eavy working conditions
  • Very good static tightness due to its geometry
  • Resistant up to 250 bar pressure with a back-up ring

APPLICATION

Construction machinery, forklift trucks and standard cylinders.

WORKING CONDITIONS

NBR90

FLUIDO 

Mineral oils (DIN 51524)

HFA & HFB 

HFC 

TEMPERATURE 

-30 °C to +105 °C 

+5 °C to +60 °C 

-30 °C to + 60°C 

PRESSURE 

≤150 Bar 

≤150 Bar 

≤150 Bar 

SPEED 

≤0,5 m/sn 

≤0,5 m/sn 

≤0,5 m/sn 

ROUGHNESS SURFACE

  

Ra 

Rmax 

Dynamic surface

≤0,4 μm 

≤3,2 μm 

Groove base

≤1,8 μm 

≤10,0 μm 

Groove flanks

≤3,0 μm 

≤16,0 μm 

INSTALLATION

Easily assembled into closed grooves according to the minimum diameter values that are given in the below table. Open grooves or special assembly tools should be used for the values that are outside this table. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the wiper must be oiled with system oil.

Maximum permissible gap NBR

C/S 

Pressure (Bar)

50 

100 

160 

≤5 

0.40 

0.20 

0.10 

>5 

0.45 

0.25 

0.15 

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