Piston Seal KN 21
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Piston Seal KN 21
Description
Product group: Piston seal
Design: N symmetrical u-ring (21)
Profile no.: 21
Specification: E suitable for one-sided pressure load
Seal material: NBR 90 3006
Operational application limits
Pressure (MPa): ≤ 16
Temperature (°C): -30 to +100
Running speed (m/s): ≤ 0.5
Catalog Piston Seal KN 21 Download View Installation Download View Design Housing Download View
Media
Hydraulic oils acc. to DIN 51524 Part 1 – 3, lubricating oils, mineral oil based lubricating greases, highly non-flammable hydraulic fluids HFA, HFB, HFC acc. to VDMA 24317
Function
The KN 21 u-ring has a symmetrical design which allows it to be used as a piston seal and as a rod seal. Apart from its application in hydraulics, this design can also be used for pneumatic applications.
Installation
The KN 21 can be installed in cut grooves starting from an inner diameter of 25 mm with the use of suitable installation tools with smaller diameters or larger profile widths, we recommend axially accessible installation housings.
Remarks
U-rings made of NBR are particularly suitable for use at low pressures. The standard KN 21 design is provided with 90 Sh-A hardness. For special applications, we can offer different materials and hardness levels.
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