K 18 is a five piece double acting compact seal which consists of one elastomeric nitrile rubber sealing element, two polyester elastomer back-up rings on both sides to prevent extrusion into the sealing gap and two special profiled guide rings produced from thermoplastic to absorb transverse forces.

PRODUCT ADVANTAGES

  • •Superior sealing performance

  • Economic sealing and guiding solution

  • Simple groove design , one-piece piston possible

  • Long service life

  • Simple snap installation

APPLICATION

Construction machinery, fork-lift trucks, injection moulding machines, agricultural machinery, cranes and standard cylinders.

INSTALLATION

Easily assembled into one-piece piston because the back-up rings and guide rings are been produced in split forms. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing element must be oiled with system oil.

NOTES

For special applications that require high temperatures, piston seal is manufactured in FKM and PTFE material.

MaterialCode
NBR 80 SHORE ANBR8001
TPETP7301
POMPM9901
Surface roughnessRaRmax
Sliding Surface Ød≤0.4 μm≤4 μm
Groove Base ØD≤1.6 μm≤6.3 μm
Groove Flanks≤3.2 μm≤16 μm

OPERATING CONTITIONS

MediaMineral oils (DIN 51524)HFA HFBHFC
Temperature-30 °C
+105 °C		+5 °C
+60 °C		-30 °C
+60 °C
Pressure≤400 bar≤400 bar≤400 bar
Speed≤0.5 m/sec≤0.5 m/sec≤0.5 m/sec

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