K37 is a two piece single acting rod seal which consists of areinforced cotton fabric and nitrile rubber vulcanized togetherforming an integral sealing element and one thermoplasticback-up ring.

PRODUCT ADVANTAGES

  • Functions even with poor surfaces

  • Reinforced cotton fabric base prevents the seal from extrusion

  • Good sealing effect at low pressures

  • Improved sealing gap due to the active back-up ring

APPLICATION

Injection moulding machines, fork-lift trucks, loading platforms, cranes, agricultural machinery, hydraulic breakers and servo cylinders.

INSTALLATION

K37 is to be assembled into open grooves. It is very important thatthe assembly tools must be of soft material and have no sharpedges. Before installation all individual parts of the seal must beoiled with system oil.

NOTES

The permissible sealing gap values of K37 rod seal is given in the below table.

MaterialCode
NBR 80 SHORE ANBR7001
COTTON FABRIC NBRNBR8008
POMPM9901
Surface roughnessRaRmax
Sliding Surface Ød≤0.4 μm≤3.2 μm
Groove Base ØD≤1.8 μm≤6.3 μm
Groove Flanks≤3.2 μm≤16 μm

Permissible sealing gap

Pressure (Bar)Smax (mm)
1500.4
2500.3
4000.2

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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