K38 - Intramark

K38 is a single acting rod seal with symetrical lips and an additional sealing lip which improves the leakage behaviour and at the same time, prevents the entry of dirt from the wiper side.

PRODUCT ADVANTAGES

Superior sealing effect with the secondary lipLow axial housing heights
Secondary sealing lip provides extra protection against theingress of dirt particles
Easy assembly into closed grooves
Good sealing performance even at low pressures
Wide range of dimensions

APPLICATION

Construction machinery, fork-lift trucks, injection
mouldingmachines, Agricultural machinery, mobile
hydraulics, standardcylinders, loading platforms and
telescopic cylinders.

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. Before installation the sealing element must be oiled with system oil.

NOTES

K35 type of rod seal can be also used with double lip wipers. For special applications that require high temperatures or resistance to chemicals, piston seal is being manufactured with special mixture PTFE and FKM material. For heavy duty applications and high pressures the tolerances should change to H8/f8 and please contact the customer service to choose the suitable sealing element. The permissible sealing gap values of K35 rod seal is given in the below table.

Material	Code
PU 94 SHORE A	PU9401

Surface roughness	Ra	Rmax
Sliding Surface Ød	≤0.4 μm	≤3.2 μm
Groove Base ØD	≤1.6 μm	≤10 μm
Groove Flanks	≤3.2 μm	≤16 μm

Permissible sealing gap

		Smax (mm)
t=(D-d)/2 (mm)	150 bar	250 bar	400 bar
t≤5	0.30	0.20	0.15
t>5	0.35	0.25	0.20

OPERATING CONTITIONS

Media	Mineral oils (DIN 51524)	HFA HFB	HFC
Temperature	-30 °C +100 °C	+5 °C +50 °C	-30 °C +40 °C
Pressure	≤400 bar	≤400 bar	≤400 bar
Speed	≤0.5 m/sec	≤0.5 m/sec	≤0.5 m/sec