K35 - Intramark

K35 is a two piece single acting rod seal which consists of one special mixture PTFE profile ring and an o-ring as energizing element.

PRODUCT ADVANTAGES

Low friction, free of stick-slip
Due to the special profile it can be used in pair or in front of the u-ring
Long service life
High sliding speed
Wide range of temperature and chemicals depending on the o-ring material
Minimum static and dynamic friction coefficient for a minimum energy loss and operating temperature
Simple groove design and low axial housing heights

APPLICATION

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

INSTALLATION

We recommend using special assembly tool (See section; Hydraulic Sealing Elements General Installation Information). 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

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
NBR 70 SHORE A	NBR7001
PTFE	PT6003

Surface roughness	Ra	Rmax
Sliding Surface Ød	≤0.2 μm	≤2.0 μm
Groove Base ØD	≤1.6 μm	≤6.3 μm
Groove Flanks	≤3.2 μm	≤15 μm

Permissible sealing gap

B (mm)		Smax (mm)
	150 bar	250 bar	400 bar
2.2	0.25	0.15	0.10
3.2	0.35	0.20	0.10
4.2	0.35	0.20	0.15
6.3	0.45	0.25	0.15
8.1	0.55	0.30	0.20
8.1	0.55	0.30	0.20

OPERATING CONTITIONS

Media	Mineral oils (DIN 51524)	HFA HFB	HFC
Temperature	-30 °C +105 °C	+5 °C +60 °C	-30 °C +60 °C
Pressure	≤400 bar	≤400 bar	≤400 bar
Speed	≤5.0 m/sec	≤5.0 m/sec	≤5.0 m/sec