Code Description D(H9) d(h9) B(-0/+0.2) r n

K15

K15 is a two piece double acting sealing set which consists of a special designed polyurethane seal ring and an o-ring as energizing element.

PRODUCT ADVANTAGES
• High static and dynamic sealing effect
• Low axial housing heights
• Simple groove design , one-piece piston possible
• High abrasion resistance

APPLICATION
Light to medium duty industrial machinery, injection moulding machines, crane and hydraulic lift.

 

INSTALLATION
Easily assembled on one-piece piston. 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.

 

MATERIAL   CODE
NBR 70 SHORE A NB7001
PU 95 SHORE A PU9501

OPERATING CONDITIONS

MEDIA

Mineral Oils
(DIN 51524)

HFA and
HFB

HFC

TEMPERATURE

-30°C
+105°C

+5°C
+50°C

-30°C
+40°C

PRESSURE

≤250 bar

≤250 bar

≤250 bar

SPEED

≤0.5 m/s

≤0.5 m/s

≤0.5 m/s

Note: The above data are maximum values and cannot be used at the same time.

ROUGHNESS SURFACE

Ra

Rmax

Sliding Surface ØD

≤0.4 μm

≤3.2 μm

Groove Base Ød

≤1.6 μm

≤10 μm

Groove Flanks B

≤3.2 μm

≤16 μm

Note: It is recommended to have 50% to 90% of the working surface material contact area value .

PERMISSIBLE SEALING GAP

B (mm)

S max (mm)

3.2

0.25

4.2

0.25

6.3

0.30

8.1

0.30

Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers.

 

NOTES
It is recommended to use with two piston guide rings in long stroke cylinders , one guide ring in short stroke and under low radial loads.

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