Code Description d(f8) D(H8) B(-0/+0.2) n

K39

K39 is a single acting rod seal which consists of reinforced cotton fabric and nitrile rubber vulcanized together forming an integral sealing element.

PRODUCT ADVANTAGES
•Functions evenwith poor surfaces
•Reinforced cotton fabric base prevents the seal from extrusion
•Good sealing at low pressures

APPLICATION
Mobile hydraulics and Standard cylinders

INSTALLATION
K39 is to be assembled into open grooves if rod diameter is less than 40 mm. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing elements must be oiled with system oil.

 

MATERIAL   CODICE
NBR 80 SHORE A NB8801
COTTON FABRIC NBR   FB8001

OPERATING CONDITIONS

MEDIA

Mineral Oils
(DIN 51524)

HFA and
HFB

HFC

TEMPERATURE

-30°C
+105°C

+5°C
+60°C

-30°C
+60°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.

SURFACE ROUGHNESS

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

PRESSURE S max (mm)
150 0.2
250 0.1

Note: The largest sealing gap value occuring 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.

attachments:
63.22 KB