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

k501

K501 is a two piece double acting piston seal consisting of a thermoplastic sealing element and one energizer elastomer ring.

ADVANTAGES
• Excellent sealing performance under static and dynamic applications
• Simple groove design
• Easy fit without installation tool
• Superior sealing performance at high and variable pressure levels
• Longer service life due to high abrasion resistance
• Excellent sealing at high surface roughness
• Outstanding resistance to pressure shocks

APPLICATION
Heavy duty cylinders and construction machinery.

INSTALLATION
Easy installation into one-piece piston head. Sealing elements must be pre-lubed with system oil before installation.

 

MATERIAL   CODE
NBR 70 SHORE A NB7001
PA   PA9904

OPERATING CONDITIONS

MEDIA

Mineral Oils
(DIN 51524)

HFA and
HFB

HFC

TEMPERATURE

-30°C
+105°C

+5°C
+60°C

-20°C
+50°C

PRESSURE

≤500 bar

≤500 bar

≤500 bar

SPEED

≤1 m/s

≤1 m/s

≤1 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

≤4 μm

Groove Base Ød

≤1.6 μm

≤6.3 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)

4.2

0.35

6.3

0.50

8.1

0.60

Note:All the above mentioned “S” values are maximum and it’s vital to use lower values for system security.

 

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

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