Code Description D(H11) d(h11) B(+0.2) ds (h8) d1(±0.1) S(-0/+0.2) n

K42

K42 is a five piece double acting compact seal which consists of one multiple lipped elastomeric nitrile rubber sealing element , two polyester elastomer back-up rings on both sides to prevent extrusion into the sealing gap and two special profiled thermoplastic guide rings to absorb transverse forces.

PRODUCT ADVANTAGES
• Effective sealing during vibration and shock loading
• Superior sealing efeect in high pressures
• Maximum sealing effciency with the least amount of friction
• Superior sealing performance

APPLICATION
Heavy duty cylinders , excavators , cranes , marine hydraulics and loading platforms.

 

INSTALLATION
K42 compact seal must be used in open housing due to the non split form of the back-up ring produced from TPE material. If it is necessary to have a closed groove , back-up rings should be cut with 45° angle in a way not to have any gap and installed afterwards. On this case after the assembly onto the piston the cut on the back-up ring should be checked carefully. 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 80 SHORE A NB8001
TPE
  TP5501
POM   PM9903

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

≤700 bar

≤700 bar

≤700 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

≤4.0 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.

 

NOTES
For special applications that require high temperatures , piston seal is manufactured in FKM and PTFE material.

attachments:
85.34 KB