Skip to content

KASTAS K29 BUFFER SEAL

    KASTAS BUFFER SEALS K29

    K29 is a two piece single acting buffer seal which consists of one special designed elastomeric sealing element to evacuate the back pressure and one thermoplastic back-up ring.

    PRODUCT ADVANTAGES
    • No pressure build up between the primary and secondary seal
    • Highly wear resistant
    • Low friction
    • Low axial housing heights
    • Good protection to the secondary seal with pressure peaks

    APPLICATION
    Construction machinery, fork-lift trucks, injection moulding
    machines, agricultural machinery, cranes, earth moving
    equipment and standard cylinders.

    MATERIALCODE
    PU92 SHOREAPU9201
    POMPM9901
    OPERATING CONDITIONS
    MEDIAMineral oils
    (DIN 51524)
    HFA and HFBHFC
    TEMPERATURE-30°C
    +100°C
    +5°C
    +50°C
    -30°C
    +40°C
    PRESSURE≤400 Bar≤400 Bar≤400 Bar
    SPEED≤0.5 m/sec≤0.5 m/sec≤0.5 m/sec
    SURFACE ROUGHNESSRaRmax
    Sliding SurfaceØd≤0.4 μm≤3.2 μm
    Groove BaseØD≤1.6 μm≤6.3 μm
    Groove FlanksB≤3.2 μm≤16 μm

    INSTALLATION
    Easily assembled into closed grooves. 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
    K29 buffer seal is always used in a sealing system in combination with u-ring (K22, K33, etc) as they are not designed as being the main sealing element K29 reduces the pressure peaks on itself in order to save the main sealing element with pressure fluctuations. The permissible sealing gap values of K29 seal is given below.

    KASTAŞ NOd(f8)D(H11)B(-0/+0.2)brn
    K29-038 PU3848.74.23.90.25
    K29-040 PU4055.56.360.26
    K29-045 PU4560.56.360.26
    K29-050 PU5065.56.360.26
    K29-055 PU5570.56.360.26
    K29-060 PU6075.56.360.26
    K29-065 PU6580.56.360.26
    K29-070 PU7085.56.360.26
    K29-075 PU7590.56.360.26
    K29-080 PU8095.56.360.26
    K29-085 PU85100.56.360.26
    K29-090 PU90105.56.360.26
    K29-095 PU95110.56.360.26
    K29-100 PU100115.56.360.26
    K29-105 PU105120.56.360.26
    K29-110 PU110125.56.360.26
    K29-115 PU115130.56.360.26
    K29-120 PU120135.56.360.26
    K29-125 PU125140.56.360.26
    K29-130 PU130145.56.360.26
    K29-140 PU140155.56.360.26
    K29-150 PU150165.56.360.26