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K29

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  • K29
K29 - Buffer Seal
  • General Features
  • Technicial Specifications
   KASTAŞ NOd (f8)D(H11)B(-0/+0,2)brn
 K29-032 PU3242,74,23,90,25
 K29-035 PU3545,74,23,90,25
 K29-036 PU3646.74.23.90.25
 K29-038 PU3848,74,23,90,25
 K29-040 PU4055,56,360,26
 K29-040/1 PU4050,74,23,90,25
 K29-045 PU4560,56,360,26
 K29-045/1 PU4555,74,23,90,25
 K29-048 PU4863,56,360,26
 K29-050 PU5065,56,360,26
 K29-050/1 PU5060,74,23,90,25
 K29-055 PU5570,56,360,26
 K29-055/1 PU5570,16,360,26
 K29-056 PU5671.16.360.26
 K29-056/1 PU5671,56,360,26
 K29-060 PU6075,56,360,26
 K29-060/1 PU6075,16,360,26
 K29-063 PU6378,56,360,26
 K29-065 PU6580,56,360,26
 K29-070 PU7085,56,360,26
 K29-070/1 PU7085,16,360,26
 K29-075 PU7590,56,360,26
 K29-075/1 PU7590,16,360,26
 K29-078 PU7893,16,360,26
 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 PU120135,56,35.80,26
 K29-125 PU125140,56,360,26
 K29-130 PU130145,56,360,26
 K29-140 PU140155,56,360,26
 K29-150 PU150165,56,360,26

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

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

APPLICATION
Construction machinery , fork-lift trucks , injection mouldingmachines , agricultural machinery , cranes , earth movingequipment and standard cylinders.

MATERIAL x CODE
PU 92 SHORE A PU9201
POM   PM9901
OPERATING CONDITIONS
MEDIA Mineral oils(DIN 51524)  HFA ve HFB HFC
TEMPERATURE -40°C +100°C +5°C +50°C -30°C +40°C
PRESSURE ≤400 Bar ≤400 Bar ≤400 Bar
SPEED ≤0.5 m/sn ≤0.5m/sn ≤0.5 m/sn
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 ≤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.

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 combinationwith u-ring (K22 , K33 , etc) as they are not designed as being themain sealing element. K29 reduces the pressure peaks on itself inorder to save the main sealing element with pressure fluctuations.


PERMISSIBLE SEALING GAP
B (mm)  Smax (mm)
x   150 Bar  250 Bar  400 Bar
≤ 6.3 0.6 0.5  0.4
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.
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