K29

K29 - Buffer Seal
   KASTAŞ NO d (f8) D(H11) B(-0/+0,2) b r n
 K29-032 PU 32 42,7 4,2 3,9 0,2 5
 K29-035 PU 35 45,7 4,2 3,9 0,2 5
 K29-036 PU 36 46.7 4.2 3.9 0.2 5
 K29-038 PU 38 48,7 4,2 3,9 0,2 5
 K29-040 PU 40 55,5 6,3 6 0,2 6
 K29-040/1 PU 40 50,7 4,2 3,9 0,2 5
 K29-045 PU 45 60,5 6,3 6 0,2 6
 K29-045/1 PU 45 55,7 4,2 3,9 0,2 5
 K29-048 PU 48 63,5 6,3 6 0,2 6
 K29-050 PU 50 65,5 6,3 6 0,2 6
 K29-050/1 PU 50 60,7 4,2 3,9 0,2 5
 K29-055 PU 55 70,5 6,3 6 0,2 6
 K29-055/1 PU 55 70,1 6,3 6 0,2 6
 K29-056 PU 56 71.1 6.3 6 0.2 6
 K29-056/1 PU 56 71,5 6,3 6 0,2 6
 K29-060 PU 60 75,5 6,3 6 0,2 6
 K29-060/1 PU 60 75,1 6,3 6 0,2 6
 K29-063 PU 63 78,5 6,3 6 0,2 6
 K29-065 PU 65 80,5 6,3 6 0,2 6
 K29-070 PU 70 85,5 6,3 6 0,2 6
 K29-070/1 PU 70 85,1 6,3 6 0,2 6
 K29-075 PU 75 90,5 6,3 6 0,2 6
 K29-075/1 PU 75 90,1 6,3 6 0,2 6
 K29-078 PU 78 93,1 6,3 6 0,2 6
 K29-080 PU 80 95,5 6,3 6 0,2 6
 K29-085 PU 85 100,5 6,3 6 0,2 6
 K29-090 PU 90 105,5 6,3 6 0,2 6
 K29-095 PU 95 110,5 6,3 6 0,2 6
 K29-100 PU 100 115,5 6,3 6 0,2 6
 K29-105 PU 105 120,5 6,3 6 0,2 6
 K29-110 PU 110 125,5 6,3 6 0,2 6
 K29-115 PU 115 130,5 6,3 6 0,2 6
 K29-120 PU 120 135,5 6,3 5.8 0,2 6
 K29-125 PU 125 140,5 6,3 6 0,2 6
 K29-130 PU 130 145,5 6,3 6 0,2 6
 K29-140 PU 140 155,5 6,3 6 0,2 6
 K29-150 PU 150 165,5 6,3 6 0,2 6

 

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.