K40

K40 - Piston Seal
   KASTAŞ NO D (H8) d (h11) B (-0/+0,2) d1 min. n
 K40-014 PU 14 8 6 10 2
 K40-036 PU 36 27 6 32 3
 K40-040 PU 40 25 11 35 4
 K40-045 PU 45 30 11 40 4
 K40-045/1 PU 45 30 9,5 40 4
 K40-050 PU 50 35 11 45 4
 K40-050/1 PU 50 35 9,5 45 4
 K40-055 PU 55 40 11 50 4
 K40-055/1 PU 55 40 9,5 50 4
 K40-060 PU 60 45 11 55 4
 K40-060/1 PU 60 45 9,5 55 4
 K40-063 PU 63 48 10 58 4
 K40-063/1 PU 63 50 10 60 4
 K40-063/2 PU 63 48 9,5 58 4
 K40-065 PU 65 50 11 60 4
 K40-070 PU 70 50 13 64 5
 K40-070/2 PU 70 55 10 65 4
 K40-070/3 PU 70 50 16,5 64 5
 K40-075 PU 75 55 13 69 5
 K40-080 PU 80 60 13 74 5
 K40-080/1 PU 80 60 12,5 74 5
 K40-085 PU 85 70 9,3 79 5
 K40-090 PU 90 70 13 84 5
 K40-100 PU 100 80 13 94 5
 K40-100/1 PU 100 88 8,5 96 4
 K40-110 PU 110 90 13 104 5
 K40-120 PU 120 100 13 114 6,5
 K40-125 PU 125 100 16,2 119 6,5
 K40-140 PU 140 115 15 134 6,5
 K40-140/1 PU 140 120 12,5 134 6,5
 K40-150 PU 150 120 19 144 8
 K40-170 PU 170 150 12,5 164 6,5
 K40-180 PU 180 150 19 174 8
 K40-220 PU 220 190 17 212 8
 K40-240 PU 240 210 17 232 8

K40 is a two piece single acting piston seal which consists of asymmetrical profile with pressure relieving grooves and a thermoplastic back-up ring.

PRODUCT ADVANTAGES
• Superior static and dynamic sealing effect
• Improved sealing gap due to the active back-up ring
• Relief grooves against dynamic pressure
• Easy assembly into the closed groove
• Simple groove design
• Highly wear resistant

APPLICATION
Heavy duty cylinders , scrap cutters and hydraulic jacks.
MATERIAL   CODE
PU 92 SHORE A PU9401
POM   PM9901
OPERATING CONDITIONS
MEDIA Mineral oils(DIN 51524)  HFA and HFB HFC
TEMPERATURE -30°C +100°C +5°C +50°C -30°C +40°C
PRESSURE ≤400 Bar ≤400 Bar ≤400 Bar
SPEED ≤0.5 m/sn ≤0.5 m/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 ≤10 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 one piece piston. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation all individual parts of the seal must be oiled with system oil.

NOTESThe permissible sealing gap values of K40 piston seal is given in the below table.
 
PERMISSIBLE SEALING GAP
   Pressure (Bar) Smax (mm)
100 1.0
150 0.8
250 0.7
400 0.6
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.