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.
| MATERIAL | CODE | |
| PU | 92 SHOREA | PU9201 |
| 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/sec | ≤0.5 m/sec | ≤0.5 m/sec |
| 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 |
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 NO | d(f8) | D(H11) | B(-0/+0.2) | b | r | n |
| 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 |
| K29-045 PU | 45 | 60.5 | 6.3 | 6 | 0.2 | 6 |
| K29-050 PU | 50 | 65.5 | 6.3 | 6 | 0.2 | 6 |
| K29-055 PU | 55 | 70.5 | 6.3 | 6 | 0.2 | 6 |
| K29-060 PU | 60 | 75.5 | 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 |
| K29-075 PU | 75 | 90.5 | 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 | 6 | 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 |