ZSDA PISTON SEAL
The ZSDA seal for cylinders with radial drillings is a piston seal which can dynamically operate over drillings in the cylinder bore up to 3 mm diameter. It can also be used as a high pressure seal on cylinders with-out radial drillings up to 2000 bar.
The ZSDA seal consists of 5 parts. Two L-shaped metallic support rings and an intermediate metallic thrust ring support a slide ring of PTFE compound withM narrow sealing lips on its outer diameter. An O-Ring acts as energiser to provide a sealing function even at zero pressure.
| Materials | |||
| Elastic Ring | Slide Ring | L-Ring | |
| Standard | NBR | PTFEB-Bronze | Bronze |
| Alternative (on request) | FKM, FKMHW, NBR-TT, H-NBR, EPDM | PTFE-Compounds | Stainless Steel, Aluminum |
| Application Range | |||
| Pressure [bar] | Temperature Range [°C] | Sliding Speed [m/s] | |
| Standard | 450 [2000*] | -30 … +100 | 1 |
| Design Hints Surface Finish | |||
| Surface Quality | Surface Hardness | ||
| Ra [µm] | Rt [µm] | [HRC] | |
| Sliding Surfaces | 0.1 – 0.3 | ≤ 1.5 | > 40 |
| Groove Base | 0.8 | ≤ 6.3 | |
| Groove Sides | 3.2 | ≤ 15 | |
SIZE
| D | d | b | b1 | e | Ref. Number |
| 50 | 30 | 9,5 | 10 | 7 | 11108 |
| 56 | 36 | 9,5 | 10 | 7 | 11110 |
| 63 | 43 | 9,5 | 10 | 7 | 11112 |
| 65 | 45 | 9,5 | 10 | 7 | 11113 |
| 70 | 50 | 9,5 | 10 | 7 | 11114 |
| 75 | 55 | 9,5 | 10 | 7 | 11115 |
| 80 | 60 | 9,5 | 10 | 7 | 11117 |
| 85 | 65 | 9,5 | 10 | 7 | 11118 |
| 90 | 70 | 9,5 | 10 | 7 | 11120 |
| 95 | 75 | 9,5 | 10 | 7 | 11121 |
| 100 | 80 | 9,5 | 10 | 7 | 11122 |
| 105 | 85 | 9,5 | 10 | 10 | 11123 |
| 110 | 90 | 9,5 | 10 | 10 | 11124 |
| 115 | 95 | 9,5 | 10 | 10 | 11125 |
| 120 | 100 | 9,5 | 10 | 10 | 11126 |
| 125 | 105 | 9,5 | 10 | 10 | 11127 |
| 130 | 110 | 9,5 | 10 | 10 | 11128 |
| 135 | 115 | 9,5 | 10 | 10 | 11129 |
| 140 | 120 | 9,5 | 10 | 10 | 11130 |
| 150 | 130 | 9,5 | 10 | 10 | 11132 |
| 155 | 135 | 9,5 | 10 | 10 | 11133 |
| 160 | 140 | 9,5 | 10 | 10 | 11134 |
| 165 | 145 | 9,5 | 10 | 10 | 11135 |
| 170 | 150 | 9,5 | 10 | 10 | 11136 |
| 180 | 160 | 9,5 | 10 | 10 | 11137 |
| 190 | 170 | 9,5 | 10 | 10 | 11139 |
| 200 | 180 | 9,5 | 10 | 10 | 11140 |
| 210 | 190 | 9,5 | 10 | 12 | 11141 |
| 220 | 200 | 9,5 | 10 | 12 | 11142 |
| 225 | 205 | 9,5 | 10 | 12 | 11143 |
| 235 | 215 | 9,5 | 10 | 12 | 11144 |
| 250 | 230 | 9,5 | 10 | 12 | 11147 |
| 265 | 245 | 9,5 | 10 | 12 | 11149 |
| 280 | 260 | 9,5 | 10 | 12 | 11152 |
| 290 | 270 | 9,5 | 10 | 12 | 11153 |
| 300 | 280 | 9,5 | 10 | 12 | 11154 |