DMD2000 V-RING
The HUNGER DMD Tandem 2000 V-packing System consists of a special U-cup sealing element preceded by pressure reducing low friction wear resistant V-Packings and a support ring to provide the correct system pretension. The combined elements provide low friction stick-slip free movement at both high and low operating speeds.
The number of V-packings and width of support ring can be varied according to the existing installation groove dimensions.
The U-cup has an integrated sealing ring made from a low friction and low wear PTFE-Compound which guarantees smooth operation at high operating pressures and stick-slip free movement after long periods of inactivity. In general, packing widths correspond to groove widths. The DMD Tandem 2000 is only suitable for rod sealing in non-adjustable installation grooves.
| Materials | |||
| Pressure Ring | V-Packing | ||
| Standard | PUR | PTFE-Pure | |
| Alternative (on request) | NBR, HLTR, FKM, PUR-H | NBR, NBR-TT, FKM, PTFE-Compounds, Engineering Plastics | |
| Application Range | |||
| Pressure [bar] | Temperature Range [°C] | Sliding Speed [m/s] | |
| Standard | 360 [450*] | -35 … +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 | Ref. Number |
| 40 | 48 | 22,5 | 22,5 | 409247 |
| 40 | 52 | 22,5 | 22,5 | 411572 |
| 56 | 71 | 22,5 | 22,5 | 77024 |
| 63 | 78 | 22,5 | 22,5 | 425551 |
| 80 | 95 | 22,5 | 22,5 | 77952 |
| 100 | 120 | 32 | 32 | 77959 |
| 140 | 155 | 40 | 40 | 422321 |
| 140 | 160 | 40 | 40 | 424846 |
| 150 | 170 | 40 | 40 | 422132 |
| 160 | 180 | 40 | 40 | 77074 |
| 180 | 200 | 40 | 40 | 76798 |
| 200 | 230 | 60 | 60 | 407840 |
| 210 | 240 | 60 | 60 | 422326 |
| 220 | 250 | 60 | 60 | 418536 |
| 230 | 260 | 60 | 60 | 405451 |
| 260 | 280 | 30 | 30 | 423352 |
| 260 | 280 | 42,5 | 42,5 | 417209 |
| 260 | 280 | 50,5 | 50,5 | 411963 |
| 280 | 310 | 60 | 60 | 407841 |
| 290 | 320 | 60 | 60 | 425300 |
| 300 | 330 | 58 | 58 | 78003 |
| 300 | 330 | 60 | 60 | 417207 |
| 360 | 390 | 50,5 | 50,5 | 78015 |
| 360 | 390 | 60 | 60 | 418913 |
| 400 | 430 | 54,5 | 54,5 | 76735 |
| 600 | 640 | 58 | 58 | 77000 |
| 650 | 690 | 70 | 70 | 77077 |
| 800 | 840 | 58 | 58 | 76999 |
| 810 | 850 | 70 | 70 | 76883 |