The packer DV
The one-day packer produced by company Anton Vorek enables finishing injection works within one day.
The injection valve DV for pressure compression has a reverse valve. That is why, immediately after injecting the part of packer which is out of hole can be unscrewed. The central part of the packer remains in the hole and prevents from leaks of injecting material (also under high pressure). By this the hole is shut for ever. The hole is possible to close immediately and to finish the work.