Each single packer can easily be transformed into a double packer assembly by adding a specific element :
Each single packer from Ø 28mm to Ø 170mm can easily be transformed into a double packer assembly by adding a specific element : the central element CE. Just unscrew the sliding end from the single packer and replace it with the CE element. Complete the installation by screwing a standard inflatable element S (sleeve) and a plug PL on the lower part of the packer. The perforated CE central element from Ø 56mm to Ø 170mm consists of a compact and perforated tube, with a diameter identical to the whole packer assembly. This design makes the double packer ZI extremely robust and the external flush O.D. is particularly well adapted to micro-piles grouting and water pressure tests.