When pre-assembling cutting edge fittings by hand, it is necessary to bring the pipe with the cutting ring and union nut to the vice with the pre-assembly spigot. Regardless of the type of pre-assembly, the pipe must be deburred and free of swarf. A considerably higher amount of force is required for sizes from 12 mm.
For sizes over 12 mm and for applications with higher quantities, we recommend the use of electro-hydraulic pre-assembly devices. Regardless of the size used, these guarantee consistent assembly quality without the need for force and therefore also a considerable reduction in assembly time.