It is important to note that the head's thickness is only comprised in less then 25 mm! This is necessary to enable it to be inserted through the cavity generated from the coaxial feeding of the steel service pipe with the extruded high-density polyethylene external pipe. Both tubes run in the same direction at the same speed.

Basically the head's name was chosen for the innovative mixing chamber geometry, which is based on a Z-shaped layout. It is characterized by a maximum width of 20÷25 mm and can be easily handled for its lightweight (900 g version A; 1.100 g version B). The chemicals are radially injected at high-pressure through special spring injector nozzles that are driven by relevant component pressure.

When the pressure in the feeding stream overcomes the nominal strength of the spring the material is poured. The component mixing is achieved by the injection at high-pressure impingement inside the mixing chamber. Also the turbulence generated during the injection is utilized as kinetic energy to improve the mixing phase, the homogeneity and the quality of the polyurethane foamed.