Fire-fighting unit compliant with UNI EN 12845 and UNI 10779 standards with Diesel electric pump or motor pump. Designed for automatic fire extinguishing systems equipped with sprinklers and/or hydrants. KVT is a vertical immersed axial flow pump. It is possible to couple several groups (up to 3 pumps). Thanks to the submerged pump body and the motor control unit on the surface, the problem of priming is eliminated as well as facilitating the maintenance work. As the standard also provides, the units are modular in order to be combined with each other. The control head is coupled via an elastic spacer joint to an electric or diesel motor, which can also provide zero flow. By a coupling kit (supplied separately) it is possible to assemble all the versions foreseen by the standard with and without compensation pump. Delivery column sized to limit the maximum speed, checkable swing check valve and shut-off valve assembled before the delivery manifold. Version with motor pump equipped with motor speed detection via pick-up sensor.