Di Nicola manufactures mechanisms for detecting the water over speed type Palmola in construction steel and stainless steel EN S275J0 high in Nickel 1.4404 and 1.4462 for over thirty years with sizes between 200 and 300 mm and nominal pressures of 2,5 Bar 64 Bar. These mechanisms are provided alone the turbine guard valves or separately. In the event that you provide separately, Di Nicola emits CE certification of “included machine” for user ‘s manual of other manufacturers or installers.