Disc valve

floatcontrolregulating

The Di Nicola’s floating valve double disk type is the best solution for the control of the level on basins or tanks in presence of high pressure on pipeline. In fact, the structure of double disk type permits the balancing of the pressure thrust on both disks, reducing in this way, the stresses necessary for the operation. For the valve with one disk only, it is necessary to use big floatings even in presence of low pressures and moreover, it is not possible to dimension the valves without knowing all the data referred to the pressure (piezometric pressure, upstream and downstream design pressure). Very frequently, they install a valve that doesn’t close even if there are minimum variations of pressure and, as a matter of fact, these variations of pressure, during the closing phase, originate the closure and the cyclic opening of the valve. In this case, the pressure oscillations increase more and more, until causing the breaking of the pipeline in upstream side. On the contrary, when they use the double disk floating valve, the oscillations of pressure haven’t any effect on the opening degree of the valve, that closes at the maximum level of regulation. For standard applications, our valves are designed to close when the water level reaches the pipe axis; however, it is possible to adjust the floating in order to change this level of +/- 10cm. and it can be also possible to produce valves that close at any level required by the client, since these valves can operate completely submerged as well. Tab 1 and Tab 2 represent the sections of the valve, showing two disks integral to the shaft joined to the connecting stem of the floating