Floating valve double disk type
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7HFKQLFDO IHDWXUHV 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...

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. The closure of the valve is watertight and it is realized by two O-rings made of Neoprene rubber that touch against the seats made of bronze or stainless steel, directly forced on the valve body. In case of wear, these rings can be easily replaced, dismounting the valve from above. In this case, it is possible to remove the stem, complete of disks. The sliding of the stem, realized in high-grade stainless steel, is made by means of bronze bushings, to...

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Di Nicola For a better operation of the valve, it is advisable to keep the floating separate from the water flow; the best solution is to use a calm basin for the floating, to be supplied on request, as showed on Tab 3, or to use a guide ring to be fixed to concrete manufacture. The floating can be also rotated perpendicularly to the valve axis, as showed on Tab 4 and Tab 5. However, all the accessories indicated on Tab 4 are available and they can be supplied on request. It is also possible to supply the valve with a 90° connection, as indicated on Tab 5. )ORDWLQJ YDOYH GRXEOH GLVN W\SH

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Di Nicola 'LPHQVLRQLQJ For the dimensioning of the valve there needs to know the nominal flow and the difference between donwstream and upstream pressures, at nominal flow. The DN of the valve will be the diamenter bigger or equal to “D” value, obtained by the following formula: 4 ∆+ Where Q = flow in m3/s ' = 750 ∆H = difference of pressure upstream/downstream in m of water column at maximum flow. Example: Q= 0,55 m3/s ' = 750 The valve to be used must have DN>D, so, the most suitable diamenter is DN 250mm.. The PN depends on the maximum working pressure. Anyhow, our technical department...

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* Available only on design: for the dimensioning it is necessary to know the flow and pressure data. ** Only for electrowelded steel costruction. 0DWHULDOV - Body Spheroidal cast iron GGG50 or Electrowelded steel grade S275J (equivalent to ST 44) – on request, cast iron GG25 Stainless steel Aisi 304L or electrowelded steel grade S275J (equivalent to ST 44) with seat on disk in Stainless steel Aisi 304L - on request, Aisi 316L - Stem and pins Stainless steel Aisi 420 - Bushing Electrowelded carbon steel grade S275J (equivalent to ST 44) - Stainless steel Aisi 304L, on request all the pieces...