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april 2011

Cavitation in water pressure reducers

Prevent cavitation phenomena that could damage water pressure reducers

Water pressure reducers are devices that reduce and stabilize the pressure inlet to private users that in some particular areas are high or not particularly stable. This is risky for devices connected to the system that can also be expensive and delicate.
The adjustment is carried out by the shutter, which generates a pressure drop and which is the one that, depending on the required flow rate, keeps the outlet pressure stable.
When water pressure reducers are chosen, the reduction ratio and the flow through the device must be taken into account, but we must bear in mind that at a high reduction ratio there is a speed that can be very high at some points.
This can generate the cavitation phenomenon in the water pressure reducers, meaning that this acceleration of the flow decreases the pressure until the liquid itself does not reach the vapor pressure and microbubbles are generated in the fluid, which tend to explode and to create localized overpressures that have such a power as to create a corrosion on the material of the reducers.
The solution is the choice of the right work point that we can get from the graphics provided with the product.

 

13/12/2018


See also
13/02/2017 Pressure reducers for high pressure gas Pressure reducers with a brass or zamak body and pressure adjustment screw

13/12/2016 Water pressure reducers that save water Compensated water pressure reducers can keep the outflow pressure constant

13/10/2017 Waterworks and water pressure reducers Fitting water pressure reducers is essential for reducing the incidence of upstream pressure variations

13/01/2013 The use of pressure reducers with different application fields. Gnali Bocia has refined the features of pressure reducers over time in order to obtain highly efficient components suitable for many different purposes.

13/11/2013 Gas outflow from high pressure reducers The reference standards for high pressure reducers guarantee that, in the event of problems, any excess air can be released.


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