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This valve type started as a simple on/off valve suitable for low work pressure.
But butterfly valve features and advantages induced to utilize this valve type in always greater pressure ranges and, when applicable, also for flow control purpose.
Nencini manufactures butterfly valve in numerous alternative disc designs; symmetrical, unsymmetrical, double-eccentric, and biplane type.
The main data on this type of valve follows:
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| Medium |
Water (drinking, corrosive, waste) |
| Features |
The advantages of butterfly valve, in front of different valve types of the same size, are:
light weight and compact size, low cost, quick mounting/dismounting, minimum head losses, easy change of seal, minimum maintenance, bubble tight shut-off in one or both two directions.
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| Application |
As on/off valve, for maintenance purpose of pipes, valves, turbines, pump, etc..
As safety valve for big pipes failure, power plants.
As check valve in pumps house.
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| Size |
From DN100 to DN4000 (from 4" to 160") |
| Pressure Class |
From PN10 to PN100 (from ANSI125 to ANSI600) |
| Flanges |
According to main National and International Standards (ANSI, ISO, BS, DIN, ..) |
| Materials |
Welded Carbon Steel, Stainless Steel, Cast Steel, Ductile Iron, Aluminium Bronze. |
| Coating |
Any type of painting cycle and/or rubber lined |
| Actuators |
Electric, hydraulic, electro hydraulic, pneumatic, counterwheights, manual |
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