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Valve is a device used to regulate the flow of material, then it may be gas, fluidized solid, slurries, or liquid. Technically Valves are categorized under pipe fittings category, but due to its varied applications and different types they are discussed separately.
Generally valves are operated manually, either by a hand wheel or lever. Some valves are 'self-operating' driven by changes in pressure, temperature or flow. These changes in pressure or temperature often act against springs or capsules filled with expanding substances.
One can think about the vast nature of valves just by seeing the fact that valves are available in a size of 6 mm to 5000 mm diameter.
Valves Classification on the basis of operating positions
a). 2-Way Valves - - Also known as 2-port valves. Operating positions for such valves can be either shut (closed) so that no flow at all goes through, fully open for maximum flow, or sometimes partially open to any degree in between
b). 3-Way Valves - - Also known as 3-port valves. Three-way valves are commonly made such that flow coming in at one port can be directed to either the second port in one position or the third port in another position or in an intermediate position so all flow is stopped. Often such 3-way valves are ball or rotor valves.
List of some Common Valves
To source different types of valves one can refer the list of manufacturers and Suppliers Of Valves available at various online B2b Marketplaces.
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