Hydraulic valves
Hydraulic valves: components that make the difference
Hydraulic valves are a fundamental element within a system because they allow you to control the flow of liquid or air flowing inside it. They are used to intercept the fluid, blocking it or allowing it to flow, but they can also regulate its path, pressure and flow rate. According to their function it is therefore possible to distinguish:
Types of hydraulic valves: which one to choose?
The valves are also classified according to the shape of the shutter, that is, the moving component of the device which determines the flow control with its movement. Thus we speak of sphere valves, butterfly valves, globe valves, gate valves, clapet valves, needle valves, ball valves, double disc valves, spring and swing valves and float valves.
Each of these types has construction characteristics that make it suitable for a specific function.
It is also possible to choose between valves in different materials, such as stainless steel, bronze, brass or plastic; also in this case for the choice it is important to consider the application and the characteristics of the fluid that is conveyed by the system.
Finally, the valves can be operated manually or can be motorized valves. In this case, activation takes place, for example, through electric or pneumatic actuators.
How hydraulic valves contribute to saving energy
Each valve is characterized by a flow coefficient (KV) which measures the flow of water that passes through it at a differential pressure of 1 bar between the inlet and outlet. It is a very important value to correctly size the valve and to evaluate the localized pressure drop in the valve. With the same flow rate, hydraulic valves with a high KV are to be preferred as they are able to contain pressure drops. In this way, even a single component can become an important ally for the hydraulic efficiency of the system and consequently for energy saving.
