What are 3 functions of valves?

Valves have various important functions in fluid systems, including:

1. Controlling Fluid Flow: Valves are used to regulate the flow of liquids and gases in a system. By opening, closing, or partially opening a valve, the amount of fluid passing through can be controlled or stopped completely. This allows for the precise management of fluid flow and pressure within a system.

2. Preventing Backflow: Valves can prevent the unwanted reversal of fluid flow in a system. Check valves, for example, allow fluid to flow in only one direction, preventing backflow and ensuring proper operation of the system. This is crucial in situations where backflow could cause damage to equipment or pose safety risks.

3. Regulating Pressure: Valves can be used to control and maintain the pressure of fluids within a system. Pressure relief valves, for instance, open when the pressure exceeds a set point, releasing excess fluid and protecting the system from potential damage caused by high pressure. By regulating pressure, valves ensure the safe and efficient operation of various systems.