What are Valves?

Valves are mechanical devices that control the flow and pressure within a system or process. They are essential components of a piping system that conveys liquids, gases, vapours, slurries etc..

Different types of valves are available: gate, globe, plug, ball, butterfly, check, diaphragm, pinch, pressure relief, control valves etc. Each of these types has a number of models, each with different features and functional capabilities. Some valves are self-operated while others manually or with an actuator or pneumatic or hydraulic is operated.

Functions from valves are

1- Stopping and starting flow

2- Reduce or increase a flow

3- Controlling the direction of flow

4- Regulating a flow or process pressure

5- Relieve a pipe system of a certain pressure

Different Types of Valve with P&ID symbols 

Click Here To See Different Types Of Valves With PDF File