What are valves Why they are important ? Function of Valves Types of Valves Classifications of Valves Function of Valves Stopping and starting flow Reduce or increase a flow Controlling the direction of flow Regulating a flow or process pressure Relieve a pipe system of a certain pressure Types of valves: The major types of valves are classified as per below Gate Valve. Globe Valve. Plug valve. Ball valve. Butterfly valve. Check valve. Diaphragm valve. Pinch valve. Pressure relief valve. Control valve. 2-way valve. Angle valve. Jacketed valve. 1) Basic Function of valves 2) End Connection 3) Based on Material of Construction 4) Based on Mechanical Motion Classification of Valves based on the Basic Function of Valves Based on function is has been further classified in to four type 1) Isolation 2) Regulation 3) Non Return 4) Special Purpose The type of end connection