A full bore ball valve has a low flow resistance (high flow coefficient), about the same as a straight piece of pipe. ... The flow path through a standard bore ball valve is narrower with a higher resistance to flow (lower flow coefficient). This resistance to flow causes a larger pressure drop across the valve.

What is difference between full bore and reduced bore ball valve?

There are two different types of ball valves. A full bore valve has the same internal diameter as the pipe, whereas a reduced bore valve has a smaller internal diameter.

Why do we use full port valves?

Full-port ball valves are used where their low flow resistance is of value such as on pump suction pipes, where a pressure drop can affect pump performance. ... Flow is unrestricted but the valve is larger and more expensive so this is only used where free flow is required, for example in pipelines which require pigging.