The Three-way valve mean the valve which has 3 ports or openings instead of just two. This multiport configuration is able to redirect the fluid from the main valve inlet to two different directionseach served by two separate valve outlets. Other main uses of the 3-way ball valve are that the main flow line is served by two independent and alternative inlets. The 3-Way valve permits the selection of two different flow patterns from the same valve.
The three-way valve has two types in valve ball, L-port and T-port. They are used in different functions. Three-way ball valves are popular because they are an economical and simple way of providing both shut off and flow direction control in a single valve body.Three-way valve is one kind of multi-port valve, there are also four- and five-way ball valves and so on as multi-port valves.