High performance 3-way ball valve use for flow bypass or joined, is a multi-port ball valve with two sides or four sides valve seat, any port can be used as an inlet but without leakage. The three ways can be made as L port or T port. Valve ball adopt the bottom entry can be easily convertible into fixed ball type 3 way ball valve. In addition valve bonnet, bottom cover and side cover all assembled with bolts, can be easily convertible into 4 way or 5 way ball valve, and easy for installation, removed and maintenance. With ISO5211 high platform design make the actuator easily mounted thus do not need the mounting bracket.