Tees ball valve works
L-type three-way flow valve seat 4 side by side 2 seat, force balance, to ensure a reliable seal on the closed channels only. Mainly used for the flow path.
T-type three-way flow valve seat face 4, 4-seat plane, force balance, to ensure a reliable seal on the closed channels only. Mainly used for streaming, Franged, and three channels for the completely open.

Tees ball valve has advantage
1. Fluid resistance, the resistance coefficient with the length of the barrel of the same.
2. Simple structure, small size and light weight.
3. Close and reliable valve sealing surface material widely used plastic, sealing in a vacuum system has also been widely used.
4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation 90