Medical valve with positive flow characteristics

A folded movable medical valve, comprising: aThe shell and arranged in the main channel a rigid piston. The shell comprises: First end first-class body port of the shell; The horizontal first-class body shell port at least thread of the outer surface; With the first end of the second end; A first central shaft body channel; The; the branch with for defining and a liquid outlet connected with the second central shaft of branch channel; The second liquid outlet on the branch; Surrounds branch's at least one part of the outer tube, and at least thread on the sleeve pipe; And air ventilating. A piston comprises: The head end and second end, the piston the first sealing of the first end, as well as to the second end and sealing piston of. ; The second area and a second sealing and a room in the main channel is constructed to move in the first position is made from the second position matched with the piston to wind shell through the air ring of air vents.