Structural characteristics of the valve closure member in accordance with the direction of the valve seat can be divided into:
(1) gate-shaped cross-section: close member along the seat centers; such as the cut-off valve
(2) tap and ball: closure member is a plunger or ball, rotating around the center line itself; if plug, ball
(3) gate shaped: the closure of parts moving along the vertical seat centers; such as gate valves, gates and other
(4) swing shape: Close the valve seat member around the outside of the axis of rotation; as swing check valves, etc.
(5) butterfly: the closing member disc rotation about the axis of the valve seat; such as butterfly valve, butterfly valve, etc.
(6) spool shape: the closure member in the direction perpendicular to the slide channel. The sliding