Check Valve

1 . 1 : Front

1 . 2 : Back

1 . 3 : Left

1 . 4 : Right

1 . 5 : Top

1 . 6 : Bottom

1 . 7 : Cross sectional

1 . 8 : Perspective

1 . 9 : Perspective

An inner wall surface on the out-course side of a flow channel in an inlet pipe body portion is curved from an inlet port to an outlet pipe body portion. A part of an outer wall surface on the in-course side of the flow channel in the inlet pipe body portion protrudes outward in a curved shape while the inner wall surface is depressed outward. A valve stem is positioned on a bias toward the outlet pipe body section from the center of the inlet port in the bottom view.