SHUT-OFF VALVE

摘要

There is provided a shut-off valve including: a valve body part having a valve body surface; a valve seat part provided around an inlet, and having a valve seat surface disposed at a position opposite to the valve body surface; and a moving mechanism that is connected to the valve body part, and moves the valve body part in a direction of an axis to switch to either a shut-off state or a circulation state, wherein the valve seat part has an endless inner peripheral side projection and an endless outer peripheral side projection that project from the valve seat surface toward the valve body surface along the axis, and the valve body part has a diaphragm forming the valve body surface, and an elastic member disposed on a back surface of the diaphragm.

主权项

1. A shut-off valve comprising:
a valve body part that moves along an axis inside a valve chamber, and has a valve body surface formed on a plane orthogonal to the axis; a valve seat part provided around an inlet that allows fluid to flow in the valve chamber along the axis, and having a valve seat surface located at a position opposite to the valve body surface; and a moving mechanism that is connected to the valve body part, and moves the valve body part in a direction of the axis to switch to either a shut-off state where the valve body surface comes into contact with the valve seat surface, or a circulation state where the valve body surface separates from the valve seat surface, wherein the valve seat part has a plurality of endless projections that project from the valve seat surface toward the valve body surface along the axis, and are formed so as to surround the inlet, and the valve body part has a diaphragm forming the valve body surface, and an elastic member disposed on a back surface of the diaphragm.