Patent ID: 8141582

Claim:
A flow amount adjusting valve comprising: a body having a passage therein through which a pressure fluid flows; a valve plug displaceably disposed inside of said body and which is seatable on a valve seat formed in said body; an indicator element, which is displaced along an axial direction based on a displacement operation of said valve plug, thereby enabling an opening/closing amount of said valve plug to be confirmed visually from the exterior; an operating element having a first screw-engaged portion with which said valve plug is screw-engaged, and a second screw-engaged portion with which said indicator element is screw-engaged, said operating element, to which a predetermined rotational force is applied, being rotatably supported on said body; and a visual confirming member, which is exposed outside of said operating element when displaced with respect to said operating element, wherein said valve plug and said indicator element are displaced respectively along the axial direction by rotation of said operating element, and a screw pitch of said second screw-engaged portion is set to be larger than a screw pitch of said first screw-engaged portion, and wherein said indicator element includes a plurality of display elements disposed on a upper surface of said visual confirming member, which are made up of numbers corresponding to the number of rotations of said operating element, and a pointer for indicating one of said display elements, said display elements being separated by equal intervals and arranged along a circumferential direction of said visual confirming member.