Manual and pressurized fluid controlled fluid controller

A fluid controller comprising:

• a valve box provided with a fluid passage;
• a valve element configured to open and close the fluid passage;
• a casing provided on an upper portion of the valve box;
• a valve rod configured to move the valve element in an opening or closing direction by moving upward or downward;
• an automatic opening-and-closing device having a piston configured to form a compressed fluid introducing chamber between the piston and the casing and configured to move the valve rod by a compressed fluid;
• and
• a manual opening-and-closing device configured to move the valve rod by a manual operation, wherein
• the manual opening-and-closing device includes:
• a cylindrical handle supported by the casing so as to be capable of rotating and restricted from moving upward and downward;
• and
• a cylindrical operating member screwed into a female screw provided on an inner periphery of the handle and configured to move upward and downward in association with a rotating operation of the handle, wherein
• the operating member is vertically offset from the piston of the automatic opening-and-closing device during automatic opening and closing operations, and the piston is moved by the operating member, which allows for manual upward and downward movement of the piston in association with the rotating operation of the handle during manual opening and closing operations in a direction opposite to a directional bias of the automatic opening-and-closing device at normal opening and closing configurations of the valve element,
• wherein a lower portion of the handle is fitted to an inner periphery of an upper end portion of the casing, an annular groove is formed on an outer periphery of a portion of the handle fitted to the casing, a plurality of first supporting members are mounted on the casing so as to face the annular groove from radially outside, and radially inner end portions of the first supporting members are inserted into the annular groove, so that the handle is supported by the casing so as to be rotatable and to be restricted from moving upward and downward, and
• second supporting members extending radially outward are mounted on the operating member, the casing is provided with through holes which allow insertion of the radially outside end portions of the second supporting members, and the through hole is an elongated hole elongated in the vertical direction, so that the operating member is supported by the casing so as to be restricted from rotating and to be movable upward and downward.