Abstract: A combined valve includes a pilot mechanism and a manual mechanism. The manual mechanism includes: a flange formed with a communication passage; a housing including a holding hole formed in an axial direction for rotatably holding the manual mechanism and a storage opening part having a wider diameter than the holding hole and housing the flange in position; an operation port located in a position corresponding to the holding hole and internally holding a joint; and an exhaust port opening in an inner wall of the storage opening. The manual mechanism further includes a first sealing member forming a connecting passage to connect the operation port and the communication passage between the housing and the manual mechanism; and a second sealing member sealingly separating an opening portion of the exhaust port opening in the inner wall of the storage opening part from the connecting passage.

Abstract: To provide a low-cost air-operated valve, an air-operated valve comprises a piston, a cylinder in which the piston is allowed to slide by operation air, and a valve section to be driven by sliding movement of the piston. The cylinder includes an outer member having a hollow portion and an inner member loaded in the hollow portion of the outer member to define a piston chamber in which the piston is allowed to slide.

Abstract: A combined valve comprising a pilot mechanism (3) and a manual mechanism (4), the manual mechanism (4) including: a flange (46e) formed with a communication passage (46c); a housing (18) including a holding hole (18a) formed in an axial direction for rotatably holding the manual mechanism (4) and a storage opening part (18b) having a wider diameter than the holding hole (18a) and housing the flange (46e) in position; an operation port (34) located in a position corresponding to the holding hole (18a) and internally holding a joint (35); an exhaust port (38) opening in an inner wall of the storage opening (18b); a first sealing member (48, 53, 54) forming a connecting passage (S1) to connect the operation port (34) and the communication passage (46c) between the housing (18) and the manual mechanism (4); and a second sealing member (3) sealingly separating an opening portion of the exhaust port (38) opening in the inner wall of the storage opening part (18b) from the connecting passage (S1).

Abstract: A fluid control valve comprises a diaphragm formed of a plurality of circular thin metal plates laminated one on another, the diaphragm being placed to be movable into or out of contact with a valve seat for closing and opening the valve. Each thin metal plate has a warp in a predetermined direction due to rolling anisotropy, and the thin metal plates are laminated with the directions of respective warps coinciding with one another in such a manner that variations in lift amount of the diaphragm are decreased.

Abstract: To provide a low-cost air-operated valve, an air-operated valve comprises a piston, a cylinder in which the piston is allowed to slide by operation air, and a valve section to be driven by sliding movement of the piston. The cylinder includes an outer member having a hollow portion and an inner member loaded in the hollow portion of the outer member to define a piston chamber in which the piston is allowed to slide.

Abstract: A hand-operated valve with a locking mechanism is disclosed. This valve includes: a valve main body including a valve body, a valve seat, and a screw mechanism which is actuated to bring the valve body into contact/noncontact with the valve seat; a locking mechanism for preventing actuation of the screw mechanism during a time when the valve body is in contact with the valve seat to close the valve; an operating member connected to the valve main body, for actuating the screw mechanism for contact/noncontact operation of the valve body with respect to the valve seat to thereby close/open the valve; and a play providing mechanism interposed in a connection between the operating member and the valve main body, for preventing the actuation of the screw mechanism during a predetermined stage of operation of the operating member.

Abstract: A hand-operated valve with a locking mechanism is disclosed. This valve includes: a valve main body including a valve body, a valve seat, and a screw mechanism which is actuated to bring the valve body into contact/noncontact with the valve seat; a locking mechanism for preventing actuation of the screw mechanism during a time when the valve body is in contact with the valve seat to close the valve; an operating member connected to the valve main body, for actuating the screw mechanism for contact/noncontact operation of the valve body with respect to the valve seat to thereby close/open the valve; and a play providing mechanism interposed in a connection between the operating member and the valve main body, for preventing the actuation of the screw mechanism during a predetermined stage of operation of the operating member.