Patent ID: 11859733
Assignee: FUJIKIN INCORPORATED
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 5:
6. A valve device comprising:
a flow passage block in which a flow passage is formed;
a diaphragm configured to open and close the flow passage;
a diaphragm holder configured to hold the diaphragm;
an actuator configured to push down the diaphragm via the diaphragm holder;
a tubular bonnet formed with an internal thread on an inner circumferential surface, the bonnet being configured to join the flow passage block and the actuator;
a tubular position adjusting member threaded to the internal thread, the position adjusting member being configured to come into contact with the diaphragm holder to adjust a valve opening position of the diaphragm; and
an annular lock nut configured to lock the position adjusting member by being screwed into the internal thread;
wherein a first engagement portion is formed in a region of the position adjusting member that does not overlap with the lock nut, the first engagement portion being configured such that a first rotary jig is engaged with the first engagement portion, and
a second engagement portion is formed in the lock nut, the second engagement portion being configured such that a second rotary jig is engaged with the second engagement portion.