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

Claim 2:
3. The valve device according to claim 1, wherein
an annular portion is formed on an end portion of the bonnet located on the flow passage block side, the annular portion having an inner diameter smaller than an inner diameter of the internal thread,
an annular spacer is provided between the end portion and the flow passage block, the spacer having an inner diameter smaller than the inner diameter of the annular portion,
the diaphragm holder has:
a guided portion having a movement restricting surface facing the spacer, the guided portion being configured to be guided by the annular portion; and
an insertion portion configured to be inserted into an inner circumferential side of the spacer, the insertion portion being located at the flow passage block side from the guided portion, and

movement of the diaphragm holder toward the flow passage block side is restricted by contact between the movement restricting surface of the guided portion and the spacer.