| 摘要 |
PROBLEM TO BE SOLVED: To provide a silent pressure reducing valve by preventing occurrence of abnormal sound due to looseness at a connection part between a diaphragm rod and a valve shaft part when opening and closing a pressure reducing valve body.SOLUTION: A connection mechanism 39 for connecting a valve shaft 27 of a pressure reducing valve body 10 with a diaphragm road 38 comprises: a bottomed connection hole 40 that is arranged at the diaphragm rod 38; a diameter-reduced shaft part 27a provided at the valve shaft 27, and first and second diameter-enlarged shaft parts 27b and 27c axially arranged on both sides of the diameter-reduced shaft part 27a; a holding plate 41 that includes: a locking recess part 41a opening to one side for allowing loose insertion of the diameter-reduced shaft part 27a and is engaged to the connection hold 40; and a locking ring 44 that is engaged with a first locking groove 42 on an outer periphery of the holding plate 41 and with a second locking groove 43 on an inner periphery of the connection hole 40 in the form of enabling diameter enlargement along a radial direction of the valve shaft 27. In the connection hole 40, a set spring 58 for energizing the holding plate 41 to a valve opening side of the pressure reducing valve body 10 is provided by shrinking. |
