| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve which can prevent a crack and the deformation of a body by reducing stress generated by careless and excessive heating applied to a shaft-mounted part when brazing a pipe while securing operability and seal performance at stem rotation. ! SOLUTION: A stem 15 for opening and closing a valve body 13 is mounted into a shaft-mounted part 25 provided at a body 11, and a resin-made packing 20 is mounted in a packing chamber 27 in the shaft-mounted part 25. A thermal expansion absorbing member 21 having heat resistance and absorbing the thermal expansion of the resin-made packing 20 is laminated on the non-contact liquid side of the resin-made packing 20, and the thermal expansion absorbing member 21 is fastened by a gland 16 which is screwed into a screw part 26 of the shaft-mounted part 25. ! COPYRIGHT: (C)2014,JPO&INPIT |
