VALVE FOR HIGH TEMPERATURE

摘要

PROBLEM TO BE SOLVED: To provide a valve for high temperature ideal for high temperature fluid with which high temperature fluid can be surely shut off at closing. SOLUTION: A valve element 10 has a spherical surface 21 having a projecting spherical shape coming into line contact with the entire circumference of a valve seat 8 at closing. The lower end of a valve rod 9 is inserted into a supporting space of the valve element 10. A valve supporting part 9b formed in the lower end of the valve rod 9 supports the valve element 10 in the supporting space by engaging with an engaging part 20b formed in the valve element 10 from below. The bottom surface 24 in the supporting space is formed in a recessing spherical shape. The lower end spherical surface 9d of the valve rod 9 is brought into point contact with the bottom surface 24 in the supporting space at one position with the valve seat 8 closed by the valve element 10. A belleville spring 26 for thrusting the valve element 10 in the closing direction is provided in the supporting space. COPYRIGHT: (C)2006,JPO&NCIPI