| 摘要 |
PROBLEM TO BE SOLVED: To enable a life span to become longer than ever even when a cone valve is used as a check valve when slurry containing highly abrasive coarse particles is supplied.SOLUTION: A cone valve 1 for being used as a check valve during supply of slurry includes at least a valve body 11, a valve seat 13, and a spring 14 that is built in to bring then valve body 11 into contact with the valve seat 13. The overall length of the spring 14 is shorter than at least the stroke length of the valve body 11.SELECTED DRAWING: Figure 3 |
