Presents the structures and features of 70500 series adjusting valve manufactured byMasoneilan Co. and presents problems existing in some of the adjusting valves when in use as well asthe measures to solve the problems.

• 介绍Masoneilan公司生产的70500系列调节阀的结构、特点，并阐述部分调节阀在使用中存在的问题及改进措施。