The shaft is splined to lock into the disc to ensure positive rotation 阀杆用花键锁在阀瓣上,以确保旋转灵活。
2.
The shaft shall be hexagonal or square to ensure positive rotation of the disc and be totally sealed from exposure to the process liquid 阀杆应该是六角形或方形,以确保阀瓣能够灵活旋转,并且完全密封,不会暴露在处理的液体里。