Disc Stem Nut: Disc Stem Ring connects the disc to the stem, permitting the disc to swivel and aid in securing tight seating for trouble-free service.

• 阀瓣阀杆螺母：阀瓣阀杆环将阀瓣连接到阀杆上，使得阀瓣能够旋转，并有助于保证阀座地紧密密封和无故障运行。