1.（body）
Parts that are directly connected with pipes (or machinery and equipment) to form the medium flow passage
2.（bonnet, cover, cap, lid）
The main parts connected with the valve body and forming the pressure chamber with the valve body (or through other parts）
3.（disc）
A general term for a part used to cut off or regulate the flow of medium, such as the gate in a gate valve, the disc in a throttle valve, etc.
4.（body seat ring, shoulder seated, bottom seat）
Parts installed on the valve body to form a sealing pair with the opening and closing parts.
5.（sealing face）
The opening and closing parts are closely fitted with the valve seat (valve body) and serve as two contact surfaces for sealing.
6.（stem, spindle）
The main parts that transmit the hoisting force to the hoist.
7.（yoke bushing, yoke nut）
Parts that form a motion pair with the stem threads.
8.（stuffing box）
Parts filled with packing to prevent medium from leaking from valve stem.
9.（gland, gland flange, pne-piece glang）
Parts used to compress packing to seal.
10.（packing,packing rings）
Packed into stuffing box (or stuffing box) to prevent leakage of filler at double valve stems of medium.
11.（yoke）
On the bonnet or valve body, it is used to support the stem nut and parts of the drive mechanism
