The part is the plate that performs basic functions, closing and opening of the valve. By being attached to the inlet and outlet below the spindle as the spindle rotates if the valve handle is turned, the part directly turns on and off the valve in practice. The sheet has three to four structures including plate type, conical type and etc. In general, the valve that moves vertically is called gate valve and the valve that moves with sheet lying horizontally is called glove valve. As for usage, normally gate valve is used for adjustment of flow rate and glove valve for the control of flow rate.
