Fluorine lined gate valve is divided into two series of open rod gate valve and dark rod gate valve, open rod gate valve refers to the gate with the gate rod for linear movement; Dark rod gate valve refers to the valve stem nut is located on the gate, the valve stem rotates, so that the gate for linear movement; The company adopts a new structure, to solve the ordinary dark rod gate valve due to particles, fibrous medium deposit in the screw groove caused by inconvenient operation or stuck phenomenon, the valve installation position is not subject to any restrictions.