What is a parallel double gate valve? Parallel double gate valve is also called rising stem gate valve. When opened, the valve stem is exposed to the outside of the valve body and moves up and down. The stem nut is located on the valve cover or bracket, even if the nut rotates, the stem will not rotate, and the opening/closing part will move up and down to open and close the valve.

The parallel double gate valve can indicate the opening height of the valve by the change of the exposed length of the stem, and the stem nut and stem thread are not in contact with the medium. Parallel double gate valve is not easy to be corroded by medium and has good lubrication conditions, but its height is relatively high, and it is used in places where the height is not restricted or corroded. The double gate valve is divided into single gate and double gate according to the number of gates. According to the shape of the gate, it can be divided into parallel type and wedge type.