Product overview: the opening and closing parts of stainless steel internal thread gate valve are plug-shaped valve disc, and the sealing surface is flat or conical. The valve disc moves in a straight line along the center line of the fluid. The movement form of the valve rod includes the lifting rod type (the valve rod is opened and lowered, and the handwheel is not raised and lowered), and the lifting rotating rod type (the handwheel is rotated and lifted together with the valve rod, and the nut is set on the valve body).