Plunger gate valve UZ41H UZ41SM is composed of valve body, bonnet, stem, plunger, guide sleeve, sealing ring, handwheel and other parts (as shown in the figure). When the handwheel rotates, the plunger is driven up and down in the guide sleeve by the valve stem, so that the oblique cone surface and the seat surface of the plunger end complete the opening and closing functions of the valve.