3 ) plunger-type valve: This form of cut-off valve is a variant of the conventional cut-off valve . In the valve , the valve plunger and seat are usually based on the principles of design . Polished valve stem is connected with a plunger , seal is set on two elastic plunger seal achieved. Two elastic rings separated by a ring and through the valve cover nut load exerted on the valve cover seals around the plunger pressed firmly. Elastic ring can be replaced , you can use a variety of materials , the valve is mainly used for "on" or "off" , but with a special form of a plunger or special rings can also be used to regulate the flow .

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve