As the selection of pneumatic valve method to guide 3)

pneumatic stem and valve seat sealing surface of the surface of the vertical axis. Pneumatic open or close the valve stem travel relatively short, and very reliable cutting action, make this kind of pneumatic valves are suitable for, cut off or adjust the use. Once the pneumatic valve pneumatic valve open position, it's no contact between pneumatic seat and clapper sealing surfaces longer, there is a very reliable cutting action, close to the pneumatic valve is cut off or adjust for medium and throttling. When the pneumatic valve opens, the pneumatic seat and clapper sealing surfaces between open without sealing surface, so it has less mechanical wear of pneumatic seat and pneumatic valve repair or replacement easier to seal up, and don't need to delete the pneumatic valve pneumatic valve from the contact time and the occasions in which is very applicable welded steel pipe. Medium by a pneumatic valve, this kind of change flow direction, so high as pneumatic valve flow resistance in other pneumatic valves. Commonly used by the pneumatic valve has the following kinds:) Angle type by the pneumatic valve, Angle type by the pneumatic valve, fluid change a direction, so that compared to the conventional structure of the pneumatic valve by pneumatic valve pressure drop. ） Once-through as pneumatic valve; In a once-through or Y type pneumatic valve, pneumatic valve body with a slash main channel flow, so the destruction of the flow state is less than the traditional by the pneumatic valve, and through the pressure loss of the pneumatic valve smaller accordingly. ） Plunger deadline pneumatic valve: this stop pneumatic valve is in the form of a variant of traditional pneumatic valves. In pneumatic valves, pneumatic disc and seat is usually based on plunger design principles. Polishing to the pneumatic valve rod connected to the plunger, the elasticity of the plunger seal seals, realize two sets. Two elastic sealing ring with a set of rings is separated, and through the air valve cover nut on the pneumatic valve load GaiZhu plug seal pressure around the prison. Elastic sealing ring can be replaced, you can use a variety of materials, the pneumatic valve is mainly used in the 'on' or 'off', but with the special form of plunger or special ring, can also be used to adjust flow. Keywords:
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