The structure and principle of the five types of pneumatic valves

. Pneumatic valve gate
pneumatic valve, pneumatic valve is also called the brake disc is a widely used pneumatic valves. It closed gate seal face be consistent with the pneumatic valve seat sealing surface height is bright and clean, smooth, fit each other, can prevent the medium flow, and to rely on the top die, spring, or ram die shape, to enhance the sealing effect. It plays a role of cut off the main in the pipeline.
it's advantages are: small fluid resistance, opening and closing ShengJin, can be used in the case of a two-way flow of medium, no direction, wide open sealing surface is not easy to erosion, the structure length is short, not only suitable for small pneumatic valves, and suitable for large pneumatic valves.
brake pneumatic valve according to the two kinds of pneumatic valve stem thread is a bright bar type, 2 it is dark bar type. According to ram structure points, also two kinds, one is parallel, the second is mode.
。 By the pneumatic valve
by the pneumatic valve, also called door and is one of the most widely used pneumatic valve, it is popular, is because of the sealing surface friction between the opening and closing process, more durable, open height is not big, manufacturing easy, convenient maintenance, not only suitable for low voltage, and is suitable for high pressure.
it is the closing of the principle, rely on the bar pressure pneumatic valve, pneumatic valve sealing surface with pneumatic valve seat sealing surface fit closely, prevent medium circulation.
as pneumatic valve only unidirectional flow medium, the installation direction. Its length is greater than the brake the structure of the pneumatic valve, at the same time, fluid resistance is big, long runs, seal reliability is not strong.
the pneumatic valve is divided into three categories: straight through, right Angle type and once-through inclined by the pneumatic valve.
。 Pneumatic valve
butterfly pneumatic butterfly valve is also called the pneumatic butterfly valve, as the name implies, its key parts like butterflies fluttering, free.
butterfly pneumatic valve pneumatic disc is disc, revolve around pneumatic seat within a shaft, the size of the swing Angle, is the pneumatic valves open and close.
butterfly pneumatic valve has the characteristics of light, to save material, than other pneumatic valve has simple structure, rapid opening and closing, cut off and throttling can, fluid resistance small, easy operation. Pneumatic valve, butterfly can make large caliber. Can use pneumatic valve adjustment, it is best not to make the brake pneumatic valve, because butterfly than economic brake pneumatic valve, pneumatic valve and regulatory. At present, the pneumatic valve adjustment in the hot water pipe is widely used.
。 Pneumatic ball valve
pneumatic ball valve is to rely on the working principle of pneumatic valve pneumatic valve love to make smooth rotation or occlusion. Pneumatic ball valve switch lightweight, small size, can make a large caliber, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, has been widely used in various industries.
two kinds of pneumatic ball valve is a floating ball type, 2 it is fixed ball type.
。 Check pneumatic valve
check pneumatic valve is rely on the power of the fluid itself automatically opening and closing of pneumatic valves, its role is to prevent backflow of medium. Its name a lot, such as non-return pneumatic valve, pneumatic valve, one-way flow of single door, etc. According to the structure can be divided into two categories.
( Lift: pneumatic disc along the body vertical centerline mobile straight. This kind of check pneumatic valve has two kinds: one is horizontal, installed in horizontal pipe, appearance similar to stop pneumatic valve, pneumatic valve body, the other is a vertical load on the vertical pipe,.
( Swing: pneumatic disc around the outside of the pin shaft rotation, this kind of pneumatic valve has a single disc, more than double disc and disc, but the principle is the same.
the pump suction pipe of the suction bottom spirit pneumatic valve is a check valve, the deformation of the structure is the same as the above two types of check for pneumatic valves, but its bottom is open, so that can make the water to enter.