Pneumatic valve pneumatic brake valve body structure

the structure of the pneumatic valve, gate
the structure of the pneumatic valve pneumatic brake valve body decision and pneumatic valve and pipe, pneumatic valve body and valve cover connections, in terms of manufacturing methods, casting, forging, forging, welding, cast joint and several kinds of tube sheet welding, etc.
usually from economic considerations, nominal menstruation mm or greater than the pneumatic valve adopts casting, less than the forging of mm. However, with the development of the modern casting and forging technology, has gradually break through the limit. Forging pneumatic valve body has to develop in the direction of large diameter, and casting pneumatic valve body gradually to the development of small diameter. Any a kind of pneumatic valve pneumatic brake valve forging, also can cast, should be based on user requirements and the manufacturer with manufacturing methods.
and pneumatic valve pneumatic brake valve port
port can be divided into pneumatic valve pneumatic brake valve, full size and reducing type two kinds. Flow aperture and pneumatic valve nominal menstruation and basically the same for all sizes, Circulation pore size smaller than nominal pneumatic valves are given. it is called reducing type. Reducing uniformly reducing evenly and reducing costs are two kinds. Flow in cone tube is a kind of non-uniform shrinkage, this kind of pneumatic valve inlet side aperture is basically the same as the nominal diameter, then gradually narrowed, to pneumatic seat to shrink to a minimum.
with reducing type port ( Whether the cone tube non-uniform reducing or even reducing) , its advantage is the same specifications of the pneumatic valve, can reduce the size of the ram, opening and closing force and moment; The disadvantage is that flow resistance increases, the pressure drop and increase energy consumption, so the shrinkage cavity shoulds not be too big. For cone tube shrink diameter, inner diameter of the pneumatic valve seat and the ratio of the nominal diameter, usually take. ~。 。 Nominal diameter less than the reducing of the mm of pneumatic valves, the pneumatic valve seat diameter than nominal diameter reduce a commonly; Mm or greater than nominal diameter reducing pneumatic valves, the pneumatic valve seat diameter than nominal diameter lower leg.

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