When selecting pneumatic valve blank should be considered as follows

mechanical processing of commonly used blank casting, forging, profiles and welding. Different kinds of blank and the precision of the blank, roughness and hardness has a direct impact on machining process. When selecting pneumatic valve blank should consider the following factors: the improvement of the material and the material of the parts of organization and performance requirements: is provided in the design of component materials, largely determines the kind of blank. Parts material is cast iron, for example, must use casting method to produce the blank. For steel parts, should be considered when choosing blank material mechanical performance requirements. Manufacturing high pressure pneumatic valve parts, for example, generally should choose forging or welding, as far as possible to ensure that the material has good mechanical properties. 2 parts: the structure shape and dimension parts of structure shape is an important factor of affecting blank choice, for example, the structure of the complex shape of pneumatic valve body should try to choose the casting. Size of the pneumatic valve can choose sand casting; Investment casting will be used on small size. (3) the size of the production program: the more parts of the production program, blank manufacturing method with high accuracy and high efficiency is better the economy. (4) manufacturing conditions: the blank should be based on the scene of the equipment and technology level to select blank condition, prospect and consider the use of advanced step by step the blank manufacturing methods