In the process of production of pump and valve castings, it is necessary to control and inspect the quality of the castings. First, the process codes and technical conditions for the control and inspection of raw materials and auxiliary materials to each specific product shall be formulated. Each process is strictly controlled and tested according to the technical code and technical conditions. Finally, the quality of the finished castings is checked. Be equipped with reasonable testing methods and appropriate inspectors.
When designing pump and valve castings, in addition to determining the geometry and size of the casting according to its working conditions and metal material properties, the rationality of the design must be considered from the perspective of casting alloy and casting process characteristics, ie Significant size effects and problems such as solidification, shrinkage, stress, etc., to avoid or reduce the occurrence of defects such as segregation, deformation, cracking of the casting.
Pump and valve castings must have a reasonable casting process, that is, according to the structure, weight and size of the casting, casting alloy characteristics and production conditions, choose the appropriate parting surface and shape, core making method, reasonable setting of casting ribs, cold iron, riser and pouring systems, etc. to ensure the quality of castings.