What do the valve body hydrostatic test, low-pressure airtightness test, and valve seat sealing test check respectively? This article explains the standards such as GB/T 13927 and ISO 5208, leakage levels, common leak points, and procurement acceptance documents.
How to perform CNC machining on the shaft hole, end face, and keyway after precision casting of a water pump impeller? This article explains the flow channel forming, machining datum, coaxiality, runout, dynamic balancing, and inspection requirements to help purchasing personnel prepare effective quotation materials.
In pumps, valves, seawater equipment, and chemical fluid components, materials must withstand media corrosion while also maintaining strength and capable of forming complex structures. Duplex steel precision casting combines the material characteristics of austenitic and ferritic dual-phase microstructure with the advantages of investment casting for complex, small parts. It is commonly used for valve bodies, pump bodies, impellers, flange seats, connectors, and non-standard flow channel components. In actual price inquiries, you will often see terms like "2205 precision casting" or "2507 precision casting." It's important to note that 2205 and 2507 are commonly used designations for wrought iron materials; for casting manufacturing and acceptance, the drawings, operating conditions, and… should be considered.
